USA standard Manual Transmission M5R2 3rd & 4th Fork 1988-1996 Ford F-150/Mazda. M5R2 M/T 3RD & 4TH FORK 88-95 FORD & MAZDA F150 .. USA Standard Gear manufactures a full line of top-quality transmission parts. You can count on USA Standard Gear to fulfill all your transmission, differential, and general replacement part needs.