TH400 / 4L80E intermediate sprag and drum with an extra large 36 element sprag. This sprag has 36 elements that are taller and wider then the above sprag. This is 56% more sprag area than the 34 element sprag. 1996 back.
This custom drum assembly is fitted with oversize tool steel inner and outer sprag races, an oversize 36 element sprag assembly, and a custom sprag retaining plate and spiral lock ring. Modified inner race distributes lube oil to the sprag assembly more efficiently. This drum uses factory OEM clutches and steels. This drum has been tested behind engines producing over 2000 horsepower/1800 foot pounds torque.