Drivetrain Differentials and Rear-End Components

USA Standard (Yukon)

8.5in Oldsmobile 31spline 12 bolt (factory 3.08 or 3.23 or Richmond gear ring and pinions).

$957.67

SKU: U018 ZP PGM8.5O-3-31

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Special Order
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Clutch-type limited slip positraction unit for daily driven vehicles and mild off-road use. Maintains tire synchronization, transferring more torque to the tire with best grip. Fits 8.5" Oldsmobile, 12 bolt design, 31 spline, and OEM 3.08 and 3.23 gear sets only.

Fitment

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Specifications

BrandUSA Standard (Yukon)
Part NumberU018 ZP PGM8.5O-3-31

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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