Dana 18 Transfer Case Parts for Willys M38
Seals, Bearings, Shift Mechanism & Yoke Nuts for Reliable Power Transfer (1950–1952).
Why the Dana 18 Transfer Case in the Willys M38 Needs Attention After Decades of Service.
The Dana 18 transfer case in the Willys M38 reliably splits power from the transmission to the front and rear axles, enabling the characteristic four-wheel drive of these early-1950s military Willys vehicles. After more than 70 years in service, many transfer cases show clear signs of wear: seals on the output shafts and shift lever harden and start leaking, housing gaskets lose their tension through age and heat, while bearing cups and driveshaft bearings develop play from decades of load. The shift mechanism with its poppet ball, spring, and shift knob wears from constant use and can make shifting increasingly stiff. Yoke nuts and washers at the outputs can also loosen over time. Anyone driving their M38 off-road or restoring it should check the transfer case regularly for oil loss, play, and shifting behavior to avoid costly downstream damage to the drivetrain.
- Gaskets & Seals: The housing gasket for the front output and the output seal for the output shaft seal the transfer case reliably.
- Bearings & Driveshaft: The bearing cup for the output shaft and the propeller shaft slip yoke ensure play-free power transfer.
- Shift Mechanism: The shift knob for the T84 transmission and the poppet ball for the shift detent enable precise gear changes.
- Yoke Nuts & Washers: The yoke nut at the driveshaft flange and the matching lock washer secure the connection reliably.
American Brand Expertise for Your Transfer Case.
Gaskets, seals, bearing cups, shift knobs, and poppet balls are supplied mostly by Crown Automotive – a name with a long tradition in the American parts market for Jeep and Willys. The propeller shaft slip yoke comes from Omix, and lock washers for yoke nuts are supplied by Dana Spicer – all three brands bring American engineering straight from the USA.
Your Partner for the Dana 18 Transfer Case in the Willys M38.
Whether you need a single gasket, a seal, or a complete transfer case overhaul, we're happy to advise you on torque specs, correct installation order, and the right oil fill quantity, including compatibility questions for related Jeep CJ and Willys MB models. Your order ships from our warehouse as fast as possible, so you can get straight back to repairing or restoring your M38.