transmission

  1. ClappedDmax

    Help please, dropped driveshaft

    Hello, I’m new to owning a DuramaxI, my truck is a 2004 GMC Sierra 2500hd lb7 with 390k. I need help/advice on what to do. I recently had a buddy install ujoints (duralast brand) because the gear clunk & vibration when driving. After install I drove 40mi. to St. Louis & on my way home, Im...
  2. E

    Built Transmission Issues

    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...
  3. B

    Best PreBuilt Transmission Brands

    Hello guys, I have a 2006 LBZ Drama and the stock trans is starting to slip some so I am finally ready to pull the trigger on a built transmission. I would like a prebuilt one (have a completed one shipping to me and send my core back). What Brands do you recommend, what would be the best...
  4. C

    Need help with LB7/Allison 5 Speed

    So I had a small incident and ended up having to replace my Tcase tail housing, extension housing, bellhousing, torque converter, and the Adaptor plate on the back of the engine. I got all this done and installed correctly as far as I know (flipped tranny on its face when installing extension...
  5. F

    Slow leak on LB7 Transmission

    I am looking for any input at all: 1. I have a small transmission fluid leak (its red). It is not dripping from any one noticeable bolt. When I look at it, the gasket glistens a little as if its wet then pools at one of the transmission pan bolts until it drips. 2. Background history. 190k. I...
  6. D

    No shift gear indacator on dash

    I got a stage iv suncoast and has been working great for 6 months. Tonight the gear shifter indacator (i guess thats what it is called) is not showing that it is any gear. Reverse always lights up and 1st gear will show. When i am going down the road the D light will box around it and then it...
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