QU40815 Dana 50 IFS Right Axle Shaft Slip Yoke

QU40815 Dana 50IFS Right Axle Shaft Slip Yoke is a genuine Dana original equipment replacement splined Slip Yoke for all 1983 to 1997 Ford F-250 and 1983-1985 Ford F-350 4x4 trucks equipped with the Dana 50 IFS Twin Traction Beam® Front Axle. The yoke side of QU40815 is attached to the Right Differential Output Shaft by the center axle u-joint and the splined side takes the right inner axle shaft.

Also available while supplies last: QU40815U Used Dana 50IFS Right Axle Shaft Slip Yoke.

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:
U-Joint Type
Dimensions
TK40719 Premium Cold-Forged U-Joint
Slip Yoke
Axle Shaft
Before Installing
Installing
Operation Failures
Matching Parts
Applications

Tech Note 1: U-Joint Type
QU40815 takes an external snap ring type universal joint made to Spicer 1350 series dimensional specifications. The u-joint cup diameter is 1-3/16". The overall width is 3-5/8". See TK40719 and QK4874 Universal Joints.

Tech Note 2: Dimensions
QU40815 is approximately 4-13/16" long from center of u-joint hole to end of spline. 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: TK40719 Premium Cold-Forged U-Joint
When TK40719 Premium Cold-Forged U-Joint is used as an Axle U-Joint, the beefed up axle yokes on 1980-1997 Ford Dana 50IFS front axles can pose installation problems unless the inside of the yoke ears are slightly modified with a file. Once you modify your new or good condition used axle shafts, TK40719 will just barely clear the yokes as you pivot the cross into place. Since TK40719 is the strongest production u-joint I know of, I believe the slight inconvenience of filing the yokes is well worth the effort.

Tech Note 4: Slip Yoke
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: Axle 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 a shaft with worn splines is only a short term repair which will quickly fail.

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

Tech Note 7: Installing
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: Operation 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
Interactive Exploded View XV1010DT 1995, 1996, 1997 Ford F250 Dana 50IFS Axle
TK40719 and QK4874 Universal Joints
QU40085 Small Boot Clamp
QU40084 Large Boot Clamp
QU40572 Slip Yoke Boot (1983-1997)
QU40557 Inner Slip Yoke Seal 1983.5-1997
QU40435 Right Inner Axle Shaft
QK4774 Right Axle Shaft Assembly
QU40226 Snap Ring, Right Diff Output Shaft 1983-1997
QU40088 Right Axle Shaft Seal 1983-1997
QU40515 Diff Output Shaft Support Bearing 1983-1997
QU40571U Used Differential Output Shaft 1983-1997
QU40534 Right Differential Output Bearing and Seal Kit 1983.5-1997
QU90018 Pyroplex® Protection ES NLGI #2 GC-LB Water Resistant Synthetic Grease
Ford Shop Manuals

Applications:
Ford:
F-250 with optional Model 50 4600 pound Front Axle: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
F-350: 1983, 1984, early 1985
F-250 (Most if not all F250's in these years have a Dana 50 Front Axle): 1995, 1996, 1997