QU10122 NV4500 3-4 Synchronizer Hub is a current production replacement 3-4 Synchro Hub for all 1992-2007 GM and 1992-2005 Dodge New Venture NV4500 5 speed manual transmissions. QU10122 is the perfect replacement for your damaged original hub. Imported.

Need More Info? Use the handy Links below to access over 40 years of Dan’s product and vehicle specific Tech Notes to easily get the information you need for your vehicle’s repair, maintenance, or upgrade project!

Dan the Gear Man Tech Notes:
Common Wear Spots
Groove
Make Complete Synchronizer Assembly
NV4500 Tools
Matching Mainshafts
Lubricants, Sealants, Threadlockers
Matching Parts
Applications

Tech Note 1: Common Wear Spots
Your 3-4 Synchro Assembly is typically subject to wear in 3 spots:
Leading Edge of Synchro Clutch Teeth
Mainshaft Splines
Front Face where Thrust Bearing contacts

Tech Note 2: Groove
The input or forward side of the 3-4 synchro hub has a groove in it.

Tech Note 3: Make Complete Synchronizer Assembly
To make a complete 3-4 synchronizer assembly, order QU10206 sleeve + QU10122 Hub + QK1099 Synchro Strut Kit. 3-4 Synchro assembly procedures are covered in my TM1003 NV4500 Shop Manual or VSG1003DVD NV4500 Overhaul Video.

Tech Note 4: NV4500 Tools
Need Torque Specs or Rebuild procedures? Order my 116 page, full color illustrated TM1003 NV4500 Rebuild Manual.

You will need some special tools to correctly service your NV4500 Transmission. The chart below lists our current NV4500 Special Tools for popular models.

Tech Note 5: Matching Mainshafts
Matching Popular Mainshaft Part Numbers for QU10122 3-4 Synchro Hub are:

Tech Note 6: Lubricants, Sealants, Threadlockers
Early production NV4500 Transmissions used an anaerobic sealant (QU90003) to seal between the main case and input bearing retainer, top cover, and rear housing. Mid-production units used anaerobic sealant just on the input retainer and RTV for everything else. Later production transmissions used black RTV Sealant (QU90006 or QU90005) for everything. Either type of sealant works fine (except the PTO covers ALWAYS should be sealed with RTV), but I prefer RTV for all components. Regardless of which sealant you use, make sure excess sealant does not block the lube access hole at the top of input retainer pilot that fits into the transmission case! Also, the threaded holes in the main case for the four retainer bolts and 12 PTO bolts are open ended, so you must use new bolts with factory applied threadlocker or apply Threadlocker (S24200) to your existing bolts to prevent oil seepage past the bolt threads. See my TM1003 NV4500 Shop Manual or VSG1003DVD NV4500 Overhaul Video for more information.

Lubricant and Chemical List for NV4500 Transmissions:
QU90020 NV4500 Manual Transmission Oil
QU90003 Anaerobic Sealant
QU90006 3.35 oz Ultra Black RTV Sealant
QU90005 0.5 oz Ultra Black RTV Sealant
S24200 6ml Medium Strength Blue Threadlocker
S9978 1 gram Medium Strength Blue Threadlocker
S9979 1 gram High Strength Red Threadlocker
S24026 High Temperature Threadlocker for Mainshaft Nut

Tech Note 7: Matching Parts
Other Matching Parts for QU10122 3rd – 4th Gear Synchro Hub:
QU10732 3-4 Synchro Assembly
QU10206 3-4 Synchro Sleeve
QK1099 Sychro Strut Kit
QU10134 Input to Mainshaft Thrust Bearing
QU10135 Bearing, 3rd Gear
QU10004 Synchronizer Friction Ring (uses 2)
QU10301 Snap Ring, 2-3 Gear Thrust Washer Retaining
QU10302 Thrust Washer (between 2nd and 3rd Gear)
QU10313 Teflon Bearing Spacer for 3rd Gear
QU10316 Pin, Thrust Washer Anti-Rotation
QU10049 or QU10702 4th Gear Clutch
QU10099 28 Tooth Mainshaft 3rd Gear 1992-1994 GM
QU10201 29 Tooth Mainshaft 3rd Gear 1992-2005 Dodge, 1995-2007 GM
Mainshafts: See Tech Note 5
QU10001 Premium Bearing and Seal Kit 1992-1996 Dodge
QU10005 Premium Bearing and Seal Kit 1997-2005 Dodge
QU10061 Premium Bearing and Seal Kit 1992-1995 GM 4×4
QU10062 Premium Bearing and Seal Kit 1996-2005 GM 4×4
QU10063 Premium Bearing and Seal Kit 1992-1995 GM 4×2
QU10064 Premium Bearing and Seal Kit 1996-2007 GM 4×2
QU90020 NV4500 Manual Transmission Oil
TM1003 NV4500 Shop Manual
VSG1003DVD NV4500 Overhaul Video
Chevy & GMC Shop Manuals
Dodge & Ram Shop Manuals

Applications:

Chevy and GMC:
C1500, K1500, C2500, K2500, C3500, C3500HD, K3500 with NV4500 5 Speed: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C2500, K2500, C3500, K3500 Standard and HD Pickup based models with NV4500 5 Speed: 2000, 2001, 2002, 2003, 2004, 2005, 2006
C3500HD 15,000 Lb. GCVW Cab and Chassis with NV4500 5 Speed: 2000, 2001, 2002
C2500, K2500 Silverado Classic and Sierra Classic with NV4500 5 Speed: 2007

Dodge and Ram:
D250, W250, D350, W350 with Cummins Diesel AND our NV4500 Transmission Retrofit Kit: 1989, 1990, 1991, 1992, 1993
Ramcharger, D150, W150 with NV4500 5 Speed: 1992, 1993
D250, W250, D350, W350 with Gas Engine and NV4500 5 Speed: 1992, 1993
Ram 2500, Ram 3500 with V10 and NV4500HD 5 Speed: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
Ram 2500, Ram 3500 with Cummins Diesel and NV4500HD 5 Speed: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Ram 2500, Ram 3500 with gas V8 and NV4500LD 5 Speed: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005