Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Allison tranny?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by trailblazer87, Jul 14, 2002.

  1. trailblazer87

    trailblazer87 1/2 ton status

    Joined:
    Jun 11, 2002
    Posts:
    707
    Likes Received:
    0
    Location:
    Madera, CA
    Found a wrecked 1-ton from a friend and it has the new Allison 6-speed auto in it. He wants to keep the axles /forums/images/icons/frown.gif but it willing to sell me the tranny and comp. for $1500, what to you all think about this tranny, is it worth the time and money to swap in?
     
  2. Twiz

    Twiz 1/2 ton status

    Joined:
    Mar 8, 2001
    Posts:
    3,729
    Likes Received:
    0
    Location:
    Clearfield Ut.
    Nope, not worth the time and money to swap over.

    Great trans -
    But way over built/heavy for anything other than full on towing applications. Converting the electronics would be extreamly dificult.
     
  3. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    I wouldn't bother.
    Beings that Allison tranny is electronically controlled. And the TPI Vortec engine is totally different than your TBI 350 the electroinics would be a night mare.
    For a lot less than 1500 you can get a 88 or up 700r4 and a new torque converter. Or put in a SM465
     
  4. Twiz

    Twiz 1/2 ton status

    Joined:
    Mar 8, 2001
    Posts:
    3,729
    Likes Received:
    0
    Location:
    Clearfield Ut.
    Or a T400 or 4L80.


    Those Allison's are huge (and wicked heavy), I would allmost bet a guy could stuff a T350 inside the Allison case.
    *Not really, but they are monsters*
     
  5. azblazor

    azblazor 1/2 ton status Premium Member

    Joined:
    May 5, 2001
    Posts:
    1,953
    Likes Received:
    0
    Location:
    Arizona, Phoenix area
    Do it. If you have the money and the time. It would be interesting. It wouldn't be easy though, but it could be done.
     
  6. glencanyonexplor

    glencanyonexplor Registered Member

    Joined:
    Jul 14, 2002
    Posts:
    26
    Likes Received:
    0
    Location:
    Arizona
    if you don't buy it I'm interested PM me /forums/images/icons/smile.gif
     
  7. Sandman

    Sandman 3/4 ton status Author

    Joined:
    Apr 15, 2002
    Posts:
    5,653
    Likes Received:
    0
    Location:
    Pocatello, ID
    I dont think that it will work due to the computer interface. I read something about it in one of the latest mags. If you could get the engine along with it, now you might have something.
     
  8. Blue85

    Blue85 Troll Premium Member

    Joined:
    Jul 26, 2000
    Posts:
    9,073
    Likes Received:
    486
    Location:
    Grand Rapids area
    The Allison has it's own transmission controller. If you could figure out the messages that it needs from the engine controller and body computers, you could make it work. This would require extensive detailed information on the drivetrain management system. If you figured it out, you would likely be the first.

    It would be a lot easier to take the engine and the tranny and swap them both in and just figure out the easy stuff like fuel pump and vehicle speed. I would take the instrument cluster as well.
     
  9. Blazer1970

    Blazer1970 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,600
    Likes Received:
    0
    Location:
    Old Mission, MI
    And it is a 5 speed.
     
  10. trailblazer87

    trailblazer87 1/2 ton status

    Joined:
    Jun 11, 2002
    Posts:
    707
    Likes Received:
    0
    Location:
    Madera, CA
    Sounds like a mess /forums/images/icons/tongue.gif I asked and he wasn't willing to part with the motor /forums/images/icons/frown.gif , plus I have never liked the electronic shift t-case that would come with it. He was going to put the motor in a J /forums/images/icons/ooo.gif p. Found a guy who will rebuild my 700r4 for $550, with corvette servo, and all updates.
     

Share This Page