This adapter assembly fits 19 spline transfer cases.
The adapter kit is designed for exclusive use with the GM 6L80E 2wd versions. GM’s new Hydra-Matic 6L80 transmission is the first of a new family of modular six-speed rear-drive transmissions. The transmissions feature two overdrive gears and a wide gear ratio spread to improve performance and fuel economy when compared with conventional four- and five-speed automatic transmissions. With two overdrive gears, engine rpm is reduced by approximately 9 percent at 60 mph - a reduction to about 1,500 rpm. GM estimates the wide ratio spread can help cut 0-60 mph times by as much as 7 percent and enhance fuel economy by up to 4 percent.
Our kits can use the 2WD transmission with a 6.75" output shaft with long spline stickout, however; the shaft will need to be cut or shortened to 3.80 cut off. This casting is designed for the stock 4WD output shaft.