The Marlin Crawler Double Transfer Case Adapter Kit has been a staple of the rock crawler's diet. Dual cases allow lower gear ratios which increase a rigs capabilities on the trail without compromising street performance. Double stock 2.28:1 ratios to get 5.2:1, or use the stock 2.28:1 in the reduction box with a 4.7:1 gearset in the rear transfer case for a final 10.7 when in double low-range.

Brief install notes:
Installing a dual transfer case into a 4-cyl equipped truck requires moving your existing t/case back approximately 6.5 inches. The additional crawl box is installed between the transmission and t/case. All 4-cyl gear driven t/cases are 21-spline except for the 1986-87 turbo, which is 23-spline. 2.28:1 or 4.70:1 gears can be used in any combination in the two transfer cases. The most common choice is a set of 2.28:1 gears in the front box and set of 4.70:1 gears in the rear. When building a transfer case for 4-cyl applications, the stock 21-spline input gear can be used. When building turbo, V6 & V8 applications, we highly recommend using a 23-spline input in the rear t/case. Otherwise, failure of a factory 21-spline input gear is certain. Floorboard and drive shaft modifications are required. The factory crossmember remains in its original position.

Kit Includes:
• Adapter Plate
• Coupler
• Double Roller Bearing Installed
• Cage Bearing Installed
• Shift Fork Key Stock
• Toyota Transmission Output Seal
• Toyota Gasket & Seal Kit
• Hardware