Getting the NV4500 mainshaft assembled correctly is the critical step in any rebuild. One synchro ring in the wrong position or a gear installed backwards means pulling everything apart again. This video walks through the complete assembly process as done in our shop.
What This Video Covers
Complete NV4500 mainshaft assembly — gear stacking sequence, synchronizer ring placement, snap ring installation, and proper use of the mainshaft holding wrench. This is the assembly counterpart to our NV4500 Transmission Teardown Guide.
Also Watch: Mainshaft Disassembly
If you haven't seen the teardown yet, start with the disassembly video:
Mainshaft Tools
- QT2000 29-Spline Mainshaft Holding Socket Wrench — for 4x4 NV4500 mainshaft work
- QT2011 31-Spline Mainshaft Wrench — for 4x2 Ram NV4500HD and NV5600
NV4500 Tech Resources
- NV4500 5th Gear Failures & Solutions — the most common NV4500 problem and how to fix it
- Defects in NV4500 Cast Iron Tailhousings — what to inspect before reassembly
- NV4500 Transmission Teardown Guide — complete multi-part teardown with video
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