QU50640 23 Spline x 4-5/16" 1996-1999 NP241D Transfer Case Input Shaft

QU50640 Genuine NPG 23 Spline x 4-5/16" Long NP241DLD, NP241DHD Transfer Case Input Shaft for 1996-1999.5 Automatic Transmission Dodge Ram 2500, Ram 3500 4x4 Trucks Use with optional QU50874 Narrow Input Bearing. This USA made, genuine New Process original equipment replacement part includes a factory installed Input Shaft to Mainshaft Pilot Bearing in the back of the Shaft. QU50640 fits some 1996-1997, all 1998 and most 1999 Dodge NP241DLD and NP241DHD Transfer Cases in Ram 4x4s with 46RE or 47RE automatic transmissions. USA Made.

Also See: QU52100 Aftermarket Replacement 23 Spline Input Shaft
               QU50640 Used 23 Spline Input Shaft

Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project!

Dan the Gear Man® Tech Notes:
Assembly Numbers 
Planetary Tooth Cut
Input Bearing Width 
Pilot Bearing 
Synchro Clutch Teeth 
Transmission or Transfer Case Swaps 
Replacing 29 Spline with 23 Spline 
1994-2002 NP241DLD Matching Parts 
1994-2002 NP241DHD Matching Parts 
Applications

Tech Note 1: Assembly Numbers 
QU50640 23 spline Input Shaft was used on these Dodge NP241 transfer case assembly numbers: 52098151, 52098153, 52105025, 52105028, 52105093, 52105315, and 52105369.  Note: QU50640 was NOT used in 1999.5-2002 assemblies with AB, AC, or AD suffix (ex. 52105028AB), these transfer cases use QU10179 wide bearing input.

Tech Note 2: Planetary Tooth Cut
Many early production (1994-1995 and possibly some very early 1996) Ram 2500, Ram 3500 4x4 trucks with New Process NP241DLD and NP241DHD transfer cases have a wide cut planetary gear set. While the planetary gear tooth profile is visibly different than narrow cut teeth used through 2002, the diameters of the 3 pieces (Input, Planetary, Annulus) are also slightly different. See Help Article IDN-400 for more information.

Tech Note 3: Input Bearing Width
1994-2002 Dodge Ram NP241DLD and NP241DHD Transfer Cases were built with input shafts  using either a narrow (5/8” wide, Single Row) or wide (15/16” wide, Double Row) Input Ball Bearing. While a narrow bearing cannot be used on an input made for the wide bearing and visa-versa, the combined matching bearings and shafts are totally interchangeable. For example, If you are doing a manual transmission swap on a 1998 Automatic transmission equipped Cummins powered truck with NP241DHD Assembly number 52105028, you can replace the original QU50640 input shaft/QU50874 Narrow Bearing with QU10889 29 Spline Input/QU50873 Wide Bearing. Need more info? See IDN-401 Input Bearing Tech.

Tech Note 4: Pilot Bearing
The Input Shaft to Mainshaft Pilot Bearing is included with this Input Shaft. Your matching Mainshaft (Rear Output Shaft) will have a Pilot Diameter of 1-5/16". An optional steel adapter ring for using this input with smaller transfer cases like the NP231 will be available soon. 

Tech Note 5: Synchro Clutch Teeth
The Input Shaft Synchro Clutch Teeth are machined inside the back of the Input Shaft. The Sliding Clutch Collar will engage the Synchro Clutch Teeth in High Range. Single Cut teeth are beveled in one direction. Double Cut Teeth are beveled the same to left and right. Input Shafts with single cut Synchro teeth were only used on 1999.5 to 2002 NP241DLD and NP241DHD models on vehicles with automatic transmissions and some 2002 cases in manual transmission Ram trucks without the vacuum controlled Central Axle Disconnect (CAD). The actual engineering reason using the single cut tooth profile for late production automatic equipped models is not known by us, but except for manual transmission assembly 52105027AD used in 2002 trucks without Central Axle Disconnect and 52105028AB assemblies for 2001-2002, all 1998-2002 NP241DHD transfer cases using the single cut input use the same Sliding Range Sleeve (qu50150) as all the other NP241DHD applications.  Since range shifting is usually done with the vehicle stopped and the transmission in park (auto) or neutral (manual), the cut of the synchro teeth is not usually an issue. (Click Here for Detailed Photo)

Tech Note 6: Transmission or Transfer Case Swaps
Replacing a manual transmission with an automatic? Verify the input shaft length needed to couple to your transmission. In most cases the RH series Dodge automatic transmissions mate to a 5-3/64" long transfer case input shaft. RE series typically need a 4-5/16" long transfer case input.

Tech Note 7: Replacing 29 Spline with 23 Spline 
If you are replacing a 29 spline manual transmission with a 23 spline output RE series transmission, use this 23 spline input shaft if your transfer case assembly number is one of these: 52105024, 52105027, 52105092, 52105314, 52105336,  52105370.

Tech Note 8: 1994-2002 NP241DLD Matching Parts
Exploded View XV4002 1994-1997 Dodge Ram NP241DLD Transfer Case
Exploded View XV4004 1998-2002 Dodge Ram NP241DLD Transfer Case
QU50874 Input Ball Bearing, 5/8" Thick
QU10893 Snap Ring, Input Bearing to Input Shaft
QU10857 Input Seal
QU10572 Input Shaft to Planet Thrust Washer (uses 2)
QU50153 Planetary Assembly, most 1994-1996 NP241DLD and all 1997-2002
QU50152 Range Sliding Sleeve

Tech Note 9: 1994-2002 NP241DHD Matching Parts
Exploded View XV4000 1994-1996.5 Dodge Ram NP241DHD Transfer Case
Exploded View XV4001 1996.5-1997 Dodge Ram NP241DHD Transfer Case
Exploded View XV4003 1998-2002 Dodge Ram NP241DHD Transfer Case
QU50874 Input Ball Bearing, 5/8" Thick
QU10893 Snap Ring, Input Bearing to Input Shaft
QU10857 Input Seal
QU10572 Input Shaft to Planet Thrust Washer (uses 2)
QU50494 Planetary Assembly, most 1994-1996 NP241DHD and all 1997-2002
QU50150 Range Sliding Sleeve

Applications
Dodge Ram:
Ram 2500, Ram 3500 with NP241 Transfer Case Assembly Numbers 52098151, 52098153, 52105093, 52105315, 52105369: 1996, 1997
Ram 2500, Ram 3500 with NP241 Transfer Case Assembly Numbers 52105025 and 52105028: 1998, 1999.5