Post-War 4WD Engineering Rebuild: Premium Transfer Case Solutions for Your Jeep CJ3A.
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 1949–1953 Jeep CJ3A 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 utility 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
driveshaft slip yoke from Omix, high-tensile
input/output yoke nuts from Dana Spicer complete with flat washers, matching Crown shaft nuts, 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 CJ3A 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 CJ3A functional and road-ready.
