Duramax Leaking Transmission Fluid

I've a Nissan Sentra 2007 and it is leaking transmission fluid and I'm unable to figure out from which part is it leaking from but the bottom pan is wet and a 3-4 cm puddle is being formed overnight. 2017 Silverado and Sierra models equipped with the 6. 6L Duramax diesel resources for GMC/Chevrolet diesel pickup owners and prospective buyers. So, as soon as the transmission cooler lines at the radiator of your car are starting to leak, you should immediately take necessary steps to prevent a further issue from arising. I've had a coolant leak that I can't find for about a year. If your transmission fluid is a thick consistency, don't worry, that is sign of healthy fluid. Im at a total lose here i have no idea what could have caused this, the tranny always shifted great. This is hard to narrow down as it could be a space in a pan gasket, torque converter, fluid lines, the transmission pan, or the seals. 1- How do I check the transmission fluid level? 2- I have a leak. In 2005 the Generation 4 was switched to a 6 speed transmission. Some drivers may have difficulty selecting gears or experience transmission slip. His trans in the new Chevy had a shifting glitch and GM replaced the transmission without letting the service tech at the dealership even take the pan off. Not ever changing the fluid is usually what causes the transmission to fail; not changing it after the fact. On the back of the engine you'll see the dipstick in a long tube that goes to the transmission. Common Issues and Problems We See In The Shop With The LB7 6. Install the pump rub kit and look around while you have it apart. Or tried to. I tried searching the forum but couldn't find much about it so I just wanted to ask what would the symptoms of an overfilled transmission be. Automatic Transmission Fluid How to Check Automatic Transmission Fluid It is not necessary to check the transmission fluid level. AFE Power Allison 1000 Transmission Pan 01-16 6. The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. Like an oil change for your transmission, help optimize performance and longevity of this key system with a visit to Jiffy Lube® for a transmission fluid exchange. It isn’t a “real” Duramax or even a “GM” engine, and it isn’t technically a “VM Motori” engine either. They took the cross arm off to pull the lower oil pan off, then removed the transmission and fly wheel to get to the upper oil pan and adjusted the oilers. 2004 escalade awd ,89990 miles - discovered i was leaking tranny fluid after some abnormal shifts between 2nd and 3rd gear. When i parked i noticed some fluid on the ground under front of truck. Depends on what type of fluid you have in your transmission. Why is this? No engine code comes up when I run the obd 2 on it. With our assortment of seals and gaskets you’ll be able to keep fluids inside the transmission where they belong and the tarmac clean. has trans fluid leak after pulling fifth wheel camper. com FREE DELIVERY possible on eligible purchases. The bus has the 6. This is my personal 2002 Chevy Silverado 2500 HD Duramax 4×4. 1 liter gas engine with the allison automatic transmission. I have seen the rear plate leak, and have done a few re-seals. 2017 Silverado and Sierra models equipped with the 6. 6L Duramax in GMC and Chevrolet pickups since 2001. It isn't leaking very much fluid and only when I am moving. You really need to get a good look into the engine valley and make sure the injection pump or turbo oil lines aren't leaking before you carry on, I've seen those get confused with rear plate leaks. I think it's a vent for the transmission and just runs over the transfer case. 6 LB7 diesel pickup or are looking to buy one, here are some common issues and problems we have run into in our shop. Here are the most critical pieces of information in understanding this category! Transmission oil cooler lines are typically routed along thepassenger side of the vehicle under the hood. If my diagnostic is correct I believe I am leaking transmission fluid from the radiator hoses. Sluggish shifting or hesitancy shifting gears can indicate a transmission fluid leak in you 2005 GMC Sierra 2500 HD SLE 6. Kit Contents: Transmission Lines. Sinister Diesel is rated 4. I just bought my 2014 2500HD. Also, inspect and top off W/W solvent, brake fluid,npowerlsteeringrfluid, transmission fluid, coolant, transfer case, and front and rearaaxles. HD vehicles equipped with a Duramax Diesel engine, the transmission cooler lines may be rubbing on the front frame/bumper mount bracket. It isn't leaking very much fluid and only when I am moving. What you need to remember is that brake fluid is characteristically slippery to the touch — more so than engine oil or automatic transmission fluid. The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. 