1. Verify that the joint shaft is not twisted or cracked.
2. Turn the joint shaft by hand and verify that the bearing rotates smoothly and freely.

Drive shaft
Joint shaft removal/installationMazda 6 Service Manual: Engine disassembly/assembly
1. Disconnect the engine and automatic transaxle. (ATX) (See AUTOMATIC
TRANSAXLE REMOVAL/INSTALLATION.)
2. Disconnect the engine and manual transaxle. (MTX) (See MANUAL TRANSAXLE
REMOVAL/INSTALLATION.)
3. Remove the intake-air system. (See INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION.)
4. Remove ...
Mazda 6 Service Manual: Clutch disc inspection
1. Using vernier calipers, measure the thickness of the lining at a rivet
head on both sides.
Replace the clutch disc if its thickness is less than the minimum.
Thickness
0.3 mm {0.012 in} min.
2. Measure the clutch disc runout using a dial indicator.
If the runout is excessiv ...