Bought a new torque arm for my 82 camaro 406 700r4. Read on the jegs website that i need a 85 or newer torque arm mount “clamshell mount”. Got one off a 99 doesnt fit. I would start drilling holes to make it fit but dont want to mess up pinion angle. Any advice?

 

Just buy the new correct bushing. They aren't expensive.

 

The right later "bushing" should fit a stock shell as stated above.

Is there any chance the '99 mount you got was from a manual?

 

Exactly in what way does it "not fit"?

A manual one won't fit an auto trans or vice-versa. In the 3rd gen there's also the difference in which way the TA stamping faces (no idea whose brilliant idea that was): it can either be a "3" vs an "E". (or "W" vs "M") Not sure if the 4th gen has that as well but I kinda don't think so.

 

I don't know what you've got ( the Torque Arm or the bracket) but from what you posted; it sounds like you'll need the 82-85 brackets and bushings. POST SOME PICS so we can give you the best advise based on facts and we're not guessing !!!

The earlier design bracket has a "notch" in it and I'm pretty sure the 86+ bushings will not properly fit in the earlier 82-85 brackets. While this pic shows T5 brackets,... I'm fairly certain the auto brackets are made the same way (with a notch ). 82-85 on the LEFT ( Torque Arm "lips"facing pass side) and 86+ on the RIGHT. (Torque Arm "lips" facing the drivers side. )

 

Just wanted to point out that you guys forgot to put quotes around "bushing" like jmd did. Don't know why, but he feels we need quotes.