QU50403 Heavy Duty Timken® Diff/Wheel Taper Bearing

QU50403 Heavy Duty Timken® Taper Bearing is most commonly used in axle differential and wheel bearing applications. This is a First Class, original equipment quality bearing that meets or exceeds all vehicle manufacturer specifications making it the top choice for heavy-duty applications like yours. Country of origin may vary as Timken produces Bearings in plants located around the globe, however QU50403 is almost always made in either Canada or the United States.

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:
Always Replace
Matching Bearing Cup
Matching Parts for IHC Dana 70 Front Axles
Matching Parts for Jeep M715 Rear Axles
Matching Parts for Dana 70HD Rear Axles
Matching Parts for Dodge Dana 80 Rear Axles
Matching Parts for Ford Dana 80 Rear Axles
Matching Parts for GM Dana 80 Rear Axles
Matching Parts for 10.25" and 10.5" Rear Axles
Lubrication and Adjustment
Applications

Tech Note 1: Always Replace
Always replace the cup and cone at the same time.

Tech Note 2: Matching Bearing Cup
The matching Bearing Cup is QU50402.

Tech Note 3: Matching Parts for IHC Dana 70 Front Axles
Matching Parts for 1961-1968 IHC Dana 70 Front Axles:
QU50402 Timken Inner Wheel Bearing Cup
QU50705 Timken Outer Wheel Bearing Cup
QU50680 Timken Outer Wheel Bearing
QU50645 Wheel Seal
QU15006 6 Bolt Hub Gasket
QU90018 Pyroplex Synthethic Grease

Tech Note 4: Matching Parts for Jeep M715 Rear Axles
Matching Parts for 1967-1969 Jeep M715 Rear Axles:
QU50402 Timken Inner Wheel Bearing Cup
QU50568 Timken Outer Wheel Bearing Cup
QU50569 Timken Outer Wheel Bearing
QU50717 Rear Wheel Seal
TK8338 Premium Rear Wheel Bearing Kit with Tools
TK8339 Premium Rear Wheel Bearing Kit without Tools
QU15003 8 Bolt Rear Axle Shaft Flange Gasket
QU40577 Locking Bushing Cone for Rear Axle Shaft
QU15004 Spindle Nut Lock Washer
QU90018 Pyroplex Synthethic Grease

Tech Note 5: Matching Parts for Dana 70HD Rear Axles
Matching Parts for Many Dana 70HD Rear Axles:
QU50402 Timken Differential Bearing Cup
QU40078 Axle Shaft Flange Gasket, most Dodge and Ford
QU30010 Axle Shaft Flange Gasket, Chevy and GMC
QU40577 Locking Bushing Cone for Vintage Rear Axle Shafts
QU90008 Gear Marking Compound
QU40367 Dana 70 Differential Cover Gasket
QU42030 Reusable Dana 70 Differential Gasket
TM4400 Pinion and Differential Bearing Service Manual for Dana Monobeam Axles
QT1032 Differential Case Spreader

Tech Note 6: Matching Parts for Dodge Dana 80 Rear Axles
Matching Parts for Dodge Dana 80 Rear Axles:
QU50402 Timken Differential Bearing Cup
TK4889 Premium Differential Bearing Kit only 1994-2002
TK4659 Premium Master Differential Bearing and Seal Kit 1994-1999
TK4778 Premium Master Differential Bearing and Seal Kit 2000-2002
QU50437 Standard Differential Bearing and Seal Kit
QU40213 Dana 80 Differential Shim Kit
QU40260 Outboard Differential Bearing Spacer Set
QU40078 Axle Shaft Flange Gasket, most Dodge
QU40491 Bare Differential Case for 3.54 Ratio
QU40490 Bare Differential Case for 4.10 Ratio
QU42031 Reusable Differential Cover Gasket
TM4400 Pinion and Differential Bearing Service Manual for Dana Monobeam Axles
QU90008 Gear Marking Compound
QT1032 Differential Case Spreader
Exploded View XV2011 2000-2002 Dodge Ram 2500, Ram 3500 Dana 80 Rear Axle

