Zf S542 M/T Synchro Ring 1ST & 2ND Blocker . 1st & 2nd Gear Synchro Ring Blocker ZF S542 Features and Benefits: 1st & 2nd Gear Synchro Ring Blocker ZF S542 Details: AAP UDA 4: 100 Grade Type: Regular Application Summary: 1989-1992 Ford Bronco (2nd, 1st) (Transmission Code: MS5-42, S5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket) 1988-1996 Ford F-Super Duty (1st, 2nd) (Transmission Code: S5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket) 1988-1996 Ford F-150 (1st, 2nd) (Transmission Code: S5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket) 1987-1996 Ford F-250 (1st, 2nd) (Transmission Code: S5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket) 1987-1996 Ford F-350 (2nd, 1st) (Transmission Code: S5-42, MS5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket) 1988-1996 Ford F-53 Motorhome Chassis (2nd, 1st) (Transmission Code: S5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket) 1988-1997 Ford F-59 Commercial Stripped Chassis (1st, 2nd) (Transmission Code: S5-42 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: S5-42 Zf Manual Transmission, Synchro Ring, 1st-2nd Gear Blocker, Aftermarket)