Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

4.10 Ratio 10.5" Ring Gear Rear Axle Assembly

$3,565.99

SKU: RAA435-206B

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Zumbrota Drivetrain RAA435-206B is a remanufactured axle assembly designed for Ford F-350 trucks. This assembly features a 4.10 gear ratio, a 10.5-inch ring gear, and is intended for Single Rear Wheels (SRW) and Cab Chassis configurations.

Zumbrota Axle Assemblies are rebuilt to high standards, with all internal components, bearings, and seals inspected and replaced as needed. The process includes inspection for straightness, cracks, and wear, with precise gear backlash and rolling torque settings for longevity and quiet operation. Housings are cleaned using a hydro-blast and sandblasting procedure.
Show original supplier description
The Zumbrota Drivetrain RAA435-206B is a remanufactured axle assembly engineered for specific Ford F-350 models. This unit features a 4.10 gear ratio and a 10.5-inch ring gear, specifically designed for Single Rear Wheel (SRW) configurations on Cab Chassis trucks. Zumbrota Drivetrain emphasizes precision and reliability in their remanufacturing process. Each axle assembly undergoes thorough inspection for straightness, cracks, and surface wear. Internal components, including ring and pinions, internal gears, clutches, and carriers, are fully inspected and tested. All bearings and seals are replaced, and gears are checked for optimal tooth contact patterns and correct rolling torque. Backlash is set precisely to ensure proper lubrication and quiet operation, with axle tubes verified for OEM straightness standards. The remanufacturing process includes an exclusive hydro-blast rinse and sandblasting procedure for both internal and external parts, followed by a proprietary deep cleaning. This meticulous approach sets a high standard for axle assembly remanufacturing, ensuring durability and performance.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandZumbrota Drivetrain
Part NumberRAA435-206B
CategoryDrivetrain
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy