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  1. HDN

    Allison 1545 Automatic Transmission Specs

    What was the cost of the rebuild alone? I've seen around $2000 mentioned here a few times, with most of it consisting of replacing broken pistons and seals with 4L80E ones by an Allison shop. I'm hoping I won't need one for some time, assuming that the Military Mail Terminal it was assigned to...
  2. HDN

    Allison 1545 Automatic Transmission Specs

    Here's the service manual! Maybe it should go in the Deuce TMs section? I don't think this is in there.
  3. HDN

    Allison 1545 Automatic Transmission Specs

    That's in the service manual. I just found the PDF, which I'll post later when I get on that computer.
  4. HDN

    Allison 1545 Automatic Transmission Specs

    Thank you for that @tobyS . I listened to my truck shifting in my sound recording and I thought I heard the 4th gear re-locking. Here's a sound recording of my truck starting at an intersection and running through the gears: You can clearly hear the shift into 3rd gear, then 3rd gear...
  5. HDN

    Allison 1545 Automatic Transmission Specs

    The transmission is supposed to unlock between 3rd and 4th gear. And thank you for the 4L80E mention. That's a pretty common transmission outside HMMWV applications, I think, so it shouldn't be hard to get those parts!
  6. HDN

    Allison 1545 Automatic Transmission Specs

    Welcome! And you have a pretty rare truck in an M36A3! I think you should start another topic and post pics :cool: The locking transmissions eliminate losses between the engine and transmission through the fluid coupling (torque converter) in 3rd and 4th gear, increasing fuel efficiency. In...
  7. HDN

    Allison 1545 Automatic Transmission Specs

    I'll have to get this checked out now. Although my jerk may be different from the other guy's jerk. Probably best for me to get it checked out at the local Allison shop and have them do the ATF conversion as well!
  8. HDN

    Allison 1545 Automatic Transmission Specs

    It is my understanding that this is normal behavior for the 545 transmission. My truck and another owner's do the same thing. It just clunks into 4th gear, and the tranny takes its time shifting into third. I almost thought it was going into another gear between where it felt second and third...
  9. HDN

    Allison 1545 Automatic Transmission Specs

    I saw this posted in the 1545 failure poll and was surprised to see it wasn't repeated here:
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