how are your motor and tranny mounts? have you ever changed your tranny fluid? did this start suddenly or gradually?

 

Just bought the car...I think its the engine or transmission mount as I have read other threads that say this is the case if there is vibration in P, R, but not D. They question would be what mount and how hard is it to replace.

Its an automatic and I have to replace the radiator core support and likely the crossmember which I think has 2 mounts.

Anyone have any experience replacing all of this?

 

if your taking the cross member off it's pretty straight foreward. iirc there is a long bolt that runs through both the front and back motor mounts. you'll need to undo these to disconnect the mount on the cross member from the bracket on the engine. then you press out the old mount, and press a new one in, then put it back together.

feel free to correct me on this if i made a mistake.

 

Sorry I don't have the answer for you but I may be able to help you narrow down the possible fixes for you. I have the same issue though it doesn't quite sound as bad as yours. I've had all the motor mounts replaced in the last few years and the tranny fuild replaced.

My money is on the tranny mount.

 

I can feel a thud when I shift into R so there is some movement in either the engine, trans or both.

 

I am having the same issue, I know its related to one of the mounts, just not sure which one....what is the best way to check to see if the tranny mount is bad? Jack it up and look at the mount itself?

 

the mounts are basically a metal ring with a rubber/poly insert that has a bolt running through the rubber insert. if the rubber is cracked or the bolt hole is torn larger than it should be you will know that is the problem. you probably wont be able to see the tranny mount from below the car, and there are a ton of wires and intake tubing above it from the top. you may have to pull out your intake airbox and some tubing to get a good look at it.

 

Kramer, peek at the front & rear mounts. Judging by your rust bucket, they're probably torn, or that front lower frame rail you need to replace is flexing!

 

as far as testing to see if the motor mounts are bad is it back and forward motion or up and down motion that will be some indicator that they are bad....I inspected 2 of the mounts today and they appear to be fine from what I can see.

 

Well if you look at the mounts and see the rubber is severed, thats sort of a dead give away

 

mount replacement

how hard is it to replace the front and rear mount on the P11?

Im having the same vibration, thud problem.

 

front mount is easier than the rear mount