G8 Saga Part 2 - Transmission:
The car was flare shifting when hot since I got it but I ignored it until the oil pressure issue was resolved. I didn't know the condition or level of the trans fluid (no dipstick) so I took it to a local shop for fluid and filter change. I picked it up Friday after work and it felt great. Drove it a little over the weekend and to work on Monday and all was good. Leaving work Monday it flared badly on every up shift and hard downshifts like it was in manual mode until it warmed up. When warm it was perfect. I went back and had the shop pull codes. There were 4 all relating to pressure switches. They said they would do some research and get back to me. Checked a couple days later and still nothing, so I took it to the dealer. Dealer replaced the TEHCM. They called and said it was ready, had been driven twice and was all good. I paid, backed out of the parking spot, put in drive and nothing. Then, loud clunk and the display lit up with a red x and said contact dealer. Pulled back into parking spot, took keys back in and left. They called me the next day saying the Mode Switch failed, which is also internal, but I didn't pay for additional labor just the $40 part...
Picked it up the next day (trans was warm) and it was fine. Next morning it was doing exactly the same thing as when I originally took it to the dealer.
I called back and they said to drive it a few days and see if it learns and gets better. I had a lot going on and didn't have time to drop it back off, so I drove it. Around the fifth day, it got better, only doing the funny shifting for the first couple stop and goes instead of for several miles. Around the tenth day it seems to have fixed itself...
I still need to run it by and make sure there are no codes in it now, but it's working great.
The thing that really sucks about all this is that it's now under a 12,000 mile warranty on the trans work, so I can't install the CAI that I already have or tune it without voiding the warranty. I guess that gives me time to collect headers, high flow cats, and cat-back before it gets tuned
. If funds allow...