Hello all. '94 LX Auto trans, F22B2, 135K miles. Car has suddenly developed a 'clunk' that is at wheel rotation speed (one clunk per rev). It starts at ~15 mph, and it persists while coasting in Neutral (i.e. I don't thnik it's the transmission.) Seems louder while at cruise/constant power than while accelerating. It is not present in reverse. Strong enough to be felt slightly through the floorboard. Listening from outside, it seems to be coming from left (driver) of centerline. It is constant while turning or driving straight.

FWIW, I recently did front rotors and bearings (and pads). But car drove great for two weeks with no symptoms. Possibly a red herring.

I suspect it's either intermediate shaft or drive shaft/CV. Is there any way to tell which one, short of complete tear down of both to parade rest?
If drive shaft is bad, is there an easy way to confirm when it's out? If intermediate shaft- what are the part numbers for those bearings? (it's N/A on HondaPartsNow)

Thanks all for help and suggestions.

 

could be a distorted hub that keeps distorting the rotors, the only way those shafts are going to develop a wobble is if you have an accident

 

Thanks, Holmesnmanny. The car has not been in an accident. The rotors were just too thinned and warped to pass inspection, but warped rotors are par for cold weather+mountainous area here. Bearings were fine, but collateral damage from changing captive rotors.
Looking at the parts drawings, I'm beginning to suspect the intermediate shaft bearings as probable cause. I'm heading out for the weekend, so I'll know more when I tear into it next week.
If anyone has experience with bad intermediate shaft and/or recommendation on replacing driveaxle as a preventative, I'd sure appreciate the input.

 

as there is almost no major force on those bearings they almost never go bad

 

AT cars, save for the Ody,don't have intermediate shafts.
More than likely the inner joint was moved out of its normal range of motion. common enough to fail an older axle like that, or if the axle was allowed to hang from the diff without support can damage the inner tripod joint.

 

Mike, you are exactly right. Replaced left axle (Cardone) and everything is all good. Thanks a million!
There was no intermediate shaft either. Not even the shop manual points that out (or if it does, it's pretty obscure). Also: Drain the trans fluid. The bit about not draining for left driveaxle removal only applies for transmissions w/intermediate shaft.
Of note, the TS guides say if the noise occurs esp. while turning, it's the driveaxle. While that might be true (esp for outer joint) it is not absolute. Mine was constant, straight or turning.