QU40334 Greaseable Dana 44IFS Right Axle Shaft Slip Yoke Assembly

QU40334 Greaseable 1980-1982.5 Dana 44IFS Right Axle Shaft Slip Yoke with Press On Seal is a genuine Dana original equipment replacement splined Slip Yoke for 1980 to 1982.5 Ford Bronco, F-150 and standard F-250 4x4 trucks equipped with the Dana 44 IFS Twin Traction Beam® Front Axle. The yoke side of QU40334 is attached to the Right Differential Output Shaft by the center axle u-joint and the splined side takes the right inner axle shaft.

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Dan the Gear Man® Tech Notes:
U-Joint Specs
Yoke Specs
Design Change
Diff Output Shaft Type
Replace Matching Shaft
Grease
Phasing
Failures
Matching Parts
Applications

Tech Note 1: U-Joint Specs
QU40334 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: Yoke Specs
QU40334 is approximately 5-1/2" long from center of u-joint hole to end of seal. The 30 based on 31 splined end has one spline that is a double width spline so even though it has 30 splines, it will fit 31 spline axle shafts.

Tech Note 3: Design Change
When Ford originally introduced The Dana 44IFS Axle at the start of the 1980 model year, QU40334 Greaseable Slip Yoke with factory installed Seal was used. I believe it was in the middle of the 1982 model year that Ford started using QU40626 Non-Greaseable Slip Yoke protected by QU40572 Boot. The two Slip Yoke types are interchangeable as the yoke lengths and Right Axle Shaft are the same. I prefer the Booted Joint, but many offroaders like the greaseable type.

Tech Note 4: Diff Output Shaft Type
The Axle Shaft Slip Yoke u-joint connects to the right differential output shaft. Ford used two types of diff output shafts. Early production diff output shafts use QU40173 Tapered Roller Bearing Kit and can be removed by unbolting the 3 bolt external bearing retainer flange from the diff housing. Later production diff output shafts (circa 1983 and after) are retained by a snap ring at the inboard end of the diff output shaft. For these axles, you must remove the differential housing from the left axle beam to access the snap ring (It is not as big a job as it sounds, just 12 bolts and some grunt work).

Tech Note 5: Replace Matching Shaft
If you are replacing your old slip yoke due to spline wear, you also need to replace the matching axle shaft. Installing a new yoke on an old shaft with worn splines is only a short-term repair which will quickly fail.

Tech Note 6: Grease
Always pre-grease the axle shaft and slip yoke splines before assembly with QU90018 or similar NLGI #2 GC-LB water resistant grease.

Tech Note 7: Phasing
When starting the axle shaft splines into your new Slip Yoke, verify that the Slip Yoke and Right Axle Shaft are as close to being in phase as possible. (The center line of the yoke holes line up to each other with little or no offset.)

Tech Note 8: Failures
IFS Axle Shaft Slip Yoke Failures operating failures are usually a result of either a broken axle u-joint or lack of lubrication for the splines. 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 C-Frame Press with the correct adapters is both the safest and best way to remove or install axle u-joints.

Tech Note 9: Matching Parts
Matching parts and tools for QU40334 Right IFS Axle Shaft Slip Yoke are:
QU40173 Right Differential Output Bearing and Seal Kit 1980-1983.5
QU40534 Right Differential Output Bearing and Seal Kit 1983.5-1996
QU40087 Left Axle Shaft Seal
QU40088 Right Axle Shaft Seal 1983.5-up
QU40058 Outer Axle Shaft Slinger 1980-1992
QU40228 Spindle Bearing and Seal Kit 1980-1992 for Outer Axle Shaft
QU40626 1983-1996 Non-Greaseable Slip Yoke (Will Fit 1980-1996)
QU40616 Right Axle Shaft for F250
QU40263 Right Axle Shaft for Bronco and F150
TK40712 and QU90007 Axle U-Joints
S82194 Ultra Grey RTV Sealant to seal diff housing to left axle beam
QU90018 Pyroplex® Protection ES NLGI #2 GC-LB Water Resistant Synthetic Grease

Applications

Ford:
1980-1982 Original Equipment on Bronco, F150
1980-1982 Original Equipment on F250 with Dana 44IFS Front Axle
1983-1996 Bronco, F150 Will Fit If You Prefer Seal instead of Boot
1983-1996 F250 with Dana 44IFS Front Axle Will Fit  Will Fit If You Prefer Seal instead of Boot