Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

Rear Axle Assembly 3.55 Posi Traction

$2,798.34

SKU: RAA435-124A

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

Moderate — 2–4 hours

Overview

The Zumbrota Drivetrain RAA435-124A is a remanufactured 9.25-inch rear axle assembly. It features a 3.55 gear ratio and a Posi traction differential. This assembly is designed for 2007-2008 Dodge Ram 1500 4WD models. It includes a square brake mounting flange and is equipped with Electronic Stability Program (ESP).

This axle assembly undergoes a thorough remanufacturing process. All tubes are inspected and straightened to OEM specifications, and housings are tested for surface wear and cracks. Internal components, including the ring and pinion, gears, clutch, and carrier, are inspected 100%. 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.
Show original supplier description
The Zumbrota Drivetrain RAA435-124A is a remanufactured 9.25-inch rear axle assembly, engineered for 2007-2008 Dodge Ram 1500 4WD vehicles. This unit comes equipped with a 3.55 gear ratio, a Posi traction differential for enhanced grip, and a square brake mounting flange. It is also compatible with Electronic Stability Program (ESP) systems. Each axle assembly features tubes straightened to OEM specifications and housings tested for integrity. Internal components like the ring and pinion, gears, clutch, and carrier are subjected to a 100% inspection. Critical wear items, including bearings, seals, crush sleeves, pinion nuts, and shims, are systematically replaced. The housing is cleaned using a state-of-the-art hydro blasting process, restoring its original finish, and precise rolling torque is set for optimal performance and extended service life. This assembly is specifically designed for Ram 1500 models from 2007-2008. It excludes hubs, brakes, backing plates, and axle shafts, requiring these components to be supplied separately. The product is built to order and includes a refundable core charge of $1,500, which is returned upon receipt of your salvageable old unit.

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 NumberRAA435-124A
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