transmission or rear end clunk?

[dannyb1990]

Hello all, maybe someone can chime in with any suggestions?

The clunk sound is heard when changing from park to reverse.

I can also hear the same clunk sound when taking my foot off the gas after accelerating. For example, I speed to 60km/hr, then take my foot off the gas and coast. After immediately taking my foot off the gas I can hear the clunk when the transmission shifts. This only happens when I take my foot off the gas totally. If I keep my foot down about 1/4 way, I can still feel the transmission shift but with NO clunk.

Rear diff fluid was changed to amsoil about 2000 kms ago I believe.

 

[aquariuscsm]

Driveshaft carrier bearing maybe,or rear diff u-joint?

 

[spasm3]

universal joints, provided this is rwd

 

[Papa Bear]

What kind of vehicle are you talking about ??!!

My "crystal ball" is in the shop for service .......

 

[onion]

Yes, year/make/model would go a long way in diagnosing the problem.

 

[dannyb1990]

sorry i thought i mentioned it... its a 06 chrysler 300 (rear wheel drive).. also, its not entirely a 'clunk', it could also be described as a 'thump', 'kick'.

 

[another Todd]

Also check for a loose pinion nut, or a sticking driveshaft spline. Sometimes it is just play (possibly excessive) in the driveline. Might be nothing to worry about.

 

[Papa Bear]

Have you owned the car since new?
Did this THUMP begin suddenly ?
When ?
How many miles on vehicle?

probably the Amsoil is eating away the crown and pinion ..... j/k

 

[mechtech2]

First is motor and transmission mounts.
Then of course U-joints.
The rear pinion/ring is unlikely.
But anything can go wrong!