2017 Silverado and Sierra models equipped with the 6. Direct-fit brackets and tailor-made hoses make installation easy. Also includes links to relevant forum topics on the code. There is a great deal of information out there on the fact that the ATF in the transfer case gets hot and burns off. If the transmission fluid looks milky brown, it has been contaminated by coolant from the radiator through a leak in the automatic transmission fluid cooler. SYMPTOM SUMMARY There is a burning odor emanating from under the hood. One of the most common problems are fluid leaks. Just wondering, do I have to use the new blue x-case fluid from Chevy, or can I use Mobil1 or Royal Purple. It is a 3500 Duramax. The likely source would be the breather located at the top rear of the trans main case. If you’re wondering how to tell if your rear main seal is leaking, then your vehicle must be leaking something. His post literally says where the transfer case and transmssion leak. The bus has the 6. The rod, main, & cam clearances are measured with dial bore gauges & micrometers. PATC is on the cutting edge of performance rear wheel drive American transmission development. Exhaust Fluid Quality Poor Message Displayed, Reductant Fluid Quality Test Status will Pass, Time Out, Fail or Interrupt – 2010-2016 Chevrolet & GMC with Duramax Diesel 6. A new "Generation 4" 1000 was introduced in 2005 that added a 6th gear at the very top of the ratio ladder, making it a double-overdrive. Use also in light duty manual transmissions to increase shifting ease and transmission life. The consumer stated gm was not addressing the issue properly as the updated transmission lines were failing in the same location. PITA tohave to pull the driveshaft to fix it though. The engine should be running when you check the transmission fluid dipstick on a 2015 Chevrolet Silverado 2500 HD LT 6. 6L Duramax takes you a long way in protecting your transmission. I've never once seen a duramax rear main leak, but that's not to say it can't happen. Five problems related to transmission fluid leaking have been reported for the 2008 Chevrolet Silverado 2500. Changed seals, gaskets, o-ring, and installed new rubber washers on converter housing bolts, as well as copper washers on the two lower bolts. Join us now and experience the difference!. This 1-qt Super Tech DEXRON-VI Automatic Transmission Fluid features a blend of premium base stocks and advanced additives. If it was bad it would allow fluid to leak from the transfer case into the transmission and vise versa. Call Duramax Transmissions for an expert opinion: 503. So, as soon as the transmission cooler lines at the radiator of your car are starting to leak, you should immediately take necessary steps to prevent a further issue from arising. Check your owners manual but I believe your 2007 would also use it. It may seem like a rather remote possibility, but engine coolant, or anti-freeze can get into automatic transmission fluid. It was not my brakes i guess, they did not smell, I looked under truck and smoke was coming out, transmission fluid was leaking all over the driver side of tranny and t case. When considering the safety of driving with a transmission fluid leak, here are some things to know: One of the main causes of a transmission fluid leak is a gap in your transmission. On some occasions, transmission fluid may be contaminated from coolant in the radiator. Blueprinting is defined as removing or narrowing the tolerances found in mass production engines. How To Guide! Full Duramax Allison transmission service! Filter & Fluid Change! This will save your transmission. Advance Auto Parts has 5 different Automatic Transmission Fluid for your vehicle, ready for shipping or in-store pick up. Updated 02/16/10. Truck has 58k on it now, 1st time I've noticed it, fluid is still good, only a tiny leak, but very annoying. Duramax engine specs, history, hp/torque timelines, & much more. Contains no solvents. if fluid level okay sound. Open the hood and locate the transmission cooler. They say they "think" it is the transmission pan gasket. There's a separate tank in the radiator for transmission fluid that allows the coolant to take heat away from the ATF without mixing the two liquids. If metal debris blocks fluid passages, the pressure needed to obtain proper shifts can't be maintained. It did seem to have a transmission leak that drooped about a 50 cent piece size in about 5 minutes. 6L Duramax Engines, 2001 - 2016 Model Years. A dye test or careful inspection under pressure will save very expensive misdiagnosis. These conditions may be due to cooling system leaks or an improper coolant fill procedure. Before adding transmission fluid, make sure that your engine was running when you checked the fluid level. A permanent solution to a growing problem. Then check the dipstick again in a day or two. The Best selection of Automotive Performance parts shop for diesel vehicles. Other symptoms include slipping gears or slow shifting. Determine Height of the oil level on the dipstick and using the height, the transmission temperature, and the Transmission Fluid Level Graph, determine ifthe transmission oil level is correct. Two of the transmission coolant lines began leaking transmission fluid at the crimp ends in March of 2009. I am still new to the RVing life and have a question about towing our rig. Common Low Transmission Fluid Symptoms. It's the best way to reduce the likelihood of expensive transmission damage due to