About Used Rear Drive Shafts
The rear drive shaft sends power from the transmission or transfer case to the rear axle on rear-wheel-drive and four-wheel-drive vehicles. Worn joints, a bad center bearing, or an out-of-balance shaft cause vibration, and a used shaft is a cost-effective fix.
What a Rear Drive Shaft Does
The rear drive shaft transfers power from the transmission, or transfer case on four-wheel drive, to the rear differential to turn the rear wheels. It uses universal joints at each end, and longer, two-piece shafts add a center support bearing to keep the shaft steady as it spins at high speed.
Signs Your Rear Drive Shaft Is Failing
- Vibration that grows with speed from worn joints or an unbalanced shaft
- A clunk on acceleration or when shifting from a worn universal joint
- A rumble or howl from a failing center support bearing
- A squeak from a dry universal joint, or a bent shaft from impact
What to Check When Buying a Used Rear Drive Shaft
- Check each universal joint for play and smooth movement
- On two-piece shafts, inspect the center support bearing
- Look for a straight shaft with all balance weights present
- Match the exact shaft for your vehicle, transmission, and wheelbase
Common Applications
Rear drive shafts are used on rear-wheel-drive and four-wheel-drive cars and trucks. Universal joints and center support bearings wear over time, and a shaft can go out of balance if a weight is lost or it is damaged.
Related Parts
Frequently Asked Questions
What does the rear drive shaft do?
It carries power from the transmission or transfer case to the rear differential to drive the rear wheels. Universal joints at each end let it flex, and long two-piece shafts use a center bearing to stay steady at speed.
What causes rear drive shaft vibration?
Worn universal joints, a failing center support bearing, or an out-of-balance shaft are the usual causes. The vibration typically gets worse as speed rises.
How do I check a used rear drive shaft?
Move each universal joint to feel for play or stiffness, inspect the center bearing on two-piece shafts, and confirm the shaft is straight with all its balance weights. That covers the common failure points.
Are rear drive shafts interchangeable?
Only the correct shaft for your vehicle, transmission, and wheelbase will fit and balance. Length, joints, and any center bearing are specific, so match it exactly to your application.
