#21  
Old 04-18-2012, 10:31 PM
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greystreak92
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Originally Posted by GruesomeJeans
Wow... Another set of reasons to be glad i had straight axles... I would hate to work on replacing stuff for that...
Careful what you wish for there, Gruesome.

The D44 solid front axle has a total of FOURTEEN (14) pivot points/points of attachment to the truck.

2 - track bar mounts which are a through-bolt-and-bushing design that only allow the axle to travel up and down by pivoting on the bolts/bushings while keeping it centered under the truck. There is one at the frame end and one at the axle end of the track bar.

2 - radius arm and bushings which are a bayonet-type mount that allows the radius arm to follow the arc of the axle as it articulates. So, this setup allows for both linear (up and down) motion of the arms while ALSO allowing them to rotate slightly as the axle articulates since the radius arms are semi-rigidly attached to the axle.

2 - pairs of "C" bushings (a total of four) with one pair at the front of each radius arm. Unlike the TTB axle which uses a completely rigid attachment between the axle housing and the radius arms, the solid axle REQUIRES the "C" bushings to maintain caster. LIfted truck often require the use of modified "C" bushings to keep the caster alignment correct after lifting the truck.

2 - upper ball joints which are press-fit into the knuckle and bolted to the axle housing.

2 - lower ball joints which are press-fit into the knuckle and bolted to the axle housing. Both sets of ball joints are typical ball-and-socket assemblies that allow the steering knuckle and wheel to remain perpendicular with the pavement while the suspension articulates while also allowing the knuckle to rotate as the steering angle is changed.

2- outer tie-rod ends which perform the same function they do in every other conventional steering system.

1 - inner tie-rod that attaches to the mid-point of the other inner tie-rod.

1 - inner tie-rod that attaches to the pitman arm on the steering gear. Together these two components make up the rather contrived Ford "inverted Y" steering system.

As obnoxious as folks would have you believe the TTB axle to be, it still has fewer rubber parts to go bad.