The GM NV4500 adapter to the Dana 300 is 6.375" in length. And the overall length of this transmission and adapter is 18.745". Adapter material is 356 T6 heat treated aluminum alloy. The adapter has a provision for our heavy duty transmission mount. The adapter kit includes an adapter housing, NV4500 23 spline output shaft, Dana 300 crossmember spacer, special nut, gasket, seal for tailhousing, and adapter instructions.
1980-86 Jeep Dana 300. All 300s use a 23 spline input. Some of the adapters we manufacture include a new Dana 300 input with a different input spline. Therefore, if you obtain a Dana 300 from a salvage yard, please verify the input spline.
This adapter kit is designed for exclusive use with either 2WD OR 4WD GM NV4500 transmission.