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Flexplate Part # For V6 Odd-fire To Th350

Discussion in 'Early CJ5 and CJ6 Tech' started by mpc, Feb 14, 2020.

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  1. Feb 14, 2020
    mpc

    mpc Member

    Vista, CA 92083...
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    I've been searching the forum and online, but I haven't quite nailed this down yet. I need to buy a flexplate for my Buick V6 odd-fire (Casting 1381623) to mount up to a TH350 auto tranny I have. The tranny has the BOP housing, matching the engine.

    I can't find the part on Rock Auto (searching under Jeepsters). Also, are there specific bolts I should buy at the same time?

    I see that partsmike.com has the odd-fire flexplate, which I'm sure would be the right part, but it seems like I could find a better price than $90. Or is that the going rate?

    Thanks.
     
  2. Feb 14, 2020
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Well, the Jeepster used the TH400, not TH350.
    Don't know if the flexplates are the same.
     
  3. Feb 14, 2020
    mpc

    mpc Member

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    I was assuming the flexplate would be the same, but I have no idea.
    I guess I'd better find some casting numbers on the tranny to verify what it is. I wouldn't know the difference between a 400 and 350 by looking at them.
     
  4. Feb 14, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

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    I'd look t the Buick listings for that era. As Jim says, no TH350 in a Jeep. The cars used a BOP TH350 though. Try 1964 Skylark with a 225. All that series of engine should be the same except for balance - Buick 225, 300, 340, 350. The V8s show a couple of suppliers for flex plates at RockAuto, but none for the 225. Jeep 225 shows nothing too. Presumably you could have the V8 part balanced for a 225. Or try the Buick specialty places ... I can't recall the name offhand, but someone here will.

    If someone had a parts book, they could tell you the PN for the TH400 part - assuming it's the same as the TH350 - and you could search the net for it. IME Jeep adopted the GM part numbers in their listings, so it should work for GM sources too.
     
  5. Feb 14, 2020
    mpc

    mpc Member

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    New info: I just looked at the shape of the tranny pan and it matches the shape of a TH400, not a 350.
    The guy I bought it from was guessing what it was. I bought it because the Dana 20 transfer case and adapter that it came with was worth the price alone.

    I still couldn't find a part number for the TH400 flexplate to Buick V6 odd-fire, but I I don't really use Rock Auto, so I might be missing something.
     
  6. Feb 14, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

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  7. Feb 14, 2020
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    The OEM TH400/V6 Jeep numbers are:
    1381226, later changed to to 994723.
     
  8. Feb 14, 2020
    mpc

    mpc Member

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    Thank you.
     
    Last edited: Feb 14, 2020
  9. Feb 14, 2020
    mpc

    mpc Member

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    I just ordered one from TA Performance. $59. Thanks for the help.
     

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