TH400 Rebuild kits

Discussion in 'The "Juice Box"' started by 1969RIVI, Dec 1, 2018.

  1. TexasT

    TexasT Texas, where are you from

    I'm not a fan of the brand of clutches in that kit(a local builder got a bad batch of bands from them and the clutch material fell off when out into use. might have been an isolated incident but I didn't want to chance it and it has been yrs ago, I'm sure it is good stuff). I am trying out some exedy brand clutches in this current build but have had success with raybestos and Borg Warner.
    I would buy name brand stuff even though it costs more.
    You will probably want some different thickness steels to adjust the clearance on the direct clutch set.

    I'm guessing you have hand tools and some mechanical knowledge. You need an area that is clean and has a big enough space to lay out the pieces. I like to use the torque converter to stack the pieces on as they are removed from the case so I don't get mixed up. Then it can be worked on(new seals, bushings and such) as it is stacked back into the case. I try to inspect the pieces as I remove them so I know what I need to get/order if it is bad. And even if the bushings look good, I think on a high mileage unit it is a good idea to replace them. I have used a few different ways to hold the case.
     
    Last edited: Dec 2, 2018
  2. Donuts & Peelouts

    Donuts & Peelouts Life's 2 Short. Live like it.

    7654340122. His name is matt
     
  3. 1969RIVI

    1969RIVI Well-Known Member

    Thanks for the pics! Well I may have to buy one of those presses! We have princess auto up here which is the same as your guys harbor freight.
     
  4. TexasT

    TexasT Texas, where are you from

    The press is great for all kinds of stuff.
     
    Donuts & Peelouts likes this.
  5. 1969RIVI

    1969RIVI Well-Known Member

    Yes they are I use my buddy's to press wheelbearings
     
  6. 1969RIVI

    1969RIVI Well-Known Member

    So my GM TH400 high performance rebuild kit arrived today and I can't wait until spring to drop the trans and rebuild that sucker!! The kit is from Transparts WareHouse Inc. (T.P.W. on Amazon) All the parts are made in the USA from what I can tell and look to be good quality. Alto red eagle friction clutches, high performance red eagle front band and Kolene steels.
     

    Attached Files:

    Donuts & Peelouts and Footbag like this.
  7. Footbag

    Footbag Well-Known Member

    What did that run you? Can you post a link for it as well?

    NVM Found it.
     
  8. 1969RIVI

    1969RIVI Well-Known Member

    With taxes, shipping and duty fees since I live in Canada it cost me $382.05 CAD which would be $285.61 USD. You would probably get it cheaper since you don't have to pay duty fees and probably not as much if any taxes. All the seals, O rings, bushings and gaskets are from Transtec made in USA.
     
  9. Ken Warner

    Ken Warner Stand-up Philosopher

    Bit of a flashback....

    Wow, back when I turned a wrench (early 90s) the old transmission guy had a GM part number that got you a kit for an Allison TH400 rebuild kit for a school bus application. Seems like the kit was about $150.00 and included red (Kevlar?) frictions, new steels, various bearings/bushings seals, a 32 element Sprague and some other stuff. At the time Hughes and ATI sold a heavy duty kit through Summit Racing and Jegs for about double whatever our price was over the parts counter. He claimed the big name kits were similar but still did not have some of the extra bits his kit came with.
     
  10. 1969RIVI

    1969RIVI Well-Known Member

    I wish it was only $150 still!! The kit I bought is pretty complete. The only things I need to get besides fluid is a new 34 element sprag and a transgo 1-2 kit to replace the stock 16 element sprag and b&m shift kit. If my b&m holeshot 2400 converter is still good I'll reuse it.
     
  11. wkillgs

    wkillgs Gold Level Contributor

    Here's a link to some of their TH400 kits:
    https://www.amazon.com/s/ref=nb_sb_...d-keywords=TH400+high+performance+rebuild+kit
     
  12. 1969RIVI

    1969RIVI Well-Known Member

    UPDATE: Today I bit the bullet and ordered a custom built 9.5" torque converter from Jim Weise at TSP. So a transgo 1-2 kit and a new flex plate from TA is all the is left to get for my TH400 rebuild. I did end up buying a borgs&warner 34 element sprag a little while ago too.
     
  13. 1969RIVI

    1969RIVI Well-Known Member

    And it has arrived!! JW "the wheel" flex plate and Transgo 1-2 kit is enroute and they should be here soon
     

    Attached Files:

  14. scubasteve455

    scubasteve455 Well-Known Member

    That cars gonna run now. Glad all that’s behind me expensive But well worth it.
     
  15. scubasteve455

    scubasteve455 Well-Known Member

    It’s amazing how many parts were broken in my tranny what a mess.
     
  16. 1969RIVI

    1969RIVI Well-Known Member

    It sure is expensive but like others say "buy once cry once" I've been buying parts here and there over the off season so it wasnt a big hit all at once.
     
  17. 1969RIVI

    1969RIVI Well-Known Member

    JW flex plate arrived today! Just waiting for the transgo kit
     

    Attached Files:

  18. StfSocal

    StfSocal Well-Known Member

    Is that flex-plate external balance or internal?
     
  19. 1969RIVI

    1969RIVI Well-Known Member

    External, the weight is on the other side. All BBB are externally balanced if I recall correctly.
     
  20. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    My only concern with that flexplate is starter pinion to flexplate teeth clearance. It looks like the one my engine was built with, and I had problems in that area. I destroyed two mini starters before I figured it out. That is why I ended up with the Robb Mc starter, you can adjust that clearance.

    EngFinal1R.jpg

    I ended up swapping my flexplate to the one below when I swapped converters.

    NewFlexplate.JPG
     

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