The GM 700R4 main shaft kit is used when replacing a TH400 in model years 1985-91. Once installed into the 700R4, the output side of the 700R4 looks identical to a 4WD TH400 that is being replaced. The adapter kit includes a new output shaft, plastic washer, adapter plate, TH400 gasket, o-ring, metric fastening hardware, and adapter instructions.
Note: This adapter kit is designed around a short NP205 input shaft. If the input shaft length measures 3.50", a spacer is required. We offer a spacer kit, p/n 50-6910.
The adapter assembly fits 1985-91 GM NP205 / NP208 transfer cases that were previously used with a TH400. This adapter assembly requires that use of the original GM TH400 4wd adapter. These GM transfer cases features a 32 spline female input shaft, and a circular-six front bolt pattern.
This kit is designed for exclusive use with the 700R-4 / 4L60 / 4L60E. The overall case length of the transmission is 23.375”, has non-removable bell housing, and a 4 bolt square rear case. Late model 4L60E automatics will have removable bell housing and a 6 bolt hex pattern rear case.
Note: The late model 4L60E automatics will require VSS kit.We manufacture two styles of VSS kit's, 716073 fit model years 1993-96 and 50-0405 fit model years 1997 to current.