Grand Prix speedometer jumping and stalling
#1
Grand Prix speedometer jumping and stalling
Hi, I have an 08 Grand Prix GXP with just under 100,000. The problem I’m having is the speedometer jumps when I come to a stop or I am going under 30 mph. My car also stalls occasionally when this happens. I replaced the speed sensor, the battery, and the alternator and nothing has solved the problem. Any help would be much appreciated.
#2
Unfortunately, it's probably your torque converter/transmission failing. I have an 06 gxp that's been through two trannies now The first time it blew it would do this pretty badly, sometimes the speedo would jump to 50+mph while at a light. If you have more questions I'd jump in the ls4 forum section, lots of good info and super knowledgeable people there..
#3
I bought the car with 50k on it with a bad trans and had it replaced. I’ve only put 43k on it. I knew they didn’t last long but I figured I’d get more than that out of it.