Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

Complete Axle Assembly, 3.73 Ratio Posi-Traction

$2,899.89

SKU: RAA435-1872-P

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Overview

The Zumbrota Drivetrain RAA435-1872-P is a remanufactured complete axle assembly for GM 14 Bolt trucks and 1996-02 GM Van 2500 models with a 3.73 ratio and posi-traction.

This axle assembly undergoes a thorough remanufacturing process. All tubes are inspected and straightened to OEM specifications, and housings are tested for wear and cracks. Internal components, including ring and pinion gears, internal gears, clutches, and carriers, are 100% inspected. Bearings, seals, crush sleeves, pinion nuts, and shims are replaced. Housings are cleaned via hydro blasting to restore an OEM finish, and correct rolling torque is established for precision setup and longevity.
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The Zumbrota Drivetrain RAA435-1872-P is a remanufactured complete axle assembly engineered for reliability and performance in GM 14 Bolt trucks and 1996-02 GM Van 2500 models, featuring a 3.73 ratio and posi-traction. This axle assembly is built to meet high standards through a comprehensive remanufacturing process. Each unit features tubes inspected and straightened to OEM specifications, with housings tested for surface wear and cracks. Internal components, including the ring and pinion gears, internal gears, clutches, and carriers, undergo 100% inspection. Critical wear items such as bearings, seals, crush sleeves, pinion nuts, and shims are completely replaced. Furthermore, the housings are meticulously cleaned using a state-of-the-art hydro blasting and rinsing process, restoring them to an OEM finish. The assembly process ensures the correct rolling torque is established using precise inch-pound measurements, contributing to precision setup and extended longevity of the unit. This product is built to order and ships when ready, with options for expedited shipping. A refundable core charge of $1,000 applies, which is returned upon receipt of your old, salvageable part for recycling or rebuilding. Please refer to the provided core return instructions for details.

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 NumberRAA435-1872-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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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