For years, old-school Jeepers have been collecting, coveting, and adapting granny-geared transmissions into their Jeeps. In this modern day of computer-aided design and 65-75 mph speed limits, why ...

The GM SM420 manual transmission has been a popular swap in Jeeps for decades, thanks in part to its availability, strength, compact size, adaptability, and impressive 7.05:1 First gear ratio. The low ...

For the last couple years, we've been driving Truck Norris around with a 383 small-block Chevy under the hood and its original four-speed transmission. While that was fun, it's time to get serious if ...