Description
Comparison points and tradeoffs
When comparing E-cowlboy 1/2′ Drive Mainshaft 5th Gear Nut Wrench for Dodge 1994-2004 NV4500HD models with Cummins Diesel or V-10, NV4500 4×4 29 spline & 4×2 31 Spline Output with other Tools options, use this source-backed detail as the primary discriminator: A Must Have Tool: Required for all in-vehicle and bench repairs that involve mainshaft service, including mainshaft fifth gear replacement.
Use this second fact to evaluate the tradeoff: This wrench is required for all in-vehicle and bench repairs that involve mainshaft service, including mainshaft fifth gear replacement. A third point to compare across alternatives is: Category: Replacement Parts / Transmission & Drive Train / Transmissions & Parts / Tools.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
Applications:
Use for Dodge NV4500 4×4 29 Spline & 4×2 31 Spline output. All NV4500HD models with Cummins Diesel or V-10.
A Must Have Tool:
Required for all in-vehicle and bench repairs that involve mainshaft service, including mainshaft fifth gear replacement.
Features:
–A necessity to remove or install the mainshaft nut.
–Replaces Mopar/Miller special tool 6743.
–High quality steel resisting rust, corrosion and tear, ensures an unparalleled long lifespan.
–Note that wrench only fits one way on nut. Be sure wrench is fully engaged in nut slots and is not cocked.
Source product highlights
About this item
- APPLICATION – Fits for Dodge NV4500 4×4 29 spline & 4×2 31 Spline output New Venture NV4500HD models with Cummins Diesel or V-10. 1/2″ Drive. Replaces Mopar/Miller special tool 6743.
- FUNCTION – This special wrench is used to remove and install the output shaft 5th gear locknut in NV4500 and NV4500 HD manual transmissions.
- MUST HAVE TOOL – GM 4×4 and NV4500 transmissions have 4 slot nuts on the output side of the mainshaft, which retaining the mainshaft 5th gear. Due to the high torque these nuts are tightened to, it is essential to use the correct wrench to remove and install the mainshaft nut. This wrench is required for all in-vehicle and bench repairs that involve mainshaft service, including mainshaft fifth gear replacement.
- SUPERIOR MATERIAL- CNC machined from high standard GB 40CR alloy steel, resisting rust and impact, ensure a perfect fit with exact tolerances for problem-free performance and long term service.




Mike –
Tool works well. It fit the locknut tight and required tapping on but other than that was great.
Customer –
GOOD PRICE, ARRIVED ON TIME .I USED IT TO TIGHTEN NUT ON OUTPUT SHAFT OF MY NV4500 TRANS WORKED GREAT
marlene wilson –
Worked great! Helped tighten the nut to torque specs.
Cathy B –
Did the job very well
etodd –
Used it to torque my NV4500 5th gear nut with my torque wrench
Shane perry –
This wrench is built well, but it does not fit a gm nv4500 mainshaft nut.