Description
IDN-403 NP231, NP241 Input Shaft Chart for New Process Transfer Cases
Many New Process and New Venture Chain Drive Transfer Cases use input shaft and planetary low range units of similar design which allows for a fair range of input shaft interchangeability for conversion and special applications. The most common models/inputs used in conversions are the mechanical shift NP231 and NP241 series cases. Some of the other New Process/New Venture transfer case models use the same inputs as the 231/241, but for simplicity, we will just stick to the two named cases.
Both Transfer Case models were used by multiple vehicle makes including Chevy, Dodge. GMC, and Jeep. Both models also went through multiple "generations" and changes so there is no 1 part fits all interchangeability. Starting with the basics, there are Wide and Narrow Tooth Planetary Gear Sets and Wide and Narrow Input Bearings. There are also multiple spline sizes and different Input Shaft to Mainshaft Pilot Bearing Bores.
We will be building the charts and adding more information over time as an ongoing project, so call us if you do not see the info you need.
| Chart 1 1994-2002 Dodge NP241DLD, NP241DHD Input Shafts Dual Fit, Work with EITHER Narrow or Wide Tooth Planetary** All Shafts Listed Have A Pilot Bearing Bore of 1-5/8" Also see these Exploded Views: XV400 1998-2002 NP241DHD Input Shaft and Related Parts XV401 1998-2002 NP241DLD Input Shaft and Related Parts XV402 1994-1997 NP241DHD Input Shaft and Related Parts (under construction) XV403 1994-1997 NP241DLD Input Shaft and Related Parts (under construction) |
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| Part # | Spline Count |
Length *** |
Input Bearing Width* |
Pilot Bearing Included? |
Origin | Synchro Clutch Teeth (See IDN402) |
| QU10179 | 23 | 4-5/16" | 15/16" | Yes | USA | 1-Way |
| QU50640 | 23 | 4-5/16" | 5/8" | Yes | USA | 2-Way |
| QU52100 | 23 | 4-5/16" | 5/8" | No | Import | 2-Way |
| QU50637 | 23 | 5-3/64" | 15/16" | Yes | USA | 2-Way |
| QU51201 | 23 | 5-3/64" | 15/16" | No | Import | 2-Way |
| QU50638 | 23 | 5-3/64" | 5/8" | No | Import | 2-Way |
| QU10699 | 29 | 5-3/64" | 5/8" | Yes | USA | 2-Way |
| QU11464 | 29 | 5-3/64" | 5/8" | No | Import | 2-Way |
| QU10899 | 29 | 5-3/64" | 15/16" | Yes | USA | 2-Way |
| QU50477 | 29 | 5-3/64" | 15/16" | No | Import | 2-Way |
| * 5/8" (0.625") Wide Bearing is actually 16mm (0.6299"). See IDN-401. ** These input shafts designed for a narrow tooth planetary will also fit a wide tooth planetary. For more information. See IDN-400. *** Length: 1996-2002 RE Series Automatics, use 4-5/16" Input, all others use 5-3/64". |
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| Chart 2 1994-1995 Dodge NP241DLD, NP241DHD Input Shafts For Wide Tooth Planetary Only** All Shafts Listed Have A Pilot Bearing Bore of 1-5/8" Also see these Exploded Views: XV402 1994-1997 NP241DHD Input Shaft and Related Parts (under construction) XV403 1994-1997 NP241DLD Input Shaft and Related Parts (under construction) |
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| Part # | Spline Count |
Length | Input Bearing Width |
Pilot Bearing Included? |
Origin | Aftermarket Alternate* |
| QU50639 | 23 | 5-3/64" | 15/16" | Yes | USA | QU51201 |
| QU11480 | 29 | 5-3/64" | 15/16" | Yes | USA | QU50477 |
| *Listed Aftermarket Alternate Shafts are Dual-Fit and will work with either Wide Tooth or Narrow Tooth Planetary Gearing. The Alternate shafts are imported and do not include the pilot bearing. **QU50639 and QU11480 USA Made OEM input shafts will ONLY fit a wide tooth planetary. For more information. See IDN-400. |
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Also See:
IDN-400 NP241D Planetary Tooth Differences
IDN-401 NP231, NP233, NP241, NP242 Input Bearing Width Tech Help
IDN-402 Input Shaft High Range Clutch Teeth
IDN-403 NP231/NP241 Input Shaft Chart
IDN-404 ID My 1994-2002 Dodge NP241DLD or NP241DHD Transfer Case
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