TK50260 31 Spline Input Shaft for 1973-1979 Ford NP205

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Dan the Gear Man® Tech Notes:
Ford NP205
Clutch Teeth
Wear Locations
Matching Parts
Tech Help
Applications

Tech Note 1: Ford NP205
Ford only offered the NP205 Transfer Case from 1973-1979 and all are left drop models with the front output shaft on the drivers side. From 1974-1979, Ford offered both the part-time NP205 and full-time NP203 transfer cases for F-Series 4x4s. Ford used a remote mount in the F250 from 1973 to 1977.5 and direct mount units from 1973-1979. For 1973-1977.5, only the 1/2 ton F100/F150 was available with the direct-mount NP205 (for 1973-74 with auto transmission only). The F250 got the direct mount NP205 when the 1977.5 "Low-Boy" truck debuted, but the Bronco had to wait until 1978 when it was up sized to the 1/2 ton truck drivetrain.

Tech Note 2: Clutch Teeth
The most common wear issue with NP205 input shafts is worn clutch teeth. It does not take much wear on the input shaft and sliding clutch collar teeth for the transfer case to "jump" out of high range. If your input shaft has significant wear on the clutch teeth, replace it and the sliding collar.

Tech Note 3: Wear Locations
NP205 Input Shafts may also have damaging wear on other locations. Input shaft with significant wear that can be felt with your fingernail should be replaced with a new shaft along with the matching component. Look for wear at these locations:
Rear Bearing Pilot: Indentations from the needle rollers that fit in the front of the rear output shaft
Helical Gear Teeth: If run short of oil, teeth will show temperature discoloration and/or visible wear
Input Splines: Visible wear on the splines is usually caused by lack of lubrication

Tech Note 4: Matching Parts
Matching Parts for QU50260 Input Shaft:
Exploded View XV4009 1973-1979 Ford Direct Mount NP205 Transfer Case
TK50106 Input Ball Bearing
QK2175 Set of 4 Selective Fit Input Shaft Snap Rings (Also available individually)
QU50275 Set of 15 Needle Roller Bearings for Input Shaft to Rear Output Shaft Connection
TK50175 4 Bolt Round Input Bearing Retainer Gasket
TK20031 6 Bolt Round Transmission to Transfer Gasket with Cutout for Shift Rail
TK10517 Double Lip, Double Spring Input Seal
QU50339 Sliding Clutch Collar Ring
TK50084 Rear Output Shaft
QA2060 Complete Small Parts Kit
TK2025 Master Overhaul Kit, Remote Mount (1973-1977.5)
TK2026 Master Overhaul Kit, Direct Mount
TK2039 Gasket and Seal Kit, Remote Mount (1973-1977.5)
TK2058 Gasket and Seal Kit, Direct Mount

Tech Note 5: Tech Help
Need Tech Help on rebuilding your NP205? Get my TM2000 New Process NP205 Transfer Case Service Manual. A Complete NP205 shop Manual with over 375 color photographs is your indispensable NP205 resource for Repair Procedures and Parts Identification. Complete coverage of Disassembly, Inspection, and Reassembly Procedures. Also, Shop Notes, Tool Recommendations, Complete Parts Guide, and full color Exploded Views (the TM2002 is included in the TM2000!), including Right Drop and Left Drop Models, plus GM Specific Parts. Covers New Process NP205 Transfer Cases found in Chevrolet, Dodge, Ford, GMC, and International Harvester (IHC) 4x4 vehicles from 1969-1993.
Or my TM2002 for the Exploded Views and Parts Guide only. Fully Illustrated with dozens of crisp color photographs for EASY Parts Identification! This Manual includes 10 page Parts Identification Guide with full color Exploded Views.

Applications
Ford:
F100/F150: 1973, 1974, 1975, 1976, 1977, 1978, 1979
F250: 1977.5, 1978, 1979
Bronco: 1978, 1979
F350: 1979