overheated transmission fluid or fluid contamination. Within 5-6 months, the transfer case is going to be filled with tranny fluid and overflow out the overflow vent. Featuring Unlocked Updated Eliminator Aluminised available here online. Compare prices of unlocked updated eliminator aluminised and comparable listings. Save on Castrol Transmax DEXRON®-VI Transmission Fluid (1 Quart) 15B1A0 at Advance Auto Parts. The lines can leak oil, which reduces the overall functioning of the oil cooling system. checking engine oil you keep the car off so the oil can drain to bottom of pan but to check transmission fluid the car has to be running in park or neutral if engine is cold should be on cold mark which is the first line if hot other line. Changed seals, gaskets, o-ring, and installed new rubber washers on converter housing bolts, as well as copper washers on the two lower bolts. Automatic transmission temperature rising above 175 degrees is also a problem. 8L Duramax the same as the Jeep Liberty CRD 2. It is not a bad leak but it is not a good leak either. This kit comes complete with everything needed to get the job done right the first time. One of the most common problems are fluid leaks. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. This 1-qt Super Tech DEXRON-VI Automatic Transmission Fluid features a blend of premium base stocks and advanced additives. Two of the transmission coolant lines began leaking transmission fluid at the crimp ends in March of 2009. I'm struggling with why the region forward of the transmission pan (torque converter housing) is wet with fluid if it is the pan gasket. This is an easy fix,just drill a small. 8L Turbo Diesel is the cleanest diesel truck engine ever produced by General Motors and meets some of the toughest U. When the lock up occurs you would see an immediate drop in fluid temp of about 20° F. The LB7/LLY models came with 4 gears and Overdrive, or "5 speed". Allison 1000 transmission specs, ratios, and information. Mike Allen hit the nail on the head. Estimate does not include taxes and fees. Labor costs are estimated between $85 and $108 while parts are priced at $86. It is definitely engine oil in the coolant reservoir. Plus, its robust construction readily defends against possible damage from road debris and corrosion. That would not cause leakage to the outside of the unit if it was leaking. So we go ahead and start the truck and fill it up with the proper transmission fluid so we can locate the leak. It could be cause by the absence of a vent hole in the dipstick. Cleaned it well and then drove it. 6L Check out the deal on AFE Power Allison 1000 Transmission Pan (Raw Finish) 01-16 GM 6. When pulled over noticed transmission fluid pouring out. Why Put Transmission Fluid In Diesel Tank? I have heard that adding some transmission fluid to the fuel tank can be beneficial. He discovered the car (a 2002 Dodge Neon with 137,000 miles) leaking antifreeze and transmission fluid on the street. I have a 2008 chevy 6. Transmission fluid leak. I recommend this fluid and doing regular maintenance on your duramax Denali. The Best selection of Automotive Performance parts shop for diesel vehicles. At any power level beyond 600rwhp, the LBZ’s factory pistons are at risk of cracking. Each budget assumes you’re starting new, with a bone-stock truck. Two of the transmission coolant lines began leaking transmission fluid at the crimp ends in March of 2009. Mechanic's Assistant: What is the color and consistency of the fluid? And where. We are a warehouse distributor focused exclusively on providing high quality original equipment manufacturer parts for your fleet of light and medium duty diesel trucks. 920-361-7700. Sinister Diesel reserves right to modify, change or cancel any offer before, during and/or after any sale or transaction. Shop Transmission Options for the GM Duramax 6. Get yours online today and pick up in store. transmission oil temperatures are below certain levels. Thank You!-BDP. Trusted manufacturers, top brands, low prices and free shipping over $49! Call 866-255-7212. This is a great upgrade when building your Allison transmission. Parts + Service. I think it's a vent for the transmission and just runs over the transfer case. An O-ring is attached to the male thread of the adapter that prevents transmission fluid leaks at the test port connection. Checking the fluid level in the automatic transmission of your Dodge Dakota pickup should be part of your regular maintenance routine. Buy Fleece Performance Engineering FPE-TL-LB7-LLY Transmission Cooler Line (01-05 GM Duramax 6. It will form stains on your driveway or garage floor but more importantly, it can cost you a lot of money in repairing the leak and replacing the fluid. Other symptoms include slipping gears or slow shifting. Duramax Transmission Service Tip: Let color and smell be your guide. Well low and behold it is not leaking now. For sale is a 2008 Chevy Express Bus with 117,658 miles on it. Add or remove oil as necessary and recheck the oil leveL 9. This way, you can tell if the leak is power steering fluid (reddish or light brown, from the front of the car) versus auto transmission fluid (also often reddish or light brown, but dripping from. Description: CP Carrillo Duramax Diesel Performance Forged Rod Set Duramax 6. