Howdy yall. I'm in the process of sourcing out parts for my new driveline and I'd like to know what transfer case setups people have had success with. In front of the TC I'll be running a wide ratio ZF 5 speed transmission (5.7 granny first) and a cummins 4BT motor. I'd like to have a dual case setup without doing a rear end stretch. Anybody done that on here?
I know there are underdrive setups like the klune or blackbox that would most likely fit, but I'd rather not fork out that much cash at the moment. Don't really wanna buy an Atlas either.
Here's a few setups I've come across, I just don't know if they will fit:
I think the shortest ones are the 203/205 and 203/d300 (with flip). Are there any other options out there that I am unaware of? If not, which is better between the 205 and d300? I know the d300 is more upgradable, but the ford 205 has larger splines. Any thoughts would be much appreciated!
Correct mr if im wrong, but i believe a 203/205 doubler is 17.5 in long. Stock 231 is 18.5 in. Granted my 231 is shorter now with the super short sye. So im only looking at a change in length of +- 2 in.
Also, i think (havent picked up the new zf) the zf 5 speed is shorter than an ax5.
With that said, i know a d300 isnt too far off in size wise to a 205, but the d300 has lower gearing, and can be upgraded to 4-1 later on if i wish.
The 231 can be upgraded to 4:1. Look at mine! If you want super low gears go with an atlas. You can get reduction down to 10:1 and it's gear driven and not chain driven. With more horsepower comes greater risk for breakage. Keep your driveshaft long and your transfer case where it's supposed to be.
I'm not positive but when I was looking at upgrading my tcase, I thought I saw that a d300/231 doubler is only a couple inches longer than stock. I'm sure someone can chime in and correct me. Haven't done it or looked that much into it, so I don't know.