PontiacBonnevilleClub.com

My first thoughts are the front tranny mount or the rear dogbone. Stand in front of the car with the hood up and rock the car back and forth, watching the mount down on the driver front side (below the tranny vacuum modulator). Look to see if the rubber seperates from the metal as the car moves. Then get under the car and look at the dogbone on the passenger side. Give the rubber a look over and check if the rear mount bolt is sliding in the slot.

Get under the car and inspect the two driver's side mounts more closely, particularly the rear. If it's not rubber-on-steel, that could be the issue. The rear mount doesn't have much travel, but can clunk when it wears out.



This is the mount you're looking for for the clunk noise. If that's not it, you're looking at something internal to the trans itself, and need to take it to a trans shop for diagnosis. If that mount is original, it's a prime suspect, and I hope that you find it to be your problem from a financial standpoint.

How much would you say the top of the engine moved? Did you try forward and reverse?

im havint the same problem let me know what the out come is

I don't think it's a TC or flywheel problem. They spin the same direction no matter what gear you're in. Definitely sounds like a mount to me.

WELL I HAVE CHANGED ALL MY MOUNTS AND ROTORS SLIDE PINS ball joints control arm bushings
and i am still hearing it when i take off

Try lubricating the strut mounts by putting a little oil in the top.

And please also check the swaybar endlink bushings. They can make a clunk/pop noise in that situation also.

end links are good and the oil didnt work

Just repaired a similar problem on a 97 Bonne. Check the rear subframe mounts, especially the forward most rear one. You may find that they have rusted out and are allowing the subframe to shift.

Something to check, but not for rust. We don't have rust in Oregon. We don't use salt on the roads, but chemical de-icer and sand instead. On the flip side, if Jeff's car came from a salt state, it might be an issue.

l67se wrote:Just repaired a similar problem on a 97 Bonne. Check the rear subframe mounts, especially the forward most rear one. You may find that they have rusted out and are allowing the subframe to shift.

that was one thing i thought of but didnt think anything of it thank you i will check it and get back to you

You might want to check that out then. Reviewing the issue, I was thinking CV joint getting worn out, mine makes a bit of noise like what you described going from reverse to drive.