keep t150 for 258 or th400

[bravo cj7]

anyone own a AMC 258 i6 / 4.2l with a GM Turbo 400 ? I am contemplating to install my th400 in place of my T-150 but I dont want to swap and be disappointed! any suggestions? thanks

 

[Saddle Tramp]

The GM Turbo 400 was a factory option from Jeep so the right one will bolt up to either the AMC V8 or I6 but in a CJ I think most of them were set up for the Qudratrac system. It is a fairly strong Transmission and can be beefed up. The OEM output shaft from the TH00 to Dana 20 has a 12 spline shaft so to adapt to your stock CJ Dana 20 (assume you have the stock Dana 20 behind your T-150 ) will need a new shaft unless you have the Dana 20 that came with the transmission from the factory and then that shaft is considered weak. The QuadraTrac version has a long output shaft that would need to be changed too should you have that version of the TH400.

 

[Bent]

The GM Turbo 400 is pretty long. It worked in the CJ7 because the QuadraTrac Transfer Case had a dropper rear out put which reduced the drive line angle. If you want to keep the Dana 20 that was coupled with the T-150 , you could use a tf727 out of a Scout with AMC 258 i6 / 4.2l . They are a lot shorter and can be upgraded with the TF904 planetary gear for a 2.74 first gear.