help please
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Joined: Jul 2006
Posts: 165
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From: St.Joseph Mo
Car: 1984 firebird trans am
Engine: 383 stroker
Transmission: th350
Axle/Gears: 10 bolt posi with 373 ring and pini
help please
i just installed my th350 and it has a torque converter from a th400 on it when i went to bolt up the converter to the flex plate my hole wouldnt mach up so im taking it i need a bigger flexplate any idea on what type to get or if i can fix this problem
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Sounds like you've got a large pattern torque converter. They require a 14"/168-tooth flexplate. If you put such a torque plate on, you'll need to change the starter as well.
Tell us more about your combination. You're going to have to drop the transmission one way or the other, but it might make more sense to get a different torque converter, rather than a different flexplate.
Tell us more about your combination. You're going to have to drop the transmission one way or the other, but it might make more sense to get a different torque converter, rather than a different flexplate.
Supreme Member
Joined: Mar 2002
Posts: 4,812
Likes: 0
From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
theres normally two patterns/sets of the three TQ converter bolts on most all plates
i would check for this
good luck
i would check for this
good luck
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
A 153-tooth flexplate won't have the large pattern bolt holes.