no_6_oh_no

I think you found your reverse problem. Looks like a piece off the direct clutch apply piston. That will cause reverse to shudder like that as it blows the pressure out.

Rollin' Smoke

well obviously it has something to do with the truck shuddering.......but you think its part of a piston? i am not up on exactly how the auto works i have a general understanding but am not a pro!

no_6_oh_no

If its aluminum like you said ad from the first picture, I would guess its part of the direct apply piston or possibly the rear servo. Those are the two pieces that apply when reverse is engaged. Looks like it was broke off something.

The rear servo you can see by dropping the pan. The direct clutch means trans out and pump pulled.

Reverse jacks the pressure way high to hold so anything leaking will cause some problems. The direct clutch applys in drive also so if it feels sloppy or weird at all that would indicate it. The rear servo is a little harder as it only applys in reverse and manual first. Manual first may not show slip as it also has a one way clutch on it that is used in auto first.

If reverse is the only gear that shows any weird behaviour you could test it with a gauge to verify it is loosing pressure.

1uglyranger

Looks more like part of the drum.....it really doesn't matter what it is...take it back to the guy that built the tranny for you, and shove it up his A$$

Rollin' Smoke

i have already talked to him and showed him the piece....he is going to take care of it. just kinda sux that I have to pull it all apart again