I told the service manager that your dealership will no longer service my 06 monte carlo or my wifes 2012 chevy cruze.That is were we brought both cars. After 3 times taking the monte in for transmission work i am now back to were i was the first time my problems started.Service traction control light comes on then fast hard shifts follow.After the 3rd visit they replace the input speed sensor 7-27-11, as soon as i drive off there lot, pulling out from a red light the car bangs into gear, it has been like that till today. 4-9-13 driving at 35 mph my service traction control light comes back on, and yes, you guess it, the hard fast shifts are back.When i pick my car up in july 2011 i found no evidence of the transmission being drop. can some one answer this one question? can you change the line pressure on the transmission by this reprogramming it? I know a little about cars, so when the service guy is telling you a line of BS its time to go to another chevy dealership.

 

Yes you can increase line pressures through the PCM.

I have it done in my Monte for quicker faster harder shifts.

 

probably not the transmissions problem. my 06 did that for a long time when it was running lean. for whatever reason if its not running right it shuts off the traction control. when it shuts off the traction control it shifts hard. for starters, do you have nay check engine lights on?

 

That could be the reason why the car bangs into gear after sitting at a light, they could have turn down the line pressure down a little too solve the fast & hard shifts. There is no check engine light, only the service traction control light, which is why i do not understand why that is screwing up the shifts in the transmission.Like i said, they replace the input speed shift sensor (NOT) well that is what i think. Cause when it shift fast & hard 2nd gear this about gets skip over into 3rd. I have only put on 10,000 miles from 7-27-11. Well anyway, i will be taking my car at the end of april to another chevy dealer were i know the service guy.