Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

3.73 Posi Limited Slip Differential

$1,666.89

SKU: RAA435-2111J-P

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The Zumbrota Drivetrain RAA435-2111J-P is a remanufactured complete axle assembly designed for GM 7.5-inch applications. This assembly features a 3.73 gear ratio and includes a Posi Limited Slip Differential (LSD). It is built for 1985-1995 GMC Astro and Safari Vans.

The assembly undergoes a rigorous remanufacturing process, including inspection for straightness, cracks, and surface wear. All internal components, such as ring and pinions, gears, clutches, and carriers, are inspected and tested. New bearings and seals are installed, and gears are inspected for optimal tooth contact patterns and correct rolling torque.
Show original supplier description
The Zumbrota Drivetrain RAA435-2111J-P is a remanufactured axle assembly built to rigorous quality standards for precision and reliability. This unit is designed for GM 7.5-inch differentials and comes with a 3.73 gear ratio and a Posi Limited Slip Differential (LSD). It is specifically engineered for the 1985-1995 GMC Astro and Safari van models. Each axle assembly undergoes thorough inspection for straightness, cracks, and surface wear. All internal components, including ring and pinions, internal gears, clutches, and carriers, are inspected and tested. To ensure optimal performance and longevity, all bearings and seals are replaced. The gears are meticulously inspected for ideal tooth contact patterns and correct rolling torque, with precise setup and quiet operation achieved through proper backlash settings. Additionally, axle tubes are inspected to meet OEM standards for straightness. Zumbrota employs an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary shot-enticed deep cleaning process for its internal and external parts, setting a benchmark for remanufactured axle assemblies. This specific model features a 7.6-inch ring gear, a 3.73 ratio, and includes a cover.

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.

Fitment

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Specifications

BrandZumbrota Drivetrain
Part NumberRAA435-2111J-P
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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