TREMEC's Medium-Duty Commercial Vehicle Transmissions are designed to provide optimal durability, ease of shifting and low ownership costs.
Available in 5-speed and 7-speed synchronized configurations, these easy-to-maintain transmissions feature a modular end-load case design and positive gear engagement with the patented OPTI-RAIL™ shift rail system.
OPTI-RAIL's unique design gathers all the shift rails between two welded side channels. Each shift fork is attached to an individual rail, and to both side channels. Stress is distributed evenly throughout the structure, providing greater strength. Overall stiffness has been improved by 100%, virtually eliminating shift fork deflection.
TREMEC medium-duty transmissions feature Taper Lok™ shift collars and synchronizers that improve shift quality and performance while helping prolong transmission life. Taper Lok works with the main shaft, drawing the gears into position and locking them firmly in place.