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C4 Automatic

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C4 Automatic Trans

The good old C4 is the best trans to easily get in a Bronco for most people. It's great on the trail and capable around town. For people doing a lot of road driving or wanting an extra gear, the Ford AOD trans is a good option and a lot of guys are making that swap using the Advance Adapters part. Bill Stroppe actually designed the first C4 intermediate housings and was the first to put a C4 into a Bronco.

Web Pages Featuring C4 Automatic Trans
  Trans, X-Case Specs, and Axle Specs
Gear ratios and codes for transmissions, transfer cases and axles on all 1966 - 77 Broncos.
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Klune Under Drive  Pictures
The is a low gear set for rock crawling. Don't know much about it.
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Bronco Neutral Start Switch  Pictures
How to adjust and how to disable the Neutral Start Switch on an EB with a C4 Auto Trans. Nice page.
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AODE (4-speed lock up automatic) Swap into EB  Pictures
The following describes the steps required to install a late model AODE type transmission into an early model Ford Bronco. This transmission replaced the original 3 speed manual transmission.
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Calc Your Cruising RPM
A chart and formulas to help you figure out your highway RPM with different trans and tire combos.
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Matt's Gear Ratio, speed, and RPM finder
A cruise RPM calculator. "Given any 5 of the 6 fields, this DiffGear will compute the remaining one. Overall Gear ratio is automatically computed for all fields."
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Tech Info from Performance Unlimited  Pictures
Good Tech Info on driveshafts, tire fitment, engines, u-joints, and much more.
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