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GM 8.5" and 8.625"

Ring Gear Diameter: 8.5" and 8.625"

Ring Gear Bolts 7/16 X 20 LH Thread: 10

Cover Bolts: 10

Pinion Splines: 30

Carrier Breaks: 2.56/2.73

Axle Splines: 28/30

 

 

GM 8.5" and 8.6" (Old 5 Cut)

New Pinion Bearing Preload (Inch LBS): 14-19

Used Pinion Bearing Preload (Inch LBS): 6-8

Back Lash (0.000"): 6-10

Ring Gear Bolt (Foot LBS): 65

Ring Gear Cap (Foot LBS): 60

 

 

GM 8.5" and 8.6" (New 2 Cut)

 

New Pinion Bearing Preload (Inch LBS): 14-19

 

Used Pinion Bearing Preload (Inch LBS): 6-8

 

Back Lash (0.000"): 3-6

 

Ring Gear Bolt (Foot LBS): 65

 

Ring Gear Cap (Foot LBS): 60

 

 

GM 8.6" IRS (New 2 Cut)

 

New Pinion Bearing Preload (Inch LBS): 14-19

 

Used Pinion Bearing Preload (Inch LBS): 6-8

 

Back Lash (0.000"): 3-6

 

Ring Gear Bolt (Foot LBS): 65

 

Ring Gear Cap (Foot LBS): 60