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1-20 of 45 Results
  1. Drivetrain
    2002 duramax 2500 with 245k miles, slips out of gear today when going 45 with a whoosh sound. Let off throttle and it goes back to normal. When i stop tho it wont go in reverse. Turn key off and back on and everythings fine until i get to moving again and then after awhile it does it all over...
  2. Transmission Shop
    Hello all, I am new to the forum and to owning a GMC. I just bought a used 2013 GMC 3500HD Denali and as luck would have it after 3 days of owning it. I got all the classic TCM crapped the bed issues. I scanned it and got Code U0101 Lost comms with TCM and P0193 Fuel pressure sensor circuit...
  3. Transmission Shop
    I have a 2003 gmc 2500HD LB7 4wd with 290k on it. Recently I've noticed it "jerk" for a split second only while cruising the interstate. The transmission fluid looks great and smells great. I took down the pan to change the inside filter along with the spin on filter. Everything looked good on...
  4. 911 Problems Forum
    I changed my #6 glow plug in my 2011 2500 this morning now my transmission randomly will not go into gear. Sometimes it runs/ drives just fine, other times the gear selection indicator will not show up and it doesn’t go into gear/ drops in gear very aggressively. I think it might be a wiring...
  5. 911 Problems Forum
    I just installed a stage 3 built transmission from dmax store and just took if for a drive it keeps throwing a p0717 code and not lettting me shift over second I cleared the code and same thing
  6. 11-16 LML Duramax Powertrain
    Hi guys! I noticed a slight clunk driving out to Arizona the other day when I would coast and go on and off the gas pedal. When I got to destination, I went from drive to reverse, and when I started to let foot of brake pedal to start to roll back, a massive clunk happened. I though my...
  7. Transmission Shop
    I'm about at my whits end with my built trans. Had it built in March of 2022 and ever since I've been chasing a leak from the bellhousing area. Shop that built it had been great about trying to fix it under the warranty but it still leaks. They resealed the whole trans the last time they had the...
  8. Transmission Shop
    I recently picked up a second farm truck(2007.5 2500HD). It appeared to have a decent transmission leak coming from around the front of the pan near the bell housing when I bought it. Last week I dropped the pan and replaced the filters and gasket. While doing so I noticed a scratch on the...
  9. 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...
  10. 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
  11. Transmission Shop
    Truck will not go into reverse and will barely move forward. My truck is stuck on grass of my front yard. The only code I currently have is P0972. Scanner indicates problem with PSS1 has a open circuit. While reviewing scanner DIC turned on indicating DFR needs to be cleaned. Before truck got...
  12. General Discussion
    be patient with me because i don't know a lot ! my 2003 chevy duramax 2500hd has been a great truck but late last year i was driving and my truck went to shift and the transmission "popped" and lost all the fluid so wouldn't shift. pulled over and noticed the dipstick tube was forced out so all...
  13. Transmission Shop
    I have a 2008 chev 2500HD and getting the P0658 code. First time yesterday. Cleared code and it ran fine for 80 miles, now it's stuck in 1st gear. When shifting to D or R, the transmission jolts. Any thoughts? Sounds very similar to your issue you had. Did you have any more issues after fixing...
  14. Transmission Shop
    Hey guys. Been working on a 2010 Chevy Duramax HD. Allison 6 speed. Ive replaced both Trim solenoids, and all shift solenoids. New Filters, new pressure switch assembly. Yet i am still getting a code p0877, Which says is a low voltage problem. Ive traced wires, replaced the internal harness, and...
  15. Transmission Shop
    2014 Chevy Silverado 2500 HD 6.6 l diesel allision transmission . Had something put hole in radiator changed it on side of road ,coolant level low came on but engine temp level didn't get hot (210 deg ) .now home I'm noticing a clang when I step on gas harder at about 45 mph does not do if...
  16. Transmission Shop
    Howdy all. LBZ with Alli 1000 and 263xhd Tcase Having the codes for improper gear ratio for both 6th and 5th, 4th almost feels like it could happen there too. I'm getting the common 'transmission bump' now. It seems improbable to conclude those clutch packs are done... When driving it'll drop...
  17. Drivetrain
    Hey, im looking to buy an 08 2500HD silverado, i found one for a good price but it needs a transmission. The current transmission is a automatic but i was wondering if it would be possible to manual swap it if i bought it. i dont know if chevy even offered a manual in 08 but i thought about...
  18. General Discussion
    So I’ve been having this issues for over a year now. Last year a trans fluid line blew and made The tranny slip with no fluid in it, good thing it happened a block from my house. After I fixed it up and re filled it she worked fine for few weeks then it started to get stuck into gear i believe...
  19. Transmission Shop
    Hey guys, looking for some advice on my truck. It is a 06 duramax lbz all stock with the allison automatic 186k miles. Yesterday driving my truck home from work I noticed my truck was shifting later than usual, and at some speeds(right around 32-45) didn't want to shift up into the higher gear...
  20. Transmission Shop
    I just did a fluid, internal filter, external spin on filter, and pan gasket change. When I finished I looked at the old internal filter and realized there was no seal on it, which means it separated and stuck in the hole and I just jammed the new filter with its gasket into the old gasket. I’ve...
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