Dana 25 Front Axle & Differential Parts for Willys M38A1
Axle Shafts, Hubs, U-Joints & Pinion Bearings for Reliable Power Transfer (1952–1971).
Why the Dana 25 Front Axle in the Willys M38A1 Needs Attention Over the Decades.
The Dana 25 front axle is the factory front axle in the Willys M38A1 and shares many components with the early Jeep CJ models and the Ford GPW. After decades of off-road and street use, this rugged but maintenance-heavy axle shows typical wear patterns: axle shafts and U-joints wear from constant steering movement, seals harden and start leaking, letting axle oil escape and water get in. Wheel bearings lose precision from moisture and inadequate lubrication, steering knuckle bushings develop play, and the pinion bearings in the differential can start making noise if improperly adjusted. Gaskets on the differential cover and drive flange harden over time as well. Anyone driving their M38A1 off-road or restoring one should regularly check the entire front axle for play, leaks, and bearing condition to avoid costly differential damage down the line.
- Axle Shafts & Seals: The left front axle shaft and the matching axle shaft seal ensure play-free power transfer.
- Hubs, Bearings & Studs: The axle hub with right- or left-hand thread, plus the wheel bearing nut socket and matching wheel studs for a secure wheel mount.
- U-Joints & Driveshaft: The U-joint for the axle shaft, the greasable U-joint for the propeller shaft, and the propeller shaft slip yoke.
- Pinion Bearings & Differential Gaskets: The pinion bearing kit for ring and pinion, plus the differential cover gasket for a sealed axle housing.
- Locking Hubs: The manual locking hub set for the 6-bolt mount lets you disengage the front axle when needed.
- Steering Knuckles & Seals: The steering knuckle housing and the steering knuckle seal kit for repair or a complete overhaul.
American Brand Expertise for the Dana 25 Axle.
Wheel bearings, wheel studs, pinion seals and locking hub sets for the Dana 25 front axle come mainly from Crown Automotive – a long-established manufacturer with American roots built for a precise fit on Jeep CJ and Willys M38A1 models. U-joints, pinion bearings and pinion nuts come from original axle manufacturer Dana Spicer, while axle hubs and steering knuckle housings come from Omix – another American brand with a long off-road heritage.
Your Partner for the Dana 25 Front Axle.
Whether it's a single seal replacement, a wheel bearing swap or a complete overhaul of the Dana 25 front axle, we're happy to advise you on bearing preload, king pin shim selection and the correct assembly order, including compatibility questions for the Ford GPW or the early Jeep CJ models sharing the same axle. Your order ships from our warehouse as quickly as possible so you can keep wrenching without delay.