8.6″ AXLE ASSY ’02-’05 GM ENVOY & TRAILBLAZER 4.10 POSI Rear Differential Assembly

GM Envoy 8.6″ Axle Zumbrota Drivetrain has proudly served a nationwide customer base for over 30 years. We offer a complete line of new, remanufactured, OE replacement, and performance manual transmissions, transfer cases, and differentials. Our inventory includes high-quality components for rebuilding and repair, catering to a variety of makes and models of both foreign and domestic passenger cars, SUVs, and light-duty trucks.

Precision-Engineered Rear Differentials

Any company can claim to offer rear differentials, but at Zumbrota Drivetrain, we go beyond just selling a product. We truly understand what it takes to provide a high-quality remanufactured rear differential assembly. For nearly three decades, rear differentials have been an integral part of our business. We never cut corners or rely on marketing gimmicks—our products speak for themselves. Whether it’s for passenger vehicles, off-highway vehicles (OHV), race cars, or pulling trucks, we do them all.

Rear Differential Features: GM Envoy 8.6″ Axle

• Thorough Housing Testing: Housings undergo rigorous testing for surface wear and cracks.
• Complete Internal Inspection: 100% inspection of all internal components, including ring and pinions, internal gears, clutches, and carriers.
• Full Component Replacement: Bearings, seals, crush sleeves, pinion nuts, and shims are all replaced to ensure durability and performance.
• State-of-the-Art Cleaning Process: Our hydroblasting and rinsing process restores housings to an OEM finish.
• Precision Setup for Longevity: Correct rolling torque is established using inch-pound measurements for accuracy and longevity.
• Proper Clearance for Performance: Backlash clearance is correctly set to ensure optimal gear lubrication and noise reduction.

Product Specifications: GM Envoy 8.6″ Axle

• Ratio: 3.42
• Type: Rear Differential
• Ring Gear Size: 8.5 Inch
• Model: GM 8.5
• Ratio Option: GT5
• Wheelbase: 129 Inch
• Capacity: 7-Passenger
• Feature: With Posi-Traction

Compatible Vehicle Models

• 2002-2009 Chevrolet TrailBlazer XL GM 8.5
• 2002-2009 GMC Envoy GM XL 8.5