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Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

Rear Axle Assembly

$2,262.69 $1,923.89 Save $338.80

SKU: RAA435-1215DL

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In Stock
Ships by Sep 13
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$100 Minimum Order
30 Days Return
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Overview

The GM RAA435-1215DL is a remanufactured rear axle assembly. It features a GM 10 Bolt 8.5-inch ring gear with a 3.42 ratio and Posi Traction. This assembly is designed for 1988-1991 GM 1/2 Ton Suburban vehicles with 30 spline axles and 2WD.
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The GM RAA435-1215DL is a remanufactured rear axle assembly from Zumbrota Drivetrain, engineered for precision and reliability. This unit is built around a GM 10 Bolt 8.5-inch ring gear and features a 3.42 gear ratio with Posi Traction for enhanced performance. Each axle assembly undergoes a rigorous inspection process. This includes thorough checks for straightness, cracks, and surface wear. All internal components, such as ring and pinions, internal gears, clutches, and carriers, are fully inspected and tested. All bearings and seals are replaced, ensuring like-new operation. The gears are meticulously inspected for optimal tooth contact patterns and correct rolling torque, set using inch-pound measurements for precise setup and longevity. Gear backlash is also correctly set to ensure proper lubrication and quiet operation. Zumbrota employs an exclusive hydro-blast rinse and sandblasting procedure on both internal and external parts, followed by a proprietary shot-enticed deep cleaning process. This advanced cleaning method sets a high standard for remanufactured axle assemblies, restoring housings to an OEM finish. All axle tubes are inspected to ensure they meet OEM standards of straightness. This specific assembly is designed for 1988-1991 GM 1/2 Ton Suburban 2WD models with 30 spline axles and the GU6 ratio option. It does not include hubs, brakes, backing plates, or axle shafts.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandZumbrota Drivetrain
Part NumberRAA435-1215DL
CategoryDrivetrain

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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