'03 GTP with 135K. I was having some occasional slipping, and hum/vibration at about 40 mph and up when I released the accelerator, and erratic hunting. I asked a friend (a cop who owns all GM cars) where he recommends having work done. He sent me to an independent shop. They said I needed a rebuild. I choked up the $1700. Has a one-year warranty. It's been about 3 months, but the first week I took it in for a required re-check and told the guy I thought it still felt a little weird a time or two. Now it's weird almost every day... lurching into 1st after coasting to a stop, strong hunting between upper gears so much that it bucks a bit, and shifting is harsher than the same trans, same miles (not rebuilt) on my '02 Olds minivan.
When I did the test, I told the guy I thought it was off, but of course it didn't do anything on the test drive. Honestly, this guy (not the boss) strikes me as not knowing much. I said one issue I felt was in cold weather... he said "you have to warm it up for at least ten minutes". Ridiculous! Just for kicks, I actually HAVE warmed it up for that long two or three times. No lurch from stop, but other issues persist.
Ok - I HATE haggling, confronting these guys. Is it possible that they didn't do this job at all? If so, can it be proven after 3 months?
Any external components or controls they should have looked at?
I hate this ... and know they'll be jerks when I come back and they don't feel any problems at the moment... like I want to spend my time at their place for fun.
Advice?