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.

HELP TH400 install

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ftn96, Nov 20, 2000.

  1. ftn96

    ftn96 1/2 ton status

    Joined:
    Sep 26, 2000
    Posts:
    3,238
    Likes Received:
    0
    Location:
    Nashville Tn
    Got a 90 Jimmy w/700R4 and 241, just got deal on TH400. What all am I going to have to do to get this to work. I know I will need to move the crossmember,
    will I need to get an adapter for the mate to the 241 or will I need to get a diff t-case?
    And The 700 (4L-60) I have is not the Electric one but I someone told me it still has something controlled by the computer. Plus Im bolting this beast up to a 350 turned 383.

    Don't you buy no ugly truck!
     
  2. Emmettology 101

    Emmettology 101 3/4 ton status

    Joined:
    May 9, 2000
    Posts:
    8,126
    Likes Received:
    0
    Location:
    FL
    You will need an adapter to mount the 400 to the NP241 and an out put or input shaft to match the splines.

    Anyone else think of other things? I am drawing a blank.

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; http://emmett.coloradok5.com
     
  3. ken

    ken 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,244
    Likes Received:
    0
    Location:
    Anaheim, CA
    I am going thru this same deal on my 90 Sub. Getting rid of the 700 in favor of a TH400. The input of your 241 is now 27 spline. The 400 version 241 has a 32 spline input. I am trying to find out if these gears are easily interchangeable or not. If so, a new 32 spline gear and you're ready! Well, except for the adapter, which you can source from GM or a bone yard...even a TH400 to 208 adapter will work, which allows you to go back to 1981 model years looking for the adapter. Screw Advance, source the parts from a bone yard!!

    ken
     
  4. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

    Joined:
    Jun 20, 2000
    Posts:
    453
    Likes Received:
    0
    Location:
    Long Island
    the electonically controlled part of your non-electronically controlled transmission, is, I believe for the converter to lock up........js
     

Share This Page