Replacing a Halfshaft
Updated July 31, 2008
Note: there is one difference between halfshafts on trucks newer then 1998. These halfshafts have a 'tone ring' on them which looks like a ring gear. It's located on the shaft next to the geared hub. There is a magnetic pickup that is located right next to the ring that senses the pulses and acts as a speed sensor for the ABS and TT4 systems. If you don't install the proper shaft your TT4 and ABS will not work. The tone rings are removeable and replaceable (but can be quite delicate) as long as the original shaft was designed for them. They will not fit on the older non-TT4 shafts (94-98) without some machine work.
The origin of many TT4 and ABS errors codes is from this location. The sensor can be full of dirt, pushed away from the tone ring so It can't sense it's rotation or the tone ring itself can be broken.
Jack up the truck under the A-arm and remove the tire and wheel. Remove the access plug from the hub with a 3/8" drive extension and a ratchet.
Remove the 3/8"-16x1.25 Halfshaft Retaining Bolt using a 9/16" socket
Remove the 6 - 15mm bolts from the rotor
The halfshaft will drop down on the A-arm. If it gets hung up just put a crowbar between the rotor and the halfshaft and they will seperate easily.
Slide the halfshaft out of the geared Hub and Remove it from the Truck
The washers come pre-assembled in pairs, cam face on cam face. When the bolt and/or nut is tightened, the teeth grip and seat the mating surfaces. The washer is locked in place, allowing movement only across the face of the cams. Any attempt from the bolt/nut to rotate loose is blocked by the cam effect. The increase of tension makes the bolt/ nut self-locking.
Install the halfshaft the opposite way you removed it.
- Slide the halfshaft back into the Geared Hub
- Put threadlocker on the retaining bolt and tighten to 37 ft/lbs.
- Install the access plug with some teflon sealer and tighten to 8 - 13 ft/lbs.
- Put Locktite 272 threadlocker on the 6 bolts and install the halfshaft to the rotor with the Nord-Lock washers. Tighten to 57 ft/lbs.