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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
A spring was installed in the transmission case worm trail to trap large machining chips, and reduce engine stall complaints caused by the stuck converter lock-up valve in the main control of the transmission. This spring should not be installed in transmissions built prior to 8/21/91.