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Home > GM 8.5" O-Type (Oldsmobile)
 
GM 8.5" O-Type (Oldsmobile)
12 bolt cover with 8.5" ring gear. 

Uses 28 or 31 spline bolt in (non C-clip) axles.

Ring Gear Diameter:  8.500"
Cover Bolts:  12
Ring Gear Bolts:  10
Axle Spline Count:  28 / 31
Carrier Breaks:  2.78 / 3.08 - 3.23 / 3.43
Rear Suspension:  Solid
Pinion Nut Size:  1-1/4"
 
 Featured Products
GM 8.5
GM 8.5" O-Type Oldsmobile Ring & Pinion Gear Set
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Your Price: $329.00
GM 8.5
GM 8.5" O-Type Oldsmobile / Master Bearing / Install Kit
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Your Price: $140.00
 
 Products (Total Items: 8)
YK GM8.5OLDS-28 - Yukon Master Overhaul kit for GM 8.5
YK GM8.5OLDS-28 - Yukon Master Overhaul kit for GM 8.5" differential for Oldsmobile 442 and Cutlass. 28 spline
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Your Price: $307.20
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YK GM8.5OLDS-31 - Yukon Master Overhaul kit for GM 8.5
YK GM8.5OLDS-31 - Yukon Master Overhaul kit for GM 8.5" differential for Oldsmobile 442 and Cutlass. 31 spline
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Your Price: $307.20
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ZK GM8.5OLDS-28 - USA Standard Master Overhaul kit for 8.5
ZK GM8.5OLDS-28 - USA Standard Master Overhaul kit for 8.5" Oldsmobile 442 & Cutlass Differential, 28 spline.
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Your Price: $224.20
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MK GM8.5OLDS-28 - Yukon Minor install kit for GM 8.5
MK GM8.5OLDS-28 - Yukon Minor install kit for GM 8.5" Oldsmobile 442 and Cutlass differential
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Your Price: $146.14
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MK GM8.5OLDS-31 - Yukon Minor install kit for GM 8.5
MK GM8.5OLDS-31 - Yukon Minor install kit for GM 8.5" Oldsmobile 442 and Cutlass differential
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Your Price: $145.14
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YSPCS-030 - 8.5
YSPCS-030 - 8.5" Oldsmobile Crush Sleeve
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Your Price: $31.00
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YCGGM8.5OLDS-12 - 8.5
YCGGM8.5OLDS-12 - 8.5" Oldsmobile 442 & Cutlass 10 bolt ring gear & 12 bolt cover.
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Your Price: $11.89
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YDGGM8.5O-3-28 - 8.5
YDGGM8.5O-3-28 - 8.5" Oldsmobile Dura Grip Limited Slip, 28spl; Composite Clutches
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Your Price: $763.00
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