Join Date: Sep 1999
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Re: 75 Chief w/401
What don't you like about the Q-Trac? Does it not have the low-range option? You can get a part-time conversion kit for it if you'd like. You could buy a TH-400 to whatever-the-hell-you-want adapter, or you could swap out the transmission and transfercase with any number of other Jeep units. You could also keep your eye out for a stock TH-400/D-20 adapter (more common on CJs than SJs).
The T-18 4-speed manual and TF-727 3-speed automatic would be among the top of my list. If you went with the T-18 you can run a D-20 transfer-case. If you go with the TF-727 you can run a D-300. Both of these transfer-cases are gear-driven and have 4:1 and twin-stick kits available for them. The D-300 has a lower stock gear ratio.
If you change transmissions, don't forget to remove the little bushing/spacer/whatever on the 401's output.