My automatic transmission wont shift out of second gear, anyone got any ideas? I have been told it is the transmission control module, have also bee told it is the ignition module

SOURCE: my transmission wont down shift

change fluid an filter, if thats not yer problem ya got tranny problems ya need to get checked out by a tranny shop

SOURCE: 2000 pontiac montana wont go into 4th gear

I would be interested in knowing if the thermostat is sticking open. Most Overdrives are prevented from engaging until the coolant temperature is over 177 degress F. Check you temp gauge...does it read Low? If so, change the t'stat, and see if that fixes your problem, or, if that does not help, get a complete transmission FLUSH, BEFORE you go out and get a rebuild. You just might save a ton of money.

SOURCE: 06 pontiac g6 won't shift out of first gear (automatic trans)._

you might want to take that to a transmission shop and it sounds like the tranny is going out

SOURCE: 2006 PONTIAC G6-TRANSMISSION JERKING

I have the exact car w/same exact problem. I was told that ist was the speed sensor, which just so happens to be located inside the transmission w/a $400. repair bill.

SOURCE: transmission wont shift to second gear

The vacume hose on the vacume modulater on the trans mission is nt hooked to full engine vacume or the engine isn't making vacume.The governer will make the trans shift to second anyway at redline but it's preety hard on an old car to redline it just to find out/ It's possible that youv'e got the shift detent cable that hooks to the carb set too tight or it's stuck as if it's floored. with the cable disconnected it should shift out al the way real early as long as thirs vacume on the modulater. Gas mileage freaks that drive around slowly unhook th shift cale so the trans shifts into high gear real early. Not much for passing and acceleration but they get a little bit better gas mileage.