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Yukon Gear YPKGM12-P-30 is a replacement spider gear and positraction internal kit for GM 12-bolt passenger car and truck differentials with 30-spline axles. Designed for compatible Yukon Dura Grip and Eaton limited-slip positraction carriers, this kit provides the internal gear components needed to replace worn or damaged spider gears while retaining the existing carrier assembly.
The kit includes two 30-spline side gears, two pinion gears, a cross-pin shaft, roll pin, and spider gear thrust washers. It is a practical rebuild solution when the side gears, pinion gears, thrust washers, or related internal components require replacement but the compatible differential carrier remains serviceable.
YPKGM12-P-30 fits GM 12T truck and 12P passenger car differentials equipped with the specified Dura Grip or Eaton positraction configuration. Clutches are not included. Its application range covers classic Chevrolet and Pontiac muscle cars as well as Chevrolet and GMC trucks, vans, and SUVs using the correct 30-spline GM 12-bolt setup.
Key Features & Specs:
Product Type: Differential spider gear kit
Differential: GM 12-bolt passenger car and truck
Axle Spline Count: 30-spline
Differential Type: Yukon Dura Grip / compatible Eaton positraction
Side Gears: 2
Pinion / Spider Gears: 2
Cross-Pin Shaft: Included
Roll Pin: Included
Spider Gear Thrust Washers: Included
Clutches: Not included
Position: Rear
Service Use: Spider gear replacement and differential rebuilding
Brand: Yukon Gear & Axle
Part Number: YPKGM12-P-30
UPC: 883584160397
Proxy Number: 16039
Fitment:
GM 12-bolt passenger car differential
GM 12-bolt truck differential
30-spline axle applications
Yukon Dura Grip positraction
Compatible Eaton limited-slip positraction
Select Chevrolet Camaro, Chevelle, Nova, El Camino, Impala, Bel Air, Biscayne, Caprice, and Monte Carlo applications
Select Chevrolet C10, K10, Blazer, Suburban, and G-Series van applications
Select GMC C/K 1500, Suburban, G-Series, and related truck and van applications
Select Pontiac Firebird and GTO applications
Select Buick Wildcat applications
About Yukon Gear Dura Grip & Eaton Spider Gear Kits:
Yukon Gear & Axle spider gear kits provide replacement internal differential components for compatible clutch-type positraction carriers. Kits such as YPKGM12-P-30 combine application-specific side gears, pinion gears, cross-pin hardware, and thrust washers needed to service worn or damaged carrier internals. They are a practical option when the Dura Grip or Eaton carrier remains usable but the internal spider gear set requires replacement during a differential rebuild.
