TK10517 Genuine NPG 2-Way Transfer Case Input Seal

TK10517 Genuine NPG 2-Way Transfer Case Input Seal acts as both the transmission rear output seal and transfer case input seal for many New Process aluminum case transfer cases plus cast iron, direct mount NP203 and direct mount, Large Bore NP205 Transfer Cases. Fits NP203C, NP205C, NP208C, NP241C, 32 Spline Input GM models behind automatic and manual transmissions. Ford fits NP208, 31 Spline Ford NP205 and NP203 direct mount cases. Dodge applications include NP208, NP231D, NP241D to 1993, and 29 Spline NP205 in 1989-1993 Diesel 5 SPEED trucks. This genuine New Process original equipment quality Seal is a double lip, double spring seal designed to retain fluids from either direction. Made in Mexico.

Also see lower cost QU50461 replacement seal

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:
Lubricate Lip 
Age Hardening
Matching Parts
Applications

Tech Note 1: Lubricate Lip 
To provide initial lubrication, apply a thin film of clean grease or petroleum jelly to the seal lips and input shaft seal surface before final assembly.

Tech Note 2: Age Hardening
For most applications that use this seal, the seal is functioning both as the transmission rear output seal and the transfer case input seal. As the seal ages over many years and after many heat/cool cycles, the seal lips will become inflexible and start to leak oil from the transmission into the transfer case. The cure is simple, remove the transfer case and replace the seal. 

Tech Note 3: Matching Parts
TK30061 O-Ring, GM Turbo 400 or 4L80E Auto Transmission Main Case to Transfer Case Adapter
TK30047 6 Bolt Gasket, early GM Turbo 400 to Transfer Case Adapter
TK20031 Gasket, 6 Bolt Round with Cutout Transmission To Transfer Case Ford Direct Mount NP205
TK50175 Gasket, 4 Bolt NP203 and NP205 Direct Mount Input Bearing Retainer
TK30052 Gasket, 6 Bolt Round GM Transfer Case to Transmission
TK10519 Gasket, 6 Bolt Round, Dodge Transfer Case to Transmission
TK10529 Gasket, 8 Bolt Hourglass GM and Dodge NP205 to Adapter
TK30036 Gasket, 6 Bolt with Cutout 1985-1991 GM NP205 to Adapter
TK20255 Gasket, 6 Bolt Round Transmission To Transfer Case Ford NP208
Chevy & GMC Shop Manuals
Dodge & Ram Shop Manuals
Ford Shop Manuals
Jeep Shop Manuals

Applications

Chevy and GMC:
NP205 Part Time Transfer Case with 32 Spline Input Shaft: 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
NP203 Full Time Transfer Case: 1973, 1974, 1975, 1976, 1977, 1978, 1979
NP208C Transfer Case: 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988
NP207C Transfer Case: 1983, 1984, 1985, 1986, 1987
NP231C Transfer Case: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
NP241C Transfer Case: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
NP242C Transfer Case: 1995, 1996, 1997, 1998, 1999
NP243C Transfer Case: 1998, 1999
NP233C Transfer Case: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002

Dodge:
NP203 Full Time Transfer Case: 1974, 1975, 1976, 1977, 1978, 1979
NP205 Transfer Case in W250, W350 with Cummins Diesel and 5 Speed Manual Transmission: 1989, 1990, 1991, 1992, 1993
NP208D Transfer Case: 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987
NP207D Transfer Case: 1986, 1987
NP241D Transfer Case: 1988, 1989, 1990, 1991, 1992, 1993
NP231D Transfer Case: 1988, 1989, 1990, 1991, 1992, 1993

Ford:
NP205 Part Time, Direct Mount Transfer Case: 1973, 1974, 1975, 1976, 1977, 1978, 1979
NP203 Full Time, Direct Mount Transfer Case: 1974, 1975, 1976, 1977, 1978, 1979
NP208F Transfer Case: 1980, 1981, 1982, 1983, 1984, 1985, 1986

Jeep:
NP208J Transfer Case: 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988
NP228J, NP229J Transfer Case: 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
NP207J Transfer Case: 1984, 1985, 1986, 1987
NP231J, NP242J Transfer Cases: 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
NP249J Transfer Case: 1997, 1998, 1999, 2000, 2001, 2002