I want very much to know if anyone else has had this problem or can point me to a source where I can get troubleshooting advice. Thanks in advance.

I get an occasional but substantial vibration after the right wheel goes through a puddle or in very, very heavy rain. Here are the details.

The Car
1994 Integra GSR 4DR

The Scenario
Above 40 mph in 5th gear a substantial vibration occurs after the right front wheel goes through a puddle or, in the instance of heavy rain, a pretty constant vibration. The frequency of the vibration seems to be motor-RPM. It slows down when the car slows down. Usually, it disappears at 20-25 mph.

If I disengage the clutch and gas the motor while it's still vibrating, the frequency increases with the motor RPM.

Once it disappears, it may or may not come back later when the right tire goes through another puddle. If it's constent very heavy rain, I must go slow or it will eventually return.

I think, but have not yet confirmed, that the lower the gear engaged when it manifests itself, the lower the speed (mph) is that induces it.

I do not have any lubricant coming from any seals that I can see. Because it persists at the motor-RPM frequency, I've excluded the drive shaft assembly, differential and transmission but not the pressure plate, clutch disc, flywheel or any bearings related to them.