Hello Fellow GPers

I have a 2003 GT, 3.8 no supercharge, 199k, original owner and its in decent shape other than rusted rockers.

Current issue is the trans is slipping, not all the time, but getting more frequent,

I've had it scanned and its throwing P1811 code, I know the trans will need servicing soon.

I'm deciding between having someone rebuild mine or swap it out for a GM certified rebuild trans.

Has anyone here done either of these option repairs and can you share your experience please, more info you can pass along the better.

I've been going to shops for estimates, and they are only offering rebuild or replace, nothing else.
I'm getting pretty wide quotes, anywhere from $2000 to $4000.

I'd appreciate any shop/mechanic recommendations that are experienced with GP's are honest and fair.

thanks for your time
C.