Trans,
X-Case Specs, and Axle Specs
Gear ratios and codes for transmissions, transfer cases and axles on all 1966 - 77 Broncos.
Open in new window: http://www.mmedia.is/~bronco/drivelinespecs.html
Klune Under Drive 
The is a low gear set for rock crawling. Don't know much about it.
Open in new window: http://207.5.94.96/v/
Bronco
Neutral Start Switch
How to adjust and how to disable the Neutral Start Switch on an EB with a C4 Auto Trans. Nice page.
Open in new window: http://w3.one.net/~marc/broncohio/tech/neutralswitch.html...
AODE
(4-speed lock up automatic) Swap into EB
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.
Open in new window: http://www.geocities.com/the_real_mrproject/bronco_trans.h...
Calc
Your Cruising RPM
A chart and formulas to help you figure out your highway RPM with different trans and tire combos.
Open in new window: http://www.classictruckshop.com/gears.htm
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."
Open in new window: http://www.contractrobotics.com/4x4/Gears.html
Tech
Info from Performance Unlimited
Good Tech Info on driveshafts, tire fitment, engines, u-joints, and much more.
Open in new window: http://performanceunlimited.com/driveline.html