Tech Note 7: Matching Parts for Ford Dana 80 Rear Axles
Matching Parts for Ford Dana 80 Rear Axles:
QU50402 Timken Differential Bearing Cup
QU50437 Differential Bearing and Seal Kit
QU40213 Dana 80 Differential Shim Kit
QU40606 1996-2000 Outboard Differential Bearing Spacer Set
QU40078 Axle Shaft Flange Gasket for E350 and E450 Vans
QU40241 Axle Shaft Flange Gasket for 1988-1991 F350 and 1995-1998 F450
TM4400 Pinion and Differential Bearing Service Manual for Dana Monobeam Axles
QU90008 Gear Marking Compound
QT1032 Differential Case Spreader

Tech Note 8: Matching Parts for GM Dana 80 Rear Axles
Matching Parts for Chevy and GMC Dana 80 Rear Axles:
QU50402 Timken Differential Bearing Cup
QU50437 Differential Bearing and Seal Kit
QU40213 Dana 80 Differential Shim Kit
QU40606 Outboard Differential Bearing Spacer Set
TM4400 Pinion and Differential Bearing Service Manual for Dana Monobeam Axles
QU90008 Gear Marking Compound
QT1032 Differential Case Spreader

Tech Note 9: Matching Parts for Sterling 10.25" and 10.5" Rear Axles
Matching Parts for Ford Sterling 10.25" and 10.5" Rear Axles:
QU50402 Timken Differential Bearing Cup
QU50788 Basic Differential Side Bearing Shim Kit
QU40400 Rear Differential Cover Gasket
QU42032 Spicer Reusable Differential Cover Gasket
QU20004 Axle Shaft O-Ring
QU50544 Differential Bearing and Seal Kit 1985-1997 10.25" Axle
QU50594 Differential Bearing and Seal Kit 1999-2007 10.50" Axle
QU50881 Differential Bearing and Seal Kit 2008-2010 10.50" Axle
QU90008 Gear Marking Compound

Tech Note 10: Lubrication and Adjustment
To obtain maximum life from a wheel bearing it must be properly lubricated and adjusted. Given the multiple fitments of this bearing, it is impossible to provide specific lubrication and adjustment specifications for all applications, however here are some general guidelines.

4x4 Front Wheel Bearings: All spaces between the bearing rollers must filled by packing the bearing with clean, quality grease. Packing grease between the bearing rollers can be accomplished several ways. I prefer using QT5500 bearing packer, but whatever method is used requires clean hands, a clean bearing, and clean grease. Also make sure the hub and bearing cup are cleaned of all old lubricant, metal chips, and dirt. For grease, I use QU90018 Pyroplex synthetic grease, but most NLGI #2 greases rated for high temperatures will work. Some additional grease should be used to coat the bearing cups and wheel seal lip, plus the area in the hub between the bearings should have some extra grease to provide additional bearing lubrication, but do not completely fill the space between the bearings with grease. Wheel bearing adjustment specs vary by vehicle, but most applications call for end-play in the 0.001" to 0.010" range.

Rear Wheel Bearings: When used on rear full-float axle applications, the long term wheel bearing lubrication is provided by oil from the differential that flows down the axle tubes and gets trapped in the wheel hubs. However, the bearings must be lubricated to provide initial lubrication until oil from the diff works it's way down. On older trucks with simple grease seals, most shop manuals will call for packing or at least coating the bearings with grease. With most later model trucks using oil-bath seals, the bearings are coated with gear oil and also some gear oil is put in the wheel hub space between the 2 bearing cups. Again, wheel bearing adjustment specs will vary by vehicle, but most manuals specify 0.001" to 0.009" end-play.

Applications

Chevy and GMC:
Rear Differential Side Bearing Cup for Dana 70HD Rear Axles: 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
Rear Differential Side Bearing Cup for Dana 80 Rear Axle: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000

Dodge, Ram, Sterling:
Rear Differential Side Bearing Cup for Ram 2500, Ram 3500 3/4 ton and 1 ton Dana 80 Rear Axles: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002

Ford:
Rear Differential Side Bearing Cup F250, F350 with Sterling 10.25" Rear Axle: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
Rear Differntial Side Bearing Cup F250, F350 with Sterling 10-1/2" Rear Axle: 1999-up
Rear Differential Side Bearing Cup F350, F450 with Dana 80 Rear Axle: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

International
Inner Front Wheel Bearing Cup 1 Ton 130 and 1300 Series 4x4 with Dana 70 Closed Knuckle Front Axle: 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968

Jeep:
Inner Rear Wheel Bearing Cup for M715, M725, M726 1-1/4 Ton Military 4x4 Truck: 1967, 1968, 1969