Yah, let me know how things turn out. It'* very annoying for me as well, so I can sympathize with you on it. I've learned to just ignor it, but if you or anyone else who had this problem and was able to fix it, (mounts not being the issue as in our case), please inform.

You MAY have a transmission pressure control solenoid problem as it is a common problem in a 4T65-E transmission. You may want to go to a trans shop and have them do a pressure test to verify if it is bad.

You could do this yourself if you have a 300 lb pressure gauge.

Now the machanic is saying that the motor mount he put in is defective and he is changing it out for another one. I hope that is the case.

Keep us posted.

No the car still does it, but it only does it when the car warms up, everytime i take the car there when it warmed up there like i see the prolem, then the car sits there for a day then they start it up and shift when the car is cold and it shifts perfectly fine. he replaced the first mount he put in a week ago today, the shaking isn't as bad as it was before but it is still really noticable. i left him a message, i wonder what he is going to say this time. because i think there is something that is wrecking the mounts. like there is something that is shaking bad enough and is wearing the mount out but i have no idea what it could be because he check all the mounts on the car and he checked trans pressere.

Oh man... seems as though you're going through the "mechanic battles" like I did on this issue. I gave up after time and now I just deal with it, but keep me posted on what he has to say. By the way, every year I have to replace motor mounts and I'm convinced this is the reason why.

Ok, he told me that he put some kind of additive in the trans fluid that should help with the shaking. He told me it should take a week for it to take affect completly. He added that i should shift it into all of the gears often untill it stops the shaking. I drove the car about 40-50 miles in the past day or so and the shaking has gone down and the shakin is getting less noticeable. I will find out what he put in the car exactly for all of you that would like to know.

Probably Lucas transmission additive.

It sounds like your mechanic is taking shots in the dark. =/

your most likely right on that, i've done what he said, plus i drove the car over 120miles in the past 2-3days, still does the shaking, i guess i will give it more time, and this week i'm going to do some maintence stuff, like changing the oil and a tuneup and see where that gets me, i doubt it will stop the shaking completly