STLCRZY

Guys please take a look at the pics and let me know if it possible to use this crossmember and Transmission mount with a TH400 in a 65...are the parts Original?

..and is it possible to bolt a TH350 Transm.mount to a TH400 Transm.....?

joe_padavano

TH350 and TH400 use the same mount. As for the crossmember, if it fits the frame, it will work fine. Convertible crossmembers are narrower than others due to the boxed frame rails.

Run to Rund

64-66 part was a little different from 67. The latter had a slot on the rear vertical instead of two small holes. They are fully interchangeable though.

STLCRZY

Joe,i´m not sure if i understand you correct because my English......... so correct me if i´m wrong:

The TH350 and TH400 Transm Mount are identical,use the same mount location....but where the difference,the height ??

Run to Rund

TH350 and 400 have different GM part numbers. I don't know if they interchange in the aftermarket; Joe P. said that they do. The T400 mounting pad is farther back on the transmission, and that is why the crossmember (common to all engines and transmissions) mounts to the frame farther back. That is why I described the addded :tongues" or mounting pads on the 67 convertible frame, farther back than the pads used by other transmissions.

slowolds

What I had to do............

-Had to drill new holes for the trans xmember.
-Had to fab the xmember to use the trans mount (maybe I had the wrong mount). I had to cut the mounting surface and move it down about 1 inch.
-have the ebrake cable off for now. Not sure what length i need for the new xmember location.
-had to cut 1 inch off of the drive shaft (it would fit but I could not be sure how much space was left without bottoming out). Just to be safe.
-could not get any trans dip sticks to fit (neither the st300 nor a th400). Bought a flexible one from amazon for 32$. works and seals great. It mounts to wherever you want so now it is real easy to get to off the firewall.
-no kick down currently connected. I have no problem doing it manually.
-linkage is currently connected to floor shifter. I did not need to fab any linkage.
-shifter lock and cam are not in use right now and I have range through all the gears.

Run to Rund

You can't just drill new holes on the convertible frame. The cross member mounts on "tongues" welded to the frame, not inside a C section.

joe_padavano

I'm afraid I stand corrected. Even the aftermarket part numbers are different on the rubber trans mounts Anchor 2268 for the TH400 and 2378 for the TH350. They look identical and I know from personal experience that I've used the same mount on both transmissions, but I can't argue with facts. I don't know what the difference is, since they appear to be dimensionally the same.

STLCRZY

Thanks....