weird sound when shifting

[tim bob]

i was driving my 94 today and noticed a weird sound when shifting. like a little thump.i had my stereo off. is that normal or a sign of a problem?? thanks for any input.

 

[mjorgensen Woodhouse]

Check the trans and engine mounts for tears and also the diff bushings, depending on what end you though the sound was from.

 

[RTTTTed]

Also check the U joints as the most common source of 'thumps'

Ted

 

[Mopar Boy]

At what point in the shift did you hear the noise? During clutch in, clutch out, when moving the shifter???

Robert

 

[gen2lover]

normal for all Vipers.Check the above just in case.

 

[RobZilla]

Yea you're gonna have to explain the sound a little better and give a little better description of where you think it game from (front, back, middle). There's lots of places it could be. Did it happen once or repeatedly???

 

[Chuck 98 RT/10]

My Vipers have been clumping and thumping for 150,000 miles. Since you said it was a "little thump" I wouldn't worry about it.

 

[tim bob]

thanks for all the responces . i took the car out again today. kept my tunes off.i drove it for a hour ride one way.it seemed to be fine.car sat for 20 min. when i was taking off it was more like a vibration like maybe something is loose. than when shifting letting the clutch out its like it shifts fine but soun ds like something is loose.than putting the car away my wife said she heard it like rattle when shifting in reverse she was not in th car she was standing behind the car. hope this makes sense. thanks again car has 35k on it

 

[RTTTTed]

Pull the halfshafts and check the U-joints. Otherwise see if it vibrates a little once you get up around 150mph (U joint should cause small vibration).

 

[RobZilla]

U joints or trans/motor mounts loose.

 

[dave6666]

Mounts. Engine or tranny. Do not rely on a static visual inspection. It will fool you. Put a jack under the oil pan with a wood block and lift a bit. Look for separation. Do the same on the tranny mount.

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[RTTTTed]

With mounts there shouldn't be any movement at light throttle or proper shifting. Any easy way to check mounts is to open the hood, watch the engine for movement, pull the parking brake on and let out the clutch slowly. Try that again with Reverse to check the pass side mount. It is possible that a worn Ujoint could also make noise during this test - but not reliably.

Ted