Front axle pinion angle seems wrong?
#1
Front axle pinion angle seems wrong?
I have a 75 highboy, and noticed the front axle looks like the angle is off. I am guessing the pinion should be parallel to the frame, and not pointing toward the ground. It ends up putting the front u-joint at more of an angle than it really needs to be.
Why is it the front and rear axles dont just point to the t-case? That would leave virtually no angle for the u-joint to be fighting, right?
Why is it the front and rear axles dont just point to the t-case? That would leave virtually no angle for the u-joint to be fighting, right?
#3
im pretty sure it is supposed to be like that i cant rember and my truck is currentally torn apart to lift it... but the leaf pads on the axle are built into the diff(one of them is atleast) and you cant move your pinion angle without a shim so look to see if there is a shim in there otherwise its stock..
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#9
Thats pretty close to the same as mine too. So this can be fixed in part by adding some degreed shims to turn the axle? Is there any reason I cant relocate the leaf spring pads/blocks (whatever they are)? I am a very competent fabricar;
End result is I would like to have the pinion "pointing" at the t-case to reduce the driveline angle. I could have sworn that somewhere in my past I remember someone saying its a bad thing to do
End result is I would like to have the pinion "pointing" at the t-case to reduce the driveline