Built to Hold
Build guides, transmission tech, and install notes from the Gearstar shop floor. Every unit we ship is assembled by one builder, matched to your combo, and dyno-tested before it goes out the door. This is where we show the work: what holds, what grenades, and how to spec it right the first time.
How to Trick the 4L80E
Many drivers take components that work in unison, which allow them to pull the gear shifter of their vehicle into drive and reverse everyday, for granted....
Tested Diesel Tough
Gear Star Builds a Bulletproof 4L80EBy Kevin Wilson Before the advent of the Allison automatic transmission in diesel-equipped GM vehicles, the toughest...
Overdrive Transmission Swap
by: Terry McgeanThe trappings of modern technology can spoil even hardcore authenticity buffs. Sample something new, and before you know it, you can't do...
Y-Block AOD Upgrade
More Evolution with Less Revolutions Text and Photos BY John Gilbert As time rapidly moves farther and farther away from the 20th century mark, more and...
Project Get Shorty
A few months back we took a trip up to Smeding Performance in Rancho Cordova, California, and followed along with Ben Smeding as he assembled their new...
Replacing the old TH400 with Level 3 4L60
Some things have been commonplace for too long. Times are changing, an some of it is for the best. There probably aren't too many people out there faced...