QT2001 1/2″ Drive NV4500HD Mainshaft 5th Gear Nut Wrench for Dodge

QT2001 Mainshaft 5th Gear Nut Spanner Wrench for 1994-2004 Dodge NV4500HD is a necessity to remove or install the mainshaft nut. Required for all in-vehicle and bench repairs that involve mainshaft service, including mainshaft fifth gear replacement. Fits Dodge NV4500 4×4 29 spline & 4×2 31 Spline output New Venture NV4500HD models (Cummins Diesel or V-10). 1/2″ Drive. Made in Montana, USA.

See also QT2036 Professional version with 3/4″ Drive.
Matching 29 Spline Mainshaft Holding Wrench for 4×4: QT2000
Matching 31 Spline Mainshaft Holding Wrench for 4×2: QT2011

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Dan the Gear Man® Tech Notes:
Mainshaft Nut
Nut Variations
Applications

Tech Note 1: Mainshaft Nut
Factory and almost all rebuilt GM 4×4 and Dodge NV4500 NV4500 transmissions have 4 slot nuts on the output side of the mainshaft to retain the mainshaft 5th gear. Due to the high torque these nuts are tightened to, it is essential to use the correct wrench for the remove and install the mainshaft nut. All Dodge NV4500 transmissions use 1 of two sizes of spanner wrenches. NV4500HD used in Cummins and V10 powered Dodge RAM models have a large diameter mainshaft nut. For these transmissions select either QT2001 (1/2″ drive) or QT2036 (3/4″ Drive). For 1992-1993 NV4500 and 1994-2000 NV4500LD transmissions in gas V8 Dodge trucks use QT2002. 2001-2005 Dodge NV4500LD transmissions generally have the same 29 spline 4×4 and 31 spline 4×2 mainshafts as the HD models and require QT2001 wrench. All GM 4×4 transmissions use the smaller mainshaft nut. Most early and mid production GM NV4500 4×4 transmissions had a vibration dampener which has a recess for the mainshaft nut. QT2028 socket is required to remove/install the mainshaft nut on GM transmissions with the vibration dampener. If your GM NV4500 has the steel tube spacer tube instead of a vibration dampener, you can use either QT2002 spanner wrench or QT2028 socket.

Tech Note 2: Nut Variations:
A number of different nut types have been used to retain the NV4500 5th gear. The factory nut is always round with 4 slots as are most aftermarket nuts. For either factory or aftermarket round nuts, as long as the nut is made to the original New Venture Gear outside diameter and slot configuration our wrenches will work perfectly regardless if it is solid or split. For nuts using set screws, install the set screws after final torquing of the nut. In the past, we have seen fitment problems with some cheap, round import nuts that are made to a smaller outside diameter than factory. Rarely you may also find a hex or some other nut type retaining your 5th gear. If you have one of these wierdo nuts, our wrenches will not fit.

Applications:
Dodge
Cummins or V10 truck with 29 spline 4×4 NV4500HD: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Cummins or V10 truck with 31 spline 4×2 NV4500HD: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

V8 Gas Powered truck with 29 spline 4×4 NV4500LD:  2001, 2002, 2003, 2004, 2005
V8 Gas Powered truck with 31 spline 4×2 NV4500LD: 2001, 2002, 2003, 2004, 2005