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  1. General Discussions
    I've had the truck for 3 years now, the trans is overheating and I put a mishimoto trans cooler on thinking that it would help but hasn't. I recently found that if I drive in tow/haul mode it cools down and stays cool in drive, it'll keep heating up till about 240 or more before I try to get it...
  2. Transmission Shop
    Shes a plow truck, had my driver in it(during a blizzard) says he lost reverse and park. Rolled up there manually put it in reverse, than drive, goes forward in most gears. Selector rarely changes. Manually put in Park to get key out. Now shifter stuck somewhere in the "middle" Wont start...
  3. Transmission Shop
    Had code p2724, replaced solenoids, fluid and filters. Now truck will not move in forward or reverse
  4. 07.5-10 LMM Duramax Powertrain
    Has anyone ever had a leak from here this transmission is about a year and a half old it’s still under warranty but gm wont warranty because the installation was done by me not a shop
  5. 01-04.5 LB7 Duramax Powertrain
    I have a lb7 duramax with a Allison 5 speed I believe my pump bushing is leaking from when it was rebuilt [bought from owner that rebuilt no warranty] I’m planning on dropping my transmission and doing the seals myself but not sure if I should do some mods while I’m in there I’m planning on just...
  6. Transmission Shop
    Is it possible to swap in an 05’ Allison 1000 to a 02’ LB7??? What do I need to do to make it happen?
  7. Transmission Shop
    Found an Allison 1000 5Speed with Torque a converter from an 05’ Duramax, can I swap it to an 02’ LB7? What do I need to do to make it work???
  8. 06-07 LBZ & LLY Duramax Powertrain
    2006 LBZ, 157k miles, 6 speed allison. stock besides exhaust, tune, and lift pump. Lately when rolling to a stop while lightly applying brakes, I’ll feel the truck hiccup and lurch/buck forward. When watching my edge, it looks like the truck will downshift through the gears, once it gets to...
  9. Transmission Shop
    I have a 2002 Chevrolet Duramax LB7 w/ Allison Trans, I was towing a truck on a trailer & my truck started to slip then my transmission cooler line blew & spit out fluid, I ended up replacing the line & filling the trans correctly but now my trans keeps slipping, I took it home, ended up getting...
  10. Transmission Shop
    Hello, I’ve just serviced the Allison in my 13 Lml I dropped the pan and replaced the internal filter as well as the spin on. I then refilled with 8 quarts initially before start up and added just over 2 more quarts after trans was brought up to temp. My readings at temp were 165 Deg- just at...
  11. Drivetrain
    Hey everyone, I created a how-to video on removing the Allison 1000 for those of us that are crazy enough to dig into a transmission ourselves. I also wrote up a cheat sheet that has a checklist, fastener location diagrams, torque specs, and other info that might come in handy. Hope it helps...
  12. Drivetrain
    Hello, I have an '02 Duramax and am replacing the solenoids on my valve body. During install, both A trim and B trim gain valves fell out and won't properly seat again. I can't find anything online on how to put them back in so I can finish the repair. Any help would be nice
  13. New Member Introductions
    2011 GMC Sierra 2500HD Denali 110K So I think my TCM decided to take a dump. Getting P0700 and P0708. Got it to limp home and shut it down for dinner. 1/2 hour later it goes into a high idle at start up (800 rpm, regen not possible) won’t go into any gear, shift indicator message, getting a...
  14. 11-16 LML Duramax Powertrain
    2013 Chevy Silverado 3500 dually 6.6 lml Allison 1000 auto trans Everything is stock except having a CM flatbed installed 1½ years ago. I was driving Saturday, kinda crappy rainy day, and suddenly my truck feels like it lost power. My first thought was fuel filter because I know I'm over due to...
  15. General Discussions
    Did a radiator change due to damage to center anyway changed it out put everything back. "Transmission fluid 1 court low" drove across yard and bam fell into neutral then strait to low gear switching to M it says 4th it let's me move it through all gears but stays in 4th. I had a problem before...
  16. 911 Problems Forum
    Hey it’s Andrew I have a 2004.5 lly the truck has a Ppe stage 4 tranny has been deleted and tuned with a dsp5 switch for 7 or 8 years never had a problem the transmission through the pu0101 code and my dash Guage’s weren’t working neither were my windows I took the truck to oreillys to have them...
  17. Transmission Shop
    Hi, new to the forum. 2006 Silverado duramax lly 4x4. Odometer almost 300k. Awhile back when I first started driving, I shifted from park to drive/reverse and it popped into neutral and i got the dash warning range shift inhibited. I let the truck sit for a bit and then drove it home with no...
  18. Transmission Shop
    2016 Dhevy 2500HD 6spd Allison. 190k. It started with the flashing D and R shift indicator for a couple of days. No codes. It would happen in the morning, and it seemed to resolve after the system heated up. Drove it most of the day yesterday with only the morning start up issues. I took off...
  19. Transmission Shop
    allison 1000, all new electronics in the trans, new harness in trans, nothings froze up valve wise, p0752 (shift solenoid a stuck on). Delete the code, drive 50 feet, re pops up. And is stuck in 3rd, with reverse. PFA
  20. Parts For Sale
    Selling a Low mileage torque converter form ATS Diesel, fits Allison transmissions. Came out of a woking LLY diesel only has about 500 miles. Got rid of the truck and has been sitting for a a few years. Fits 2001-2010
    $600 USD
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