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Old 10-28-2006, 04:48 AM
JohnTN JohnTN is offline
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Grease Slung on Floor Pan Above Pinion U-Joint

After driving streetrod 2400 miles with a slight drivetrain vibration I finally checked the driveline angles and found the rearend pinion to be 6.5* up. I was able to adjust this to 2.5* up and the vibration is gone, but while under the car I noticed a swash of grease across the floor pan right above the rearend U-joint/pinion connection like grease has been slinging off of something.

The driveshaft and u-joint are new except for the 2400 miles the car has been driven.

Would vibration have caused grease to sling out or is this an indicator the u-joint might be bad? I haven't noticed any clunking or unusual sounds from the rear.

Should I just pump some more grease into the u-joint grease fitting?

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