[Xflair89]

So here is the summary:

Basically my 3.2l 2003 Cadillac CTS (116k miles) has a bit of a problem. Firstly, it seems idles around 500-600rpm and causes the body to shake. Cleaned out the throttle body, new air and fuel filter, but the problem persists. Not sure why it idles that low, but is that the normal idle range?

Secondly, when coming to a stop, it almost always hard shifts into 1st gear. Like a hard jerk. This normally happens when the engine is cold, but happens less when it warms up. The rest of the gears shift perfectly, but that hard shift into first is a problem :hmm: To circumvent this, I activate snow mode, so it doesn't shift into first but thats not a fix.

What should I do? I was considering a transmission flush but I have been reading that this may even cause more problems. Any thoughts on this? Thanks :wavehi:

 

[arw1510]

I would suggest checking for any misfires and also getting your motor mounts checked.

 

[Xflair89]

I would suggest checking for any misfires and also getting your motor mounts checked.

Thanks for the response! Yea i will check that issue with the shaky idle, but what about the hard downshift into first? Any thoughts on the issue? Bump

 

[arw1510]

Thanks for the response! Yea i will check that issue with the shaky idle, but what about the hard downshift into first? Any thoughts on the issue? Bump

Could be caused by both of my suggestions. More so the motor mounts. Many people confuse a hard downshift with the motor jumping. If the mount is broken the torque that is created doesn't all go through the trans to the wheels. The motor will bounce up or down. First gear is the easiest this is felt