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing. Kit Contents: Transmission Lines. I followed the vent tube and I don't think it's a vent for the transfer case. 0L Powerstroke initially edged marginally above the Duramax in rated power, but the Duramax will regain that title with the release of the new RPO code LBZ Duramax 6600 in the fall of the 2005 calendar year. 2 x 3/4"-16 O-ring to -10AN fittings (LB7-LLY kit only) 4 x Black Zip Ties. (red fluid on/around transmission pan). The 4 Best Automatic Transmission Fluids Available Automatic transmissions require a specific lubricant with particular properties, called automatic transmission fluid (ATF). Pure Diesel Power offers one of the most complete product listings in the diesel engine parts industry, ensuring that, no matter what you need for your diesel truck, you can find it on our site. My fight would be only 6000 miles or less then. Whether your 2011–2014 Chevy/ GMC 6. This was the only method known to change the fluid so it was the acceptable. Now at 13,500 miles the fluid level is at the low end of the safe zone on the dip stick. Sinister Diesel is rated 4. 5-2010 LMM! XDP carries all the parts and accessories you need for the best diesel performance. transmission fluid. Responding to electrical signals sent by the Engine Control Unit (ECU), or the Transmission Control Unit (TCM), the solenoid pack opens and closes valves, allowing the fluid to flow into the transmission valve body. Power steering fluid and Automatic Transmission Fluid are both hydraulic fluids. I have a 2003 GMC 2500 HD with Duramax - Allison transmission. :chillpill: That is too cold (in reference to the weather). TIP: Any vehicle that previously used DEXRON-III for a manual transmission or transfer case should now use p/n 88861800 (88861801 in Canada) Manual Transmission. Key Benefits. Merchant Automotive has a long history of building transmissions for customers from all over the country who depend on their truck for many types of applications. See all problems of the 2006 Chevrolet Silverado 2500. 6L V8 Turbo Diesel Standard Cab Pickup (4 Door). Pump rub occurs when the 5 positioning tabs holding the pump in place wear over time, thus causing the oil pump to come into cont. After GM sold off Allison, Allison no longer recognizes DEX VI as an approved schedule fluid. A mechanic would need to determine if there is a gap somewhere in the transmission, a leak in the pan, a nick or crack in the fluid line due to road debris or heat, loose or broken seals, etc. So if you're low on transmission fluid, you almost certainly have a leak. Here are the most critical pieces of information in understanding this category! Transmission oil cooler lines are typically routed along thepassenger side of the vehicle under the hood. Transmission fluid may leak from seals, gaskets, lines, and fittings. Tighten to 18-21 lbs-ft. If you thought your transmission was safe from wear at least while it was in neutral, the truth might surprise you. 1L Gas engines are known for cracking the extension housing causing a hard to find leak. Approved by General Motors, the Global Full Synthetic ATF is compatible with nearly all newer makes and models, automatic transaxles where a. The five-speed manual transmission with low gear uses GM Goodwrench Synthetic manual transmission fluid or equivalent 75W-85 GL-4 gear oil. :chillpill: That is too cold (in reference to the weather). I followed the vent tube and I don't think it's a vent for the transfer case. I am looking for input into what it could be. I have a 2006 GMC 2500HD 4WD Duramax diesel with the Allison HD auto transmission. You have to warm up your truck and leave it running. The Allison deep pan will add 4 quarts to the trans sump and help cool the fluid down in your dmax diesel pick up. This is between the tranny and transfer case, looks like what I would call an adapter plate, what is causing this leak? 04 lb7 3500. My truck, which as been almost bullet proff until now, is leaking tranny fluid at the bellhousing. Description: DHD Allison Transmission Repair Line Kits Your ONLY guaranteed leak proof transmission line kit available in the aftermarket. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing. The Mercon LV fluid has a very high expansion rate compared to SP and if the fluid is not set just correctly, it can purge out of the vent. Making a loud clunking in 4wd when I put it in gear. they had to pull the transmission to find out where leak was coming from. 1051344, without Canada 10953465). Check and replace air filter as needed. Replied by wysetech on topic Chevy Silverado coolant leak The most common coolant leak problem on GM trucks is the gaskets between the water pump and the block. Use of the incorrect automatic How to Add Fluid transmission fluid may damage the vehicle, and the damage may See Maintenance Schedule on not be covered by the vehicle page 11-3 to determine what kind of warranty. 