Product Description
Build your own rebuild kit for the NV4500 manual transmission. Three GM kit versions: 1992-95 EXTERNAL clutch slave (1992-94 = 6.34 first gear, unsynchronized reverse; 1995 = 5.61); 1996-99 INTERNAL slave, no reverse synchro; 1999-2007 INTERNAL slave WITH reverse synchro (1999 overlaps - check for reverse synchro/clutch cone). Pick the overhaul kit that matches your case, then add only the parts you need.
Build your own NV4500 rebuild kit: choose the parts that match the transmission on your bench and leave out what you don't need. This builder has 10 option groups and 35 choices, all optional, so the kit holds only what you pick.
What you can choose
- Choose Your Overhaul Kit: BK308CWS 1999-2007 internal slave WITH reverse synchro - kit with synchros; BK308BWS 1996-1999 internal slave, no reverse synchro - kit with synchros; BK308B 1996-1999 internal slave - kit without synchros; BK308WS 1992-1995 external slave - kit with synchros; BK308 1992-1995 external slave - kit without synchros
- Add 5th gear nut fix: 334795BK Updated 5th gear nut kit - GM
- Add 5th gear: 334585-1AK 5th countershaft gear kit 51T w/ slider, keys & springs - 5.61 units (1995-up); 334585-1 5th countershaft gear only, 51T - 5.61 units (1995-up)
- Add 5th gear (2): 334585-2 5th mainshaft gear 22T, 31 internal spline - 5.61 units (1995-up)
- Add 5th synchro ring & slider: 334705 5th synchro ring; 334644 5-Reverse slider (already included in 334585-1AK - do not pick both)
- Add Synchro rings & assemblies: SRK308A Synchro ring kit WITH reverse synchro - 1999-2007 reverse-synchro units only (skip if kit is WS); SRK308 Synchro ring kit, NO reverse synchro; 334701K 1-2 synchro assembly (complete); 334642K 3-4 hub & slider kit; 334703 3-4 synchro ring, brass; 334587-2 Reverse clutch cone (mainshaft reverse) - 1992-1998
- Add Shift forks & pads: 334841 1-2 shift fork; 334843 3-4 shift fork; 334845 5th shift fork; 334847 Reverse fork - early, push/twist top (1992-96); 334847A Reverse fork - late, square-bolt cover (1996-up); 334846-1 Reverse fork insert
- Add Gears, shafts & bearings: 334674A Countershaft/cluster, 1-piece, 5.61, 35T reverse - 1997-2007; 334674 Countershaft/cluster, 39T reverse - 1992-1996; 334670D Input shaft 22T, 10 spline - 5.61 units 1995-2003 (1992-94 6.34 units use 20T 334670); 334271K Needle bearing kit; 334267 Input pocket bearing; 334278A Reverse idler bearing
- Add Seals & gaskets: 334070 Front seal (input retainer); 424074 Rear output seal 77x54x12
- Add Small parts: 334001 Small parts kit (snap rings, keys, springs, detents); 334001A Top cover small parts kit; 334701-2K 1-2 synchro key & spring kit; 334703-2K 3-4 or 5-Reverse synchro key & spring kit
