QU10121 1992-1996 NV4500 Reverse Idler Bearing Spacer

QU10121 1992-1996 NV4500 Reverse Idler Bearing Spacer is used on 1992-1996 model year transmissions to separate the reverse idler bearings. This is a New Old Stock (NOS) genuine NVG steel spacer that is available while supplies last. Fits 1992-1996 Dodge and 1995-1996 GM with 5.61:1 reverse gear ratio AND 1992-1994 GM NV4500 models with 6.34:1 reverse gear ratio. USA Made.

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:
1992-1996 NV4500
Ratios
Matching Parts
Lubricants, Sealants, Threadlockers
NV4500 Tools
Applications

Tech Note 1: 1992-1996 NV4500
All 1992-1996 NV4500 transmissions use two QU10018 metal cage needle bearings separated by QU10121 steel spacer for the reverse idler gear.

Tech Note 2: Ratios
1992-1996 Dodge and 1995-1996 GM NV4500 Transmissions all have a 5.61:1 reverse gear ratio. 1992-1994 GM models have a 6.34:1 reverse gear ratio. The reverse idler gear, reverse idler shaft, and reverse idler bearings are the same for both ratios.

Tech Note 3: Matching Parts
Matching parts for QU10018:
QK1101 Reverse Idler Thrust Washer Kit
QU10118 Reverse Idler Bearing (uses 2)
QU10033 1992-1996 Reverse Idler Gear
QU10040 1992-1996 Reverse Idler Shaft
TKA1182 1992-1996 NV4500 Premium 9 Piece NV4500 Needle Bearing Kit
NV4500GME Bare NV4500 Transmission Case for 1992-1995 GM
TM1003 116 Page NV4500 Shop Manual with over 400 color photographs

Tech Note 4: 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 V1003DVD 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 5: 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.

Applications:

Chevy and GMC:
New Venture NV4500 5 Speed Manual Transmissions: 1992, 1993, 1994, 1995, 1996

Dodge:
New Venture NV4500LD and NV4500HD 5 Speed Manual Transmissions: 1992, 1993, 1994, 1995, 1996