This is a heavy duty 34 element sprag for a TH400 transmission.
It is 100% stronger than stock and will eliminate or prevent
sprag failure. Some 1971 and later may also require a direct
drum change to install this sprag
Increase Your Torque
The only way to go when building a transmission for heavy-duty or performance use. Prevents the outer race from stripping out the delicate splines in the case. This is a must-have for heavy-duty or performance transmissions.