allison

  1. 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...
  2. AlRob

    LMM - Shift Inhibited

    I'm at my wick's end with this and come here hoping someone could shed some light on the situation for me. 2010 GMC Sierra 2500HD - 4x4 - 155kmiles - MiniMaxx Tuner on Street Tune Basically, a month ago my tranny slipped a couple of times between gears out of nowhere within a two day span. Was...
  3. 1

    Tempermental Allison

    Bought 2002 HD 2500 Duramax, there are no codes listed for trans, what happens occasionally is when it shifts to 2nd or 3rd when driving normal, there is a very short rev-up of engine rpm when making the shift. You can hear and feel a definate blip in the throttle when it shifts. It works...
  4. 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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