QU10303 NV4500 Mainshaft Reverse Gear Thrust Washer


QU10303 NV4500 Mainshaft Reverse Gear Thrust Washer is a heavy-duty precision ground, cast iron Thrust Washer that fits between your mainshaft reverse gear and rear output bearing. QU10303 fits all 1992-2007 GM and 1992-2005 Dodge New Venture NV4500 transmissions.

Also see QK1104 Thrust Washer Kit

Reverse Gear Thrust Washer
* Kits made up of multiple items may not show an inventory in-stock status but are almost always in stock!

tech note

The thick, cast iron Reverse Gear Thrust Washer used in the NV4500 transmission should be replaced if there is ANY evidence of wear on the thrust face.

tech note

Lubricate the Thrust Washer with clean QU90020 NV4500 Transmission Oil before installation.

tech note

Matching Parts for QU10303 Thrust Washer:
QU10119 Timken Mainshaft Rear Bearing
QU10118 Timken Mainshaft Rear Bearing Cup
QA10009 Complete Mainshaft Shim Kit
QU10009B Basic Mainshaft Shim Kit
QK1093 Small Genuine NVG Nut Set for Dodge NV4500LD and GM 4x4
QU10069 Large Set Screw Type Mainshaft Nut Set for Dodge NV4500HD
QU10097 Small Set Screw Type Mainshaft Nut Set for Dodge NV4500LD and GM 4x4
QU10181 4x2 Rear Output Lock Nut for GM C-Truck
QK1102 Lock Ring Kit Includes 4 Lock/Snap Rings
QK1118 Rear Bearing Retainer/Thrust Plate Bolt Set
QU10037 Countershaft Bearing Plate
QU10175 Mainshaft Rear Retainer Thrust Plate
QU10085 35 Tooth Synchronized Reverse Gear for 1997-2005 Dodge, 1999-2007 GM
QU10074 35 Tooth Non-Synchro Reverse Gear for 1997-1998 GM
QU10073 39 Tooth Non-Synchro Reverse Gear for 1992-1996 GM
QU10171 39 Tooth Synchronized Reverse Gear for 1992-1996 Dodge Ram
QA1045 Heavy-Duty 4x4 29 Spline Mainshaft Kit for 1994-2004 Dodge NV4500HD
QU10011 Full Spline 4x4 Mainshaft for Dodge NV4500HD
QU10013 Full Spline 4x2 Mainshaft for Dodge NV4500HD
QU10214 23 Spline 4x4 Mainshaft for Dodge NV4500LD
QU10098 32 Spline 4x4 Mainshaft for GM
QU10719 35 Spline 4x2 Mainshaft for GM Pickups
QU10212 35 Spline 4x2 Mainshaft for 1992-2002 GM C3500HD w/Park Brake
QU10236 4x2 Mainshaft for GM P-Truck without transmission park brake

tech note

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

Need Torque Specs or Rebuild procedures? Order my 116 page, full color illustrated 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.


Component 23 Spline
Dodge 4x4
29 Spline
Dodge 4x4
30 Spline
Dodge 4x2
31 Spline
Dodge 4x2
32 Spline
GM 4x4
35 Spline
GM 4x2
Mainshaft Nut QT2002 QT2001
QT2002 QT2001
1-1/2" Hex
Mainshaft Holding NLA QT2000 NLA QT2011 N/A N/A
5th Gear Nut
Torx® Cross Bolt
N/A QT9205 N/A QT9205 N/A N/A
Output Seal Installer N/A QT1801 N/A QT2058
Not Used Not Used
Tailshaft Bushing Remover and Installer Not Used Not Used Not Used QT2044 Not Used Not Used


Front Bearing Cup Installer
QT1802 Use with QT1101 or QT1119 Driver Handle. Also can use flat side to install Dodge 4x4 Rear Output Seal
Countershaft Front Bearing Installer QT2004 Can also use to press 3-4 Synchro Hub on original equipment mainshafts
Input Bearing & Countershaft Rear Bearing Installer QT2005 Can also use to install Input Seal
Input Bearing Cup Installer QT1801 Use with QT1100, QT1101, QT1116, or QT1119 Driver Handle.
Countershaft Support QT2006 Use to support front of countersahft when installing countershaft rear bearing
1-2 Synchronizer Support QT2008 Use to support 1-2 synchronizer hub during synchronizer assembly
10mm 1/2" Drive 12 Point Socket QT1020 USA Made Impact Socket for Factory Tailshaft Housing Bolts
Long Shank Punch for Shift Lug QT9300 3/16" x 8" Shank for 5th Gear Shift Lug Roll Pin



Chevy and GMC:
1992-2007 GM C1500, C1500, C2500, K2500, C3500, K3500 trucks, and P-series vans with NV4500, MW3, or MT8 Transmissions

Dodge, Plymouth, and Ram:
1992-1993 D150, W150, D250, W250, D350, W350 with Gas engine and NV4500 5 Speed
1994-2005 Ram 2500, Ram 3500 with NV4500 5 Speed Manual Transmission

Other Popular Applications:
1989-1993 Dodge 250, 350 Series with Cummins Diesel and NV4500 Transmission Retrofit Kit
Jeeps and Rock Crawlers with 5.04: Reverse Ratio NV4500 Conversions