Hey, here's something rather fun that happened today. I have a 01 deville northstar 4t80. Had a 1860 tcc open or short. so today I replaced that tcc solenoid and the pc solenoid while I was in there. Went well, was working great, no codes good lock up. I'm on the highway in 4th and lock up, then it redlines. coast over to the side of the road. Not making any bad noises, no reverse or any forward- in drive or any manual gears.Could it be a broken oil pump shaft? Does that sound like my problem? or is it used tranny time? the level is low I notice but..
thanks for any tips!