NOTE: ARP is currently EXTREMELY backlogged. This is causing a price increase for their fasteners, and can absolutely affect lead-times of these adapter kits. I have limited quantities of hardware left, and they are out till July on certain fasteners, so if you are planning a spring project, you are best to get your order in ASAP. If you would like to confirm inventory before ordering, please call 402-367-2346.

These parts are now anodized. You can select your preference for gold or clear. If a color is out-of-stock, the other color will be shipped. 


The OM617 to AW4/32RH Adapter Kit will mate your OM617 donor motor to an automatic AW4 or 32RH found behind the Jeep 4.0L engines. This kit is NOT designed for the automatics found behind 2.5L engines. The kit includes:


-Aluminum Adapter Plate

-Starter galvanneal spacer

-Crankshaft adapter

-New flexplate washer

-All necessary hardware


You must have your flexplate machined to the new 6-hole crankshaft pattern. A PDF will be emailed to you after purchase. This is typically a $50-$75 service. Doomsday Diesel can also machine your flexplate for you if you want to ship it.




It is highly recommended that you mark the posiiton of your OM617 flexplate in relation to your crankshaft before removing. You may then have your flexplate match-balanced to the OM617 flexplate.

Custom ARP bolts are uitilized for the crankshaft spacer and flexplate.


AW4 Dowel Sleeves available here:

OM617 to AW4/32RH Adapter Kit