Our Advance Adapter 50-6804 will allow you to adapt a GM TH350 3 speed automatic transmission to the Jeep NP231 transfer case. The adapter housing is 1.50" in length and is manufactured from 356-T6 heat treated aluminum alloy. We also supply a mounting provision on the bottom of the housing to bolt-on our heavy duty transmission mount (716008). The adapter kit includes an adapter housing, new 27 spline NP231 input shaft, bearing, gasket, seal , o-ring, fastening hardware and adapter instructions. Note: the new NP231 input supplied in this kit cannot be used with a Tera 4:1 kit.
The adapter assembly will fit either the Jeep NP231 transfer case with a 21 or 23 spline input shaft. This input shaft protrudes from the face of the transfer case 1.19" or 2.12".
Note: the new NP231 input supplied in this kit only fits NP231 model years up to 1994.
This adapter kit is designed for exclusive use with the 4wd GM TH350 automatic transmission. This GM automatic was commonly found stock in vehicles from 1969-81. It was used in both pickups and car applications. The TH350 has an aluminum, 1 piece case and is 21.5" in length. Note: The 1980's version of the TH350 cannot be used with this adapter.