[GruntedCatalina]

I believe my old flexplatel is going and need a replacement. and wanted to know the teeth count on an old 63 or where I can get the info. I also wondered if the teeth count changed through the years or the bolt pattern of the fly wheel. just so if i do go into town I can get something that will match up if its not the correct year.

[tom s]

What trans does it have?If still the slimjim it is a flywheel and not a flex plate.The only thing that changed on pontiacs is the ring gear location and the crank register diameter.Tom

[GruntedCatalina]

its a TH400 trans.

[tom s]

Is this the one you are using without a adapter on a 63 block?Tom

[GruntedCatalina]

yep. it worked out alright for a little while but its not matching right. probably never did. after the issues i had and after the previous owner, it took its toll on the flywheel so trying to get a correct one.

[tom s]

correct block?