6L Duramax is designed to help eliminate cracked transmission tail shaft housings (located between the transfer case and the transmission). The engine in your 2008 Chevrolet Silverado 2500 HD should be running when you perform a transmission fluid level check, otherwise it will be inaccurate. After reviewing a number of threads on the duramax forums, I decided to change my transfer case fluid (Dex VI) at 43k miles. Also, inspect and top off W/W solvent, brake fluid, power steering fluid, transmission fluid, coolant, transfer case, and front and rear axles. If your truck has this weep hole (arrow in photo below), you will be able to see it with the driveshaft removed by flipping the yoke to the side. Empty the power steering bottle, by siphoning or other means. The five-speed manual transmission with low gear uses GM Goodwrench Synthetic manual transmission fluid or equivalent 75W-85 GL-4 gear oil. Common Low Transmission Fluid Symptoms. The front seal on the power steering pump was worn and leaking, as well as the lower hose. Re: Leaking Allison Transmission: RLewis: 1-11-08 : It would be rare for this sensor to leak,although it is easily removed,the only seal is an o-ring. I just replaced the solenoid pack in the transmission valve body today cuz I had that code. Sluggish shifting or hesitancy shifting gears can indicate a transmission fluid leak in you 2005 GMC Sierra 2500 HD SLE 6. 2002 3500 Silverado Duramax with Allison trans. I have a 2008 chevy 6. After 30 seconds, turn the car off and look for leak traces of red transmission fluid on the paper and the steel lines. I have seen the rear plate leak, and have done a few re-seals. After GM sold off Allison, Allison no longer recognizes DEX VI as an approved schedule fluid. Expert Transfer Case Repair. Nice looking truck!. In 2006 manual gear selection was introduced, which gives the driver better control of the transmission. Like a radiator, a transmission oil cooler can become clogged or develop leaks. Lucas engine oil stop leak is a unique formulation of Lucas additives and base stocks designed to stop leaks in engines. it isnt leaking bad but they. CARiD is well-known for the quality parts and accessories all over the world. Designed and operated by Duramax Owners for Duramax Owners. Fix your leaking transmission lines with these heavy duty, high flow, flexible transmission lines. As the title says, my transmission is leaking transmission fluid (red) between the rear case of the transmission and the transfer case. In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register. Most modern radiators have end tanks. If left untreated, low transmission fluid levels may lead to bigger. The gasket your talking about goes where the transmission and transfer case bolt together. All 6600 Duramax™ diesel engines have this condition; however, some are more audible than others. While some small leaks aren’t a concern, some fluid leaks can quickly create damage to your car that can require costly repair or replacement. the lines are a common leak point due to corrosion. Open the hood and locate the transmission cooler. Also, inspect and top off W/W solvent, brake fluid, power steering fluid, transmission fluid, coolant, transfer case, and front and rear axles. The components in the Maximum Transmissions were selected specifically based on our experience working exclusively on the GM Duramax trucks with an 1000 Allison transmission. The bolts of the transmission pan can also become loose over time, which will lead to leaks. Transmission fluid leak. Checking the transmission fluid in your car is a relatively simple procedure and should be done about once per month. Here are the most critical pieces of information in understanding this category! Transmission oil cooler lines are typically routed along thepassenger side of the vehicle under the hood. Super Leak Fix (1305) One Seal Stop Leak (1334) Clutch Fluid with Stop Leak (1350) Transmission Repair (1400) CVT Transmission Fix (1414). The engine in your 2005 Chevrolet Silverado 2500 HD should be running when you perform a transmission fluid level check, otherwise it will be inaccurate. check and add as neccasary, and find source of your leak as well. Checking the fluid level in the automatic transmission of your Dodge Dakota pickup should be part of your regular maintenance routine. Either clogs or leaks will make the oil cooler less effective at cooling the transmission fluid. 7l, 185,000 miles. 6L Duramax takes you a long way in protecting your transmission. Each transmission system is slightly different and there are various types of transmission fluid available, which can influence how much you pay to have it changed. The automatic transmission is one of your vehicle's most complex components. 