QU10015 NV4500 1st or 2nd Outer Steel Synchronizer Rings are high quality, original equipment style, steel outer synchronizer rings for all 1992-2007 GM and 1992-2005 Dodge New Venture NV4500 5 speed manual transmissions. On the NV4500, 1st and 2nd gears use a triple cone synchronizer setup. Each gear will have 1 each of QU10002 Center Friction Ring, QU10014 Inner Steel Ring, and QU10015 Outer Steel Ring. The center ring is the friction ring. It will be sandwiched between the other two rings when you assemble your transmission. We like to replace the three rings when doing a complete rebuild; however, the inner and outer steel rings can usually be reused if the cone surface is not burned or scored. You need one of these rings for 1st gear and one for second gear. Made in Korea.

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Dan the Gear Man Tech Notes:
Common Causes of Shift Difficulties
Inspect Rings
Soak Rings
NV4500 Tools
Lubricants, Sealants, Threadlockers
Matching Parts
Applications

Tech Note 1: Common Causes of Shift Difficulties
Typically, NV4500 transmissions with stock type synchronizer rings are easy to shift, with a smooth positive feel. This is largely due to the advanced carbon fiber coatings on the rings and the use of compatible lubricants like Castrol Syntorq LT or QU90020 NV4500 Manual Transmission 75w85w GL-4 synthetic gear lubricants. If you are experiencing shift difficulties with your NV4500, the most likely causes are: wrong or dirty lubricant, clutch issues, excessive mainshaft bearing end-play, or aftermarket brass synchro rings were installed when the transmission was rebuilt. Sometimes, changing the oil will help, but typically, by the time you get around to fixing the problem, the damage is already done.

Tech Note 2: Inspect Rings
The New Venture NV4500 5 speed transmission uses a triple cone synchronizer design for 1st and 2nd gears. It is advisable, but not required you replace QU10014 Inner Steel Rings and QU10015 Outer Steel Rings at the same time you replace QU10002 Center Friction Rings. To reuse QU10014 and QU10015 Rings, the condition of the friction surfaces on those rings must be good. If the polished steel finish is pitted, scored, or heat discolored (bluish color), you should replace them.

Tech Note 3: Soak Rings
Soak your synchronizer rings in QU90020 75w85w GL-4 Synthetic Manual Transmission Fluid for New Venture NV4500 transmissions. For more information on rebuilding your NV4500 transmission, order my 116 page, full color illustrated TM1003 V4500 Rebuild Manual.

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: 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 Threadlocker
S9978 1 gram Threadlocker
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 6: Matching Parts
Matching Parts for QU10015 1st-2nd Outer Synchronizer Ring:
QU10038 1-2 Synchro Hub
QU10081 1-2 Synchro Slider
QK1100 1-2 Synchro Strut Kit
QU10002 Synchronizer Ring, Center Friction
QU10014 Synchronizer Ring, Inner Steel
QK1103 Snap Ring Kit, 1-2 Synchro
QU10075 39 Tooth Mainshaft 1st Gear
QU10035 37 Tooth Mainshaft 2nd Gear
QU90020 NV4500 Manual Transmission Oil
TM1003 NV4500 Shop Manual
VSG1003DVD NV4500 Overhaul Video

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