M/T Synchro Ring 91-99 & Mazda F150 Reverse Blocker, 33 Tooth . Manual Transmission Component Reverse Gear Blocker Synchro Ring 1991-1999 Ford F-150 or Mazda 33-Tooth Features and Benefits: Manual Transmission Component Reverse Gear Blocker Synchro Ring 1991-1999 Ford F-150 or Mazda 33-Tooth Details: AAP UDA 4: 150 Grade Type: Regular Application Summary: 2004 Ford F-150 Heritage (Liter: 4.2 & Engine(ci): 256 & Cylinder: 6 & Block: V & Bore(in): 3.81 & Bore(mm): 96.8 & Stroke(in): 3.74 & Stroke(mm): 95.0 & Transmission Code: M50D & Transmission Base Gear: 5 & Transmission Control Type: Manual & Drive: 4WD, Rwd / Note: M5R2 Manual Transmission, Synchro Ring, Reverse Gear Blocker, 33 Tooth) 1988-1996 Ford Bronco (Transmission Code: M5R2, R2 & Transmission Base Gear: 5 & Transmission Control Type: Manual / Note: M5R2 Manual Transmission, Synchro Ring, Reverse Gear Blocker, 33 Tooth) 1988-1989 Ford E-150 Econoline (Transmission Code: M5R2 & Transmission Base Gear: 5 & Transmission Control Type: Manual & Drive: Rwd / Note: M5R2 Manual Transmission, Synchro Ring, Reverse Gear Blocker, 33 Tooth) 1988-2008 Ford F-150 (Liter: 4.2, 4.6, 5.4 & Engine(ci): 256, 281, 330 & Cylinder: 6, 8 & Block: V & Bore(in): 3.81, 3.55 & Bore(mm): 96.8, 90.2 & Stroke(in): 3.74, 3.54, 4.17 & Stroke(mm): 95.0, 90.0, 105.7 & Transmission Code: M5R2, R2, M50D, M50D-R2 & Transmission Base Gear: 5 & Transmission Control Type: Manual & Drive: 4WD, Rwd / Note: M5R2 Manual Transmission, Synchro Ring, Reverse Gear Blocker, 33 Tooth) 1988-1999 Ford F-250 (Liter: 4.9, 5.8, 4.6, 5.4 & Engine(cc): 4917, 5753 & Engine(ci): 300, 351, 281, 330 & Cylinder: 6, 8 & Block: L, V & Bore(in): 4.00, 3.55 & Bore(mm): 101.6, 90.2 & Stroke(in): 3.98, 3.50, 3.54, 4.17 & Stroke(mm): 101.0, 88.9, 90.0, 105.7 & Transmission Code: M5R2, R2 & Transmission Base Gear: 5 & Transmission Control Type: Manual & Drive: 4WD, Rwd / Note: M5R2 Manual Transmission, Synchro Ring, Reverse Gear Blocker, 33 Tooth)