710759 Replacement Parts Special Viton O Ring for the Cure Total Cu

The Cure by HD MGI is a specialized seal kit designed to eliminate the common oil leak found at the main drive gear of Harley-Davidson 4-speed transmissions. This kit features a two-piece hardened stainless steel spacer and a Viton O-ring, which creates a positive seal between the spacer and the gear where the original design lacked one. It serves as a direct replacement for several OEM components, including 35171-37, 35070-77, 35070-80, and 35079-82A. The kit includes the spacer washer, spacer sleeve, and O-ring. Because it installs behind the main shaft oil seal, it can be fitted without a full transmission teardown, providing a permanent solution to a decades-old engineering oversight.