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Choose your Engine for your 1981 GMC K1500

6 Cyl 4.1L 8 Cyl 5.0L 8 Cyl 5.7L

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1981 GMC K1500 Differential - Rear 6 Cyl 4.1L Eaton

28 Spline; 1.20 in. Axle Shaft Diameter; 2.73 And Up Ring Gear Pinion Ratio; 8.5 in. For Axles w/Small bearing Bores Race O.D. 2.89 in. LM102949/LM102911 Req.~Axles w/Large Bearing Bores Race O.D. 3.06 in. LM603049/LM603012 Req.
Detroit Truetrac® Differential; 28 Spline; 1.20 in. Axle Shaft Diameter; 2.73 And Up Ring Gear Pinion Ratio; Rear; 8.5 in.;
Detroit Truetrac® Differential
Features:
- Helical Gear Limited Slip Differential
- Optimized Torque Bias Ratios Deliver Max Acceleration And Handling
- Automatic Engagement
- Works In Forward And Reverse
- Ideal For Most Vehicles
- Durable
- Smooth
- Quiet Operation
- No Special Lubrication Or Friction Modifiers Needed
The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle.

Additional Fitment Information:

Vehicle	Block	CC	Position	Engine	CID
1981 - GMC K1500	L	-	Rear	6 Cyl 4.1L	250

2 In Stock

Limited-Time Offer

$1,196.86 USD

$1,436.23 USD

1981 GMC K1500 Differential - Rear 6 Cyl 4.1L Eaton

30 Spline; 1.30 in. Axle Shaft Diameter; 3.73 And Up Ring Gear Pinion Ratio; Also Fits GM Half Ton Truck
Detroit Truetrac® Differential; 30 Spline; 1.30 in. Axle Shaft Diameter; 3.73 And Up Ring Gear Pinion Ratio; Also Fits GM Half Ton Truck; Rear;
Detroit Truetrac® Differential
Features:
- Helical Gear Limited Slip Differential
- Optimized Torque Bias Ratios Deliver Max Acceleration And Handling
- Automatic Engagement
- Works In Forward And Reverse
- Ideal For Most Vehicles
- Durable
- Smooth
- Quiet Operation
- No Special Lubrication Or Friction Modifiers Needed
The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle.