This kit will adapt a TH400 2WD automatic to the GM NP205 transfer case and only be used when replacing a SM465 4 speed manual or a TH350 automatic transmission. The kit includes a new TH400 to NP205 Adapter, 32 Spline NP205 Input Gear, Input Bearing, Input Snap Ring, NP205 Gasket, Adapter Seal and Fastening Hardware.
The NP205 originally coupled to a TH350 has a male 27 spline input. The NP205 is a part time, cast iron transfer case with a figure eight front bolt pattern configuration. This assembly was used in 1971-79 vehicles.
The NP205 originally coupled to a SM465 4 speed manual transmission has a male 10 spline input. The NP205 is a part time, cast iron transfer case with a figure eight front bolt pattern configuration. This assembly was used in 1971-84 vehicles.
The transfer case will need to be machined to accept the larger diameter input bearing that is supplied with this kit.
This adapter kit is designed for exclusive use with the GM TH400 automatic
transmission. The TH400 has a case length of 24.250” and a “Texas-shaped” oil
pan underneath it. The factory output shaft has a spline count of 32 spline and
had various output lengths. The 2wd Slip Yoke Version with an Output Length of
4.5" is required for this Kit (You can also use a TH400 4wd that
originally came with a Fig.8 NP205 1975-1984) **Note: There is a
Pre-Production TH400 that used a 27 Spline Output and the TH350 Bolt Pattern,
this Transmission will not work with this Kit**