NV5600 M/T Synchro Ring Blocker, Brass . NV5600 Fiber Center Blocker Brass Synchro Ring NV22760 2nd Design Center Blocker Ring 6 Tabs Smooth between all 6 tabs Features and Benefits: NV5600 Fiber Center Blocker Brass Synchro Ring NV22760 2nd Design Center Blocker Ring 6 Tabs Smooth between all 6 tabs Details: AAP UDA 4: 100 Grade Type: Regular Application Summary: 1998-2005 Dodge Ram 2500 (Transmission Code: NV5600 & Transmission Base Gear: 6 & Transmission Control Type: Manual / Note: NV5600 Center Synchronizer Ring, 2001-05 style synchro rings that are smooth between all six tabs, If original rings have bumps between every other tab the gear must also be updated to the 2001-05 style, NV5600 Center Synchronizer Ring, 2001-05 style synchro rings that are smooth between all six tabs) 1998-2005 Dodge Ram 3500 (Transmission Code: NV5600 & Transmission Base Gear: 6 & Transmission Control Type: Manual / Note: NV5600 Center Synchronizer Ring, 2001-05 style synchro rings that are smooth between all six tabs, If original rings have bumps between every other tab the gear must also be updated to the 2001-05 style, NV5600 Center Synchronizer Ring, 2001-05 style synchro rings that are smooth between all six tabs)