Tools Required

J 7872  Magnetic Base Dial Indicator Set. See Special Tools and Equipment .

Fig 1: Bolts & Bolt Holes Of Threadlocking Material
Courtesy of GENERAL MOTORS CORP.
1. Clean all bolts and bolt holes of threadlocking material.
2. Clean the components in solvent.
CAUTION: Wear safety glasses in order to avoid eye damage.
3. Dry the components with compressed air.
4. Inspect the hub for the following:
   • Damaged bolt hole threads (1)
   • Damaged snap ring grooves (2)
   • Worn splines (3)
   • Worn or scored surface (4)
   • Worn or damaged bushing
Fig 2: Couplings
Courtesy of GENERAL MOTORS CORP.
5. Inspect the couplings for the following:
   • Loose or damaged inserts (1)
   • Worn, cracking, or deteriorated rubber (2)

     MINOR cracking of the rubber is normal and acceptable. If the cracks expose any frayed fabric or internal windings, replace the coupling.

Fig 3: Propeller Shaft To Driveline Support Tube
Courtesy of GENERAL MOTORS CORP.
6. Inspect the propeller shaft for the following:
   • Damaged bolt hole threads (1)
   • Loose or missing balance weights (2)

     Balance weights may have been installed and removed during the balancing process. In those cases, a weld mark will remain on the propeller tube.

     Inspect the inside of the driveline support tube for a missing balance weight.

   • Loose or damaged snubber (3) - manual transmission
   • Dented or damaged propeller shaft tube (4)
   • Worn, bent, loose, or damaged pins (5)
Fig 4: Propeller Shaft Pins To Flange
Courtesy of GENERAL MOTORS CORP.
7. Inspect the propeller shaft pins for proper installation. The pin should extend beyond the flange 30 mm (1.18 in).
Fig 5: Propeller Shaft Runout At Wooden V-Blocks
Courtesy of GENERAL MOTORS CORP.
8. Measure the propeller shaft runout.
   1. Mount the propeller shaft in wooden V-blocks or between centers on a fixture.
   2. Check the runout of the propeller shaft in multiple locations, including the barrel ends, using the J 7872  . See Special Tools and Equipment .
   3. If propeller shaft runout exceeds 0.3 mm (0.118 in), the propeller shaft is bent and should be replaced.
9. Inspect the snubber - manual transmission - for wear or a flat spot on the outer edge.
10. Check the runout of the snubber.

    If the runout of the outer edge of the snubber exceeds 2 mm (0.79 in), replace the propeller shaft.

Fig 6: Bearing Housing Hub At Bolt Hole Threads & Snap Ring Grooves
Courtesy of GENERAL MOTORS CORP.
11. Inspect the bearing housing hub for the following:
    • Damaged bolt hole threads (1)
    • Damaged snap ring grooves (2)
    • Worn or damaged splines (3)
    • Worn or damaged bushings

      Bushings that have been removed from the hub will be damaged and should not be reused. Install NEW bushings during assembly.

Fig 7: Flexplate Spindle - Automatic Transmission
Courtesy of GENERAL MOTORS CORP.
12. Inspect the flexplate spindle - automatic transmission - for the following:
    • Damaged bolt hole threads (1)
    • Damaged snap ring grooves (2)
    • Worn or damaged splines (3)
    • Damaged threads (4)
Fig 8: Input Hub - Automatic Transmission
Courtesy of GENERAL MOTORS CORP.
13. Inspect the input hub - automatic transmission - for the following:
    • Worn or damaged splines (1)
    • Damaged bolt hole threads (2)
Fig 9: Bearing Housing At O-Ring Or Snap Ring Grooves & Threads
Courtesy of GENERAL MOTORS CORP.
14. Inspect the bearing housing for the following:
    • Damaged O-ring or snap ring grooves (1-2)
    • Damaged threads (3)
    • Worn or scored bearing bores
Fig 10: Snap Rings & Bearing To Hub
Courtesy of GENERAL MOTORS CORP.
15. Inspect the bearings for the following:
    • Damaged grease seals
    • Excessive wear or roughness of operation

      Bearings should rotate freely with no coarseness or rough feel

16. Inspect for bent or broken snap rings (1), replace as required.
17. Inspect the driveline tube for the following:
    • Damaged bolt hole threads
    • Damaged front O-ring groove
    • Worn or scored front bearing bore
    • Missing or damaged bellhousing dowel pins
    • Damage to the exterior of the tube
    • Cracked welds