35251-93C "large Bearing" Trap Door for 5 Speed & 6 Speed Big Twin Transmissions

High-torque engines and heavy-duty applications like sidecar use put a lot of stress on your transmission. This Large Bearing trap door from Zodiac is an extra heavy-duty solution CNC machined from solid billet aluminum. It features oversized bearings designed to withstand significantly higher loads than stock, which helps extend the life of your gears and bearings. This is a direct bolt-on replacement for OEM 35251-93C and fits 1988–2006 Big Twin 5-speed transmissions, including Twin Cam models, as well as Zodiac 6-speed overdrive units. It comes with the bearings already installed for a straightforward installation on Dyna, FXR, Softail, and Touring models, ensuring maximum reliability for high-performance builds.