Trans Mods To Handle Different Power Levels

The increasing popularity of GM’s Duramax powerplant backed by an Allison automatic has prompted a diesel subculture of D-Max enthusiasts. You can find good, used trucks for a decent…

Testing PPE’s deep transmission pan on a ’15 GMC Denali

Diesel transmissions have quite a tough job. As horsepower levels rose on 3/4 and 1-ton pickups, the manufacturers have done a good job at upgrading the factory slushboxes–but…