broncodan said:
Hello all, I am currently doing a frame off on a 1976 Bronco. It has the stock C4 trans, and I am just wondering if that is a good option, or if I should try and do something with overdrive. I will spend plenty of time wheelin, but also want to be able to go down the highway. I have a wild horses 5.5" suspension lift, and a 2"body lift. I am going to run either 36 or 37 inch tires. I would like to hear your guys opinions on what the pros and cons of this application are, and what you might recommend.
With a 5" lift and stock wheelbase, there really is not a good OD auto option. AOD/A4OD and 700r4 are all too long to have a good driveline length/angle with a 9" rear end....it may be OK if you had a HP 60 rear....
If you must have an overdrive auto, a chev 700R4 is probably the best option. Even with adapters it is cheaper than build a good Ford AOD. (and I am a Ford guy
) Kincade can tell you eveything you need to know about that swap....
The C4 is a great option (no OD though) it is stong, efficient, and small. You can build them to handle up to 450hp pretty easy and cheap.
For both offroad and Highway, I would say go with 4.56 or even 4.10 in the axles and and an Atlas with your choice of low range. Or a Stack tcase with dual lowranges, or wait for the 4 speed Atlas
My ideal coice would be a C4 with the short dana 300/atlas adapter, hooked to a KluneV, hooked to an atlas. Still shorter than any auto OD and Stronger!!!! plus all sorts of gear possibilities. There is thread on POR about doing exactly this combo....Very cool
For reference in my Bronco I am running the same C4 I had rebuilt in 1989. It has been through 3 tcases and now has an atlas behind it with a 3.8 low. I still run 4.10's in the axles....wish they were a little lower some times, but the dirt roads at 70mph are too much fun to give up
I run 38's on it as well.
