Merchant Automotive Allison Maximum TransmissionsDescription ALLISON TRANSMISSION OVERVIEW The 5 speed and 6 speed Allison automatic transmissions backing the Duramax diesel engines in GM 2500HD and 3500 pickups is a smooth shifting transmission that works very well in stock applications. But the factory Allison transmissions tend to have issues coping with heavy towing and hauling or even mild performance upgrades not to mention serious struggles with high performance modifications. As the go to

Understanding what our performance valve body does vs our Co-Pilot does can be confusing so this is a brief description

You can read and erase codes

All you add is oil and RTV sealant

Mirror Polished

The Yukon Grizzly Locker is the ultimate in locking differentials for street

Performance is one thing but at MBRP we believe that appearance and sound are just as important

Direct Replacement for GM P/N: 97941204

- Easy bolt-on installation and removal makes service quick

203 Degree

Filter Head Spacer & Bolts

Replacement for Mopar part number 52121285aa

Kit Includes: Paper and Rubber Kit With Both Internal and External Filters