I have the 4T65-e problem of tranny working fine until I hit about 15 miles and hard shifting starts and it starts to make grinding type sounds. Shut it off and it goes away and thens returns. From what I read in these forums I'll need to fix PCS. I have replaced the TCC in a 125C tranny in an 89 Celebrity and I'm wondering if its the same type of procedure. Side panel? I can't seem to find much about the replacement. Can anybody enlighten me? Thanks Its for a 2000 Lumina

Side cover must come off, which means the axle comes out, you may have to drop the subframe for better access also. I'd do a scan to confirm the appropriate code is pending or set that corresponds to the pcs issue.

Thanks, looks like tranny shop, any idea on prices?

5-6 hours labor tops, plus gaskets and fluid, solenoid about 40.00

Tranny shop didn't think the problem is with solenoid but would fix P1811 problem by "adding metal" to something in the tranny. Its a $1400.00 fix, but the car runs fine for around town runs. Gonna try a external cooler and maybe wire up one cooling fan to keep temps down. Thanks

Gotta disagree with what they propose!!