transmission vibration

[Mallard]

I have a mystery rattle which only happens over small bumps head on. It sounds like the u-joints can't react to the bump fast enough. I've had 3 different mechanics look at it and I still have the mysterious noise. Can anyone point me in a direction of things to look at ??

 

[donsrods]

I would recheck your driveline phasing. The transmission should be aimed down at a certain angle (I shoot for 3 degrees) and the pinion on the rear axle should be aimed up exactly that same amount of degrees.

Don

 

[Duke]

Has the car been on the road long and always done this or has it been on the road and this problem came about over time ? Don is right on the money about 3 that is what I aim for, and sometimes I even get it. Remember not to get tunnel vision on the drive-line, it could something as simple as a loose nut or bolt. Good Luck, let us know what you find.

 

["The Bat" out of hell]

A rattle,hummmm,only in a strait line,,sounds more like sloppy hims or rodends on hairpins.