QU40673 30 Spline Left Inner Axle Shaft for 1973-1979 Ford 1/2 Ton

QU40673 30 Spline Left Inner Axle Shaft for 1973-1979 Ford 1/2 Ton Dana 44 Front Axles is a brand new, genuine Dana original equipment replacement drivers or short side inner axle shaft for all 1973-1979 Ford F100, F150 4x4 trucks and 1978-1979 Ford Broncos with Dana 44 open knuckle front axles.

QU40673U Used Left Inner Axle Shaft also available while supplies last

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:
Matching U-Joints
Ford F100 and F150
Ford Bronco
Common Causes of Operating Failures
Common Causes of Seal Leaks
Matching Parts
BOM Numbers
Applications

Tech Note 1: Matching U-Joints
QU40673 Axle Shaft takes universal joints made to Spicer 1350WJ dimensional specifications. The cup diameter for these u-joints is 1-3/16". The 4 cups are grooved to accept Inside C-Clip Snap Rings. The installed Clips fit against the machined inner faces of the axle shaft yokes. The distance between the inside of the axle shaft yoke ears is 2-3/16". For matching u-joints, see TK40712 and QU90007.

Tech Note 2: Ford F100 and F150
For 1976, Ford introduced the 4x4 F-150 as a higher capacity four wheel drive 1/2 ton that would be exempt from certain emissions regulations. For most Ford 4x4 truck buyers, the F150 trucks quickly became the choice over the F100 leading to the 4x4 option being dropped for the F100 after the 1977 model year. For the 1976 and 1977 years, F100 and F150 4x4 trucks share the same front axle.

Tech Note 3: Ford Bronco
A small axle u-joint version of the Dana 44 was used in Bronco front axles through 1977. For the 1978 and 1979 model years, the Bronco was built on a chassis based on the F150 and it had the same Dana 44 front axle components as were used in the F150 for the same years.

Tech Note 4: Common Causes of Operating Failures
Inner axle shaft operating failures are usually a result of a broken axle u-joint. Good preventative maintenance can usually prevent those type of failures. A good number of axle shafts are also wrecked by poor service procedures during u-joint replacement. Over the years I have seen a lot of axle shafts with bent or broken yokes caused by the slam-bang u-joint removal and installation methods. A QT1065M C-Frame Press with the correct adapters is both the safest and best way to remove or install axle u-joints.

Tech Note 5: Common Causes of Seal Leaks
Axle shaft seal leaks on older vehicles can occur any time an axle shaft is removed and replaced/reinstalled. The most common causes are the inner axle shaft seal lip has become worn and brittle with age and/or crud in the axle tube was pushed into the seal when the axle shaft was installed. The best thing to do is to replace the inner axle shaft seals before reassembling your axle, but you MUST remove the differential to replace the seals. With either new or old seals, always make sure the splines and seal surface on your inner axle shaft is clean and dry before installing the axle shaft.

Tech Note 6: Matching Parts
Matching parts for QU40673 Left Inner Axle Shaft are:
QU40672 Right Inner Axle Shaft 1973-1979 F100, F150, and 1978-1979 Bronco
QU40158 Outer Axle Shaft 1973-1979 F100, F150, and 1978-1979 Bronco
QU40192 Spindle for 1976-1979 F100, F150, and 1978-1979 Bronco
QU40055 Inner Axle Oil Seal for 1973-1977
QU40160 Inner Axle Oil Seal for 1978-1979
TK40712 and QU90007 Axle U-Joints
QU40178 30 Spline Dana 44 Differential Inner Part and Gear Kit
QU20348 5 Bolt Disc Brake Hub for 1976-1979 F100, F150 and 1978-1979 Bronco
QK4727 Round, 4 Slot Spindle Nut Kit for vehicles with solid drive gears or manual hubs
QT1025 4 Lug Spindle Nut Socket

Tech Note 7: BOM Numbers
QU40673 Left Inner Axle Shaft was used with 610066 and 610067 BOM numbers.

Applications
Ford:
F100: 1973, 1974, 1975, 1976, 1977
F150: 1976, 1977, 1978, 1979
Bronco: 1978, 1979