The GM NV4500 adapter to the Land Cruiser 19 spline transfer case is 5.875” in length. And the overall length of the transmission and adapter is 18.250”. Adapter material is 356 T6 heat treated aluminum alloy. The adapter has a provision for our heavy duty transmission mount. The adapter kit includes adapter housing, 19 spline spud shaft w/ 31 spline internal, sealed bearing, set collar, gasket, nylon nut, fastening hardware, and adapter instructions.
This adapter assembly fits August 1980 to 1989 transfer cases. The transfer case design was changed to a split-case design configuration with a 19 tooth internal spline on the input gear.
GM 4WD NV4500 (1993-94): During the first two years of the NV4500, Chevy offered this 5 speed with a 6.34:1 1st gear; 2nd 3.44:1; 3rd 1.71:1; 4th 1:1 ratio, and a 27% overdrive. It was also the first year that Chevy changed the bellhousing-to-transmission bolt pattern. This transmission is ideal when converting your vehicle, providing an ultra-low 1st gear. GM, however, only produced this particular ratio during these years. The major complaint of this 5 speed was stiff shifting and noise in 3rd gear.
GM 4WD NV4500 (1995): This transmission is identical to the 1993-94 transmission, except the 1st gear ratio had been changed to 5.61:1; 2nd 3.04:1; 3rd 1.67:1; 4th 1:1 ratio, and a 27% overdrive. The noise and shifting problems had been corrected.
GM 4WD NV4500 (1996-2006): This transmission has the same gear ratio as the 1995 version. Chevy once again changed the bellhousing-to-transmission bolt pattern and went to a larger bellhousing index diameter. This Chevy NV4500 has the same bellhousing-to-transmission bolt pattern as the Dodge NV4500. These transmissions use a GM internal release bearing.
Install Notes: Several adapter kits require you to shorten the existing transmission main shaft while it is still in the transmission case. This is common when a 4WD GM NV4500 is being used. Each instruction sheet gives the exact cut off location.
1981-90 FJ60/62 when using the NV4500 you are required to fabricate a new crossmember.