TH400 and Torqueflite bolt patterns

Do the GM and Chrysler transmissions used in AMC applications have different bolt patterns (than their native counterparts) where they mate to the bellhousings? The shop dyno adapter doesn't mate to the AMC block and an AMC bellhousing  pattern won't mate to it either. Pretty sure their dyno has a GM or Mopar pattern, so wondering if those bells used in AMCs and Jeeps had those bolt patterns at the trannies or if the bolt patterns were unique to AMC.

6PakBee wrote: The AMC Torqueflite pattern is specific to AMC and NOT the same as the Mopar TF.  The GM 400, can't say.  Just out of curiosity, which dyno shop are you using?

GM Turbo 400 as placed behind 1972 up Jeep Truck and Wagoneer with AMC Engine has a specific AMC pattern bolt pattern, exactly like the Torqueflight......all internals are basically the same as each native trans.

Here is a comparison of stock flexplate for late Jeep Th400 and advance adapters kit with a modified 72 on up tranny flexplate. Not tge flexplate will work on both types of torque converters.

The early AMC Borg Warner Automatic Transmissions had separable Aluminum Bell Housings.

Edited by PHAT69AMX - Feb/05/2019 at 5:45pm