A few days ago I noticed a slightly hard shift between 1st and 2nd, shifting from R to D and or other gears were smooth. Yesterday while driving I begin feeling the trans shifting very hard, after doing some research on the forums, I first looked at the bottom motor mount, it was bad so I replaced it, then I changed the IAT (Aka Air charge temp sensor) problem still there, I even had autozone run a scan and it came back as the IAT sensor. After everything I still have the problem I checked the IAT wires all the way through. Not a pintch. So any advise what to do next? I also checked vac lines on the TB all of them are hooked up and no leaks.

btw The air charge temp sensor part no SU176 from autozone. Is the Air Charge Sensor the same as the IAT sensor?


Proud owner: 2002 Cavalier Sedan 2200SFI LN2 4-speed auto.Slowest compact car, only designed for school and groceries.

try another sensor. You might of got a bad replacement. Clear the codes and report back.

codes cleared, took a test drive and appears to be ok now, one thing I forgo to mention was when I was working on the intake tube, the clip pulled apart the wires for the IAT, i fixed them, I believe maybe the wires were bad at the connector. After fixing that, I havent had the problem. I drove 20 mins without a problem.

Thanks for the fast response


Proud owner: 2002 Cavalier Sedan 2200SFI LN2 4-speed auto.Slowest compact car, only designed for school and groceries.

Just completed another test run, and everything is great. Also replacing the t bone engine mount, I can barely feel the car shifting now.


Proud owner: 2002 Cavalier Sedan 2200SFI LN2 4-speed auto.Slowest compact car, only designed for school and groceries.