To use a C-4 or C-5 out of a car or truck other than the Bronco you have to use the Bronco tail shaft which means taking apart the tranny to swap them. It is far easier to use a complete C-4, flex plate, convertor, t-case input shaft, all misc. bolts, intermediate housing, and auto starter straight from an EB! Since this is often a source of confusion, it is repeated below:
The Early Bronco had some transmission parts that were specific to this vehicle. You must use the correct part for a proper conversion.
The steps for the conversion are:
- Follow manual directions for removing t-case and tranny. Make sure and insert the special tool for the manual tranny when seperating the 3-speed from the intermediate housing. Remove the fly wheel and dust cover. Note that you can make this tool by bending a piece of all thread and putting a couple of washers and nuts on it. (Thanks to Leland Wilson for this tip and much of the technical consulting that went into this article).
- Remove the bolts holding the t-case and intermediate housing together with the t-case sitting vertical, input shaft pointing straight up to keep the t-case bearings from dropping into the t-case.
- Remove the intermediate housing.
- Remove the input shaft to the t-case if it didn't come out with the intermediate housing. Note: the manual intermediate housing has a bearing retainer lip built into it, unlike the intermediate housing for the auto.
- Remove the C-clip holding the input gears to the input shaft. (It's not as easy as it looks!)
- Install the input gears onto the t-case input shaft from an auto.
- Install the input shaft into the bearing retainer.
- Install seal into bearing retainer. Put o-ring on bearing retainer and install intermediate housing to t-case.
NOTE: You'll need to have the t-case linkage bolt hole drilled larger if you have a T-shift t-case and want to keep it.
You can either install the auto and t-case together or seperately. The rest is just a matter of hooking up the cooler lines, cooler, shifter, etc.