Transmission & Drivetrain

As we’re nearing completion on our 2003 Chevy Silverado project, we have just a few more items to cover to make the truck function as good as it looks.

KJ Jones, Jason Gonderman – Authors, Photography Check Out These Other Stories! What Is Diesel Blow-By? What Is Cummins Killer Dowel Pin? What Is CP4 Injection-Pump Failure? Installing Sinister Diesel’s Cummins Steering Box Support As people of the world continue to adapt to a new way of life, we’ve noticed that pickup truck—especially diesel—enthusiasts are spending

What is a granny gear transmission: a question a child might ask but not a childish question. Opinions vary on what constitutes a “granny tranny,” but in a nutshell it’s a manual transmission with an extremely deep First gear ratio that allows the vehicle to crawl along at a super-slow pace akin to that of

It can be argued that there’s no bigger bang-for-the-buck performance upgrade than new axle gears. Auto manufacturers are tasked with building a vehicle that is optimized for both highway efficiency, comfort, and performance. Because of this, there’s going to be a trade-off of some sort. All too often, manufacturers lean toward efficiency over performance. Add

When we first rolled our 2002 Chevy Silverado 2500HD into the bay at PPE Diesel’s shop in Montclair, California, we thought for sure the transmission was toast. Interestingly, upon inspection it was actually in relatively good shape despite likely having more than 200,000 miles on a truck that was pushed hard enough to melt a

There’s an interesting thing about early Chevrolet Silverado and GMC Sierra trucks equipped with the Duramax diesel engine and Allison transmission. From 2001–2005, these trucks were equipped with a five-speed Allison automatic transmission. In 2006, the trucks received a big update, a “new” six-speed Allison transmission. The interesting discovery came after the new transmission was

When we started our 2002 Chevrolet Silverado 2500 Duramax project a couple years ago, we set out with a few goals in mind. We wanted the truck to be reliable, first and foremost. We also wanted to put between 650 and 700 hp to the rear wheels, and we wanted the truck to ride on