Dana 18 Transfer Case Parts & Upgrades for Jeep CJ2A

Post-War 4WD Engineering Rebuild: Premium Transfer Case Solutions for Your Jeep CJ2A.

The heavy cast-iron Dana 18 solid transfer case (Spicer 18) is the mechanical backbone that defined the legendary, unstoppable off-road performance of the 1946–1949 Jeep CJ2A civilian Jeep. Featuring a highly distinct offset-output layout where both front and rear driveshafts exit on the passenger side of the vehicle, this assembly is subjected to severe radial torque loads during heavy farm and agricultural labor. Over many decades of mechanical wear, storage, or tough trail use, original paper shims and oil seals inevitably degrade, causing severe gear fluid leaks and drivetrain play. Our specialized online inventory features professional-grade replacement hardware to successfully rebuild and seal your vintage gear-driven transfer case back to factory standards.

Authentic Engineering for Historic Drivetrains: Crown, Spicer & Omix.

For full-scale mechanical overhauls and a leak-free assembly, we stock a comprehensive selection of professional-grade seals. Re-seal your casting seams perfectly with transfer case housing gaskets, front output cover gaskets, and shifter shaft oil seals from Crown Automotive, paired with precision oil pan cover gaskets from Omix. Eliminate drivetrain growl and bearing play effectively with premium replacement output shaft bearings, packed complete with heavy-duty bearing cups and output oil seals.
Secure your mechanical connection and stop driveline play with the precision-machined rear driveshaft slip yoke from Omix, high-tensile input/output yoke nuts from Dana Spicer, matching Crown shaft nuts, Spicer yoke flat washers, and Crown main shaft lock washer plates. We also restore crisp functionality to the classic twin-stick cockpit controls, supplying replacement shift rail detent springs, mechanical interlock balls, and factory-correct shift knobs from Crown to preserve that showroom look inside your cabin.

Expert Support for Your Historic Jeep CJ2A Transfer Case Rebuild.

Rebuilding a gear-driven Dana 18 transfer case and setting the correct intermediate shaft bearing preload requires technical accuracy and historical specification knowledge. Our outstanding customer service is here to guide you through selecting the correct internal thrust washers, small hardware shims, and gaskets tailored to your specific post-war production year. With our fast shipping, your replacement drivetrain parts will arrive quickly, keeping your classic Jeep CJ2A functional and road-ready.