Tranny mount ?'s
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Joined: Sep 1999
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From: illinois
Tranny mount ?'s
Hi, like many other people, I have done the 700 to th-350 change. I am successful in every way except for the transmission mount. my th-350 has the 6" tailshaft, and the original 700 tranny crossmemeber(mount) does'nt support it in the right spot. those of you who have done this swap, how did you mount it?? thank you,
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
I haven't done this to a 3rd gen, but have done similar things and know from my swap experience what can work for you.
You can weld a plate to your existing crossmember to extend the mounting pad under the shorter TH350 mount. Or, you can get a crossmember from an earlier car that had the shorter TH200 tranny, which will bolt into existing holes in your subframe.
Sorry, I let the original crossmember from my '82 go when I had the parts car hauled away.
------------------
82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
You can weld a plate to your existing crossmember to extend the mounting pad under the shorter TH350 mount. Or, you can get a crossmember from an earlier car that had the shorter TH200 tranny, which will bolt into existing holes in your subframe.
Sorry, I let the original crossmember from my '82 go when I had the parts car hauled away.
------------------
82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
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