QU10067 22 Tooth x 35 Spline NV4500HD Mainshaft 5th Gear

QU10067 22 Tooth x 35 Spline NV4500HD Mainshaft 5th Gear for 1994-2004 Dodge Ram 2500 and 3500 trucks with either Cummins Diesel or gas V10 engines and New Venture NV4500HD 5 speed transmissions. This includes all the 31 spline 4x2 and 29 spline 4x4 NV4500HD transmissions. This high-quality gear is comparable to the original New Venture Gear for fit and function. Large bore with 35 internal splines. Imported.

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Dan the Gear Man® Tech Notes:
Gear Installation 
Losing 5th Gear
NV4500 Tool List 
In-Vehicle Replacement 
Matching Parts 
Lubricants, Sealants, Threadlocker 
Applications

Tech Note 1: Gear Installation 
QU10067 is a quality replacement 22 tooth x 35 spline Mainshaft Fifth Gear that replaces QU10006 original equipment gear for 1994-2004 Dodge New Venture NV4500HD 5 speed manual transmissions behind Cummins Diesel or gas V10 engines. QU10067 works on both 29 spline 4x4 and 31 spline 4x2 Mainshafts. Your mainshaft spline outside diameter should be about 1.79-1.80". QU10067 ONLY fits Dodge NV4500HD transmissions. With the original design of the NV4500HD mainshaft and fifth gear, the 5th gear was an interference (press) fit to the mainshaft. With the original configuration, a puller was required to remove the gear and a special installer was used to press the gear on the shaft. All the current production full-spline mainshafts are made so the gear will be a slip fit, so NO 5th gear puller or installer OR heating of the gear is required to remove/install QU10067 5th gear on a new full spline or worn factory mainshaft.

Tech Note 2: Losing 5th Gear
Dodge versions of the New Venture NV4500HD transmission in Cummins Diesel powered trucks are particularly susceptible to the failure commonly known as "losing fifth gear "

5th gear tooth breakage is usually caused by either gear misalignment or excessive torque. A known cause of Misalignment is defective aftermarket cast iron tailshaft housings.

Tech Note 3: NV4500 Tool List
Need Torque Specs or Rebuild procedures? Order my TM1003 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.

Tech Note 4: In-Vehicle Replacement
The mainshaft 5th Gear can be replaced while the transmission is still in the vehicle if the tailshaft housing is removed. You will need QT2001 Mainshaft Nut wrench and either QT2000 29 Spline 4x4 Shaft Wrench or QT2011 31 Spline 4x2 Shaft wrench. You use QT2000 to tighten the Mainshaft Nut while keeping the mainshaft from turning with the splined Mainshaft Nut Wrench. Dodge Shop Manuals specify NV4500 Mainshaft Nut Torque as 270-280 lb.-ft.. If you are using the OE style, split, clamp nut, the Cross Bolt should torqued to 10 lb.-ft. after the nut is torqued to specification. Kits with the Gear, Nut Set and Tools are QK1054 for 4x4 and QK1116 for 4x2 transmissions

Tech Note 5: Matching Parts
QU10023 Dodge 4x2 NV4500HD Transmission Rear Output Seal
QU10123 Dodge 4x4 NV4500HD Seal
QU10069 Replacement NV4500HD Mainshaft Nut and Washer Set with Set Screws
QA1045 Full Spline Heavy-Duty 4x4 Mainshaft Kit
QU10011 Fully Splined 4x4 Mainshaft
QU10013 Fully Splined 4x2 Mainshaft
QU10203 Countershaft 5th Gear
TK10519 Transmission to Transfer Case Gasket (optional 1994-2005)
QU10106 12 Point Metric Tailshaft Housing Bolt with factory applied Threadlocker
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
QU90020 NV4500 Manual Transmission Oil
TM1003 NV4500 Shop Manual
V1003DVD NV4500 Overhaul Video
QT1020 10mm, 12 Point Impact Socket for Tailshaft Housing Bolts
QT2000 Spline Wrench for 29 Spline 4x4 Transmission
QT2011 Spline Wrench for 31 Spline 4x2 Transmission
QT2001 Mainshaft Nut Wrench
QT2036 Mainshaft Nut Wrench, 3/4" Drive

Tech Note 6: Lubricants, Sealants, Threadlocker
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

Applications:
Dodge and Ram:
Ram 2500, Ram 3500 with Cummins Diesel or Gas V10 Engine and New Venture NV4500HD Transmission: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004