6 duramax with an allison transmission. The transmission fluid helps keep the transmission lubricated and prevents any damage to the transmission system. Duramax Transmission Service Tip: Let color and smell be your guide. One of the most common problems are fluid leaks. Park your car on a level ground, if the fluid is about 1/4 of an inch higher than the FULL mark, it doesn’t h. I just checked the trans fluid and what was on the stick looked clear and rusty. By Carl O’Reilly. The truck seems to drive fine and I checked the transmission fluid level and it looks good. I'm only gonna post this for only oily leaks on their 2015 chev. At 12,400 mile the check engine light came on while on Interstate I65. this is a permanent fix for the leaking transmission cooler lines on the gm light duty pickups equipped with the duramax, or 8. This seal has a reservoir of more than 16 ounces of transmission fluid. I go and pick it up. Plus, its robust construction readily defends against possible damage from road debris and corrosion. Leaking fluid will be red. It did seem to have a transmission leak that drooped about a 50 cent piece size in about 5 minutes. More discussion about this transfer case leak problem can be found in The Diesel Page Forums. Lucas Power Steering Fluid with Conditioners is formulated with the finest base oils and a special Lucas additive package that outperforms all others, providing smooth, quiet operation while conditioning seals to prevent leaks. Transmission Mount to Crossmember Nuts: 29 lb-ft Transmission Mount to Transfer Case Adapter Bolts: 34 lb-ft Following this service procedure, the transfer case will require 1. Locate the area of the transmission line where fluid is leaking. Volkswagen ATF Fluid Guide idparts on January 16, 2015 We answer frequently asked questions about automatic transmission fluid, like, when does it need to be changed and what fluid type is required. It is a 3500 Duramax. Adapta-a-Case Source:. Fluid leaks occur when the seals around the transmission or driveshaft become defective, causing wear on the transmission. Duramax Transmission Service Tip: Let color and smell be your guide. Both models use the same replacement filters and have identical pressure ratings, reducing inventory. Allison 1000 transmission specs, ratios, and information. Duramax Transmission Service Tip: Let color and smell be your guide. Closer inspection revealed more fluid on the bottom of the transmission. The symptom may be more noticeable after the engine is hot or operated for an extended period of time. The bolts of the transmission pan can also become loose over time, which will lead to leaks. Transmission fluid may leak from seals, gaskets, lines, and fittings. Consumer complaint concerning transmission failures on 2003 silverado. There is an input seal to the transfer case on the input shaft of the transfer case you will see once you get the transfer case out. If you’re wondering how to tell if your rear main seal is leaking, then your vehicle must be leaking something. Before adding transmission fluid, make sure that your engine was running when you checked the fluid level. 6L Duramax truck. Like all Duramax-powered GMs, the Allison automatic transmission will need to be upgraded early on in the modification process, namely if you plan to go much further than 400rwhp. It has 165,000 miles on the clock, and I have owned is for nearly eight years. *ts the transmission fluid was burnt, the reverse gear was inoperable and the transmission shifter was loose. If your transmission fluid is a thick consistency, don't worry, that is sign of healthy fluid. 620 7/16 bolts SET. You can buy the right stuff from a Allison dealer. Im mechanically inclined and should have the tools I need but I dont like to take chances of having to have the truck towed or it being down. Like any lubricant, the fluid in an all-wheel drive or four-wheel drive vehicle's rear differential will eventually break down and need to be replaced. If any of the following symptoms show up, the first thing you should do is check the transmission fluid level to confirm. While not much has been added or changed to the pickup styling or option list, the big news is the new RPO (Regular Production Option) code LBZ Duramax 6600 diesel engine and an upgraded Allison automatic transmission to include a double overdrive sixth gear. Check your owners manual but I believe your 2007 would also use it. They don't leak as often, but they do leak ocassionally. The key to distinguishing the fluid origin is where is drips. Son called me last week after the cold spell and said transmission was leaking. Re: Leaking Allison Transmission: RLewis: 1-11-08 : It would be rare for this sensor to leak,although it is easily removed,the only seal is an o-ring. Low Fluid or Leak. The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. Like a radiator, a transmission oil cooler can become clogged or develop leaks. 7l, 185,000 miles. A low level of transmission fluid will cause the pump to suck up air with the transmission fluid and the result will be air bubbles or foam seen in the transmission fluid when checked on the dipstick. Installing PPE's Duramax Transmission Cooler. 6L LB7 / LLY Allison): Cooling Lines - Amazon. A dye test or careful inspection under pressure will save very expensive misdiagnosis. I just checked the trans fluid and what was on the stick looked clear and rusty. Antifreeze. Allison 1000 transmission specs, ratios, and information. 6L Duramax Engines, 2001 - 2016 Model Years. emissions standards, thanks in part to a cooled Exhaust Gas Recirculation (EGR) system.