Cummins R2.8 to Automatic GM Small Block (Incl. LS) Adapter Kit

Cummins R2.8 to Automatic GM Small Block (Incl. LS) Adapter Kit


In stock (can be backordered)

Adapter kit that fits Cummins R2.8 automatic GM


In stock (can be backordered)


Finally, the REAL solution for mating the Cummins R2.8 automatic GM transmission is here.  Quick Draw Brand has the kit you need to mate the Cummins R2.8 to any GM small-block transmission that is easy to install, cost effective, and works.

The Quick Draw GM automatic transmission kit works with transmissions that were originally mated to  small-block Chevy engines, including all LS-based engines. This means that the TH400, TH350, 700R4, 4L80, and 6L80e will all bolt to this adapter. Designed around installation in short wheelbased vehicles, this kit is the shortest on the market. Thanks to the innovative Quick Draw flywheel housing adapter, the housing is an inch shorter than the stock adapter while being 18 pounds lighter at the same time.  The kit also uses a factory Cummins flywheel /flex plate so no worries about welds coming apart or misalignment between the starter and the ring gear teeth.   The flex plate bolts are easily accessible behind the removable dust cover, making for an installation that bolts together and looks just like factory.

Most adapter kits give you the bare minimum of what it takes to physically bolt the engine to the transmission, but as anyone experienced with engine swaps knows, there’s a lot more to it. Aside from the adapter plate and flex plate, the Quick Draw kit includes a pilot hub for the torque convertor to ensure proper torque convertor alignment. We include a low profile timing cover housing to address clearance issues with the factory Cummins cover as well as a horizontal downpipe to ensure the exhaust system will clear the transmission. These are the kinds of things that other companies leave you to ‘discover’ and then figure out on your own. Here are Quick Draw, we’d rather give you what you need to get the job done quickly and correctly the first time around. Compare our GM transmission kit to the ‘other guys’ and you’ll see that no one offers a more complete, compact, and comprehensive kit to mate an automatic to the Cummins R2.8.

Cummins R2.8 Automatic GM kit Includes:

  • QDB Flywheel housing adapter
  • Cummins Flexplate
  • Horizontal down pipe
  • Torque converter pilot hub
  • Low profile timing cover housing
  • Flex Plate stiffener
  • Dust Cover
  • Bolts
  • New rear main seal


  • Ships same day as order is placed

More Information:

We are available to answer any questions and always offers both Military discounts as well as check, cash, or wire discounts.

Videos of installation:

Here is a promotional video showing the toughness of the bell housings we produce. 

* Some photos showing engine and transmission combination have parts missing that will be included in the kit.

Additional information

Weight30 lbs
Dimensions25 × 25 × 12 in