Hey everyone I got a 96 LT1 from an Impala SS in my Jeep Wrangler back behind it is a 700r4/4l60. My transmission is being rebuilt due to a cracked bell housing my flexplate is ruined and I'm having a hard time locating the correct plate. The cracked one is a TCI unit I'm thinking was the wrong plate to begin with.
. Every parts store I go to is giving me a flex plate that's got a counterweight on the back that says engine side does this sound correct cuz I did look up TCI and they have one that's internally balanced. Any help would be greatly appreciated.

 

The LT1 flex plate has a “butterfly” weight on it. That weight compensates for the portion of the crankshaft rear flange that was removed to allow the 1-piece RMS configuration.

To the purist, the engine is “internally balanced”. But most people choose to say “externally balanced in the back”. This article explains it - see photo comparing 2-piece and 1-piece flex plates:

https://www.chevydiy.com/1955-1996-c...manual-part-2/

 

Thanks just to be sure, this is the Flexplate I picked up today . From Atp part# z-165

 

OP

if your donor LT1 (96 Impala SS) was stock, not rebuilt, it would be a "rear external balance" motor requiring the flexplate with the weight on it.

Typically rebuilt motors are "internal" aka zero balanced motors where you would use a flexplate with no additional weight attached to it.

 

Looks like the correct fit. I would question the quality of a $30 flex plate. I have a B&M SFI-rated plate and it cost 4X that price.