Drivetrain› Differentials and Rear-End Components
Hurst
12TK GM 3.73-UP HCT POSITRACTION UNIT
SKU: H00K 02-125
Moderate — 2–4 hours
Description
Part #: 02-125
Are you stuggling for traction, or just have some terrible noise coming from the GM 12-bolt in your truck Hurst Engineering Limited Slip Differentials offer great traction and strength, but are not overly aggressive for the street. These differentials are 4-spring, composite, clutch-style, limited-slip carriers-with internal gears machined from forged 4320 steel and stronger teeth. These differentials are for GM 12-bolt 30 spline rear ends, and are compatible with 3.73-UP ring & pinion gears. Get rid of that old open differential and upgrade to a limited slip unit!
Features:
- Fits 3.73 Gear Ratio & Up
- Fits 12T GM with 30 Spline Axles
- Composite Clutches for great driveability
- Feature 4320 chromoly spider gears for ultimate durability
- Gears are cut to provide the strongest teeth possible in any terrain
Compatible with 1963-1987 Chevy/GMC C/K Series Pickup & Blazer/Jimmy/Suburban
Fitment
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Specifications
| Brand | Hurst |
| Part Number | H00K 02-125 |
Buy with Confidence
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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