Dr. Z will be answering your questions about Performance Driveshafts. Check back here for the latest answers:

Q: Should I use Universal Joints that have a Zerk (grease nipple) in the body of the Journal Cross in a Racing application?  

A: In a racing application, the Doctor does not recommend a Zerk Journal Cross because, due to the tapped hole, the Journal Cross could have a shorter life than a non-Zerk Journal Cross.     


Q: If I change Universal Joints, will it affect the balance of the Driveshaft?  

A: Yes,  no two Universal Joints are exactly the same and in a Racing application, the Doctor recommends that after installing new Universal Joints that the Driveshaft always be rebalanced.


Q: If I have a Driveshaft rebalanced, should you remove the old balance weights that were on the Driveshaft originally like you do with a tire rebalance? 

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Last modified: December 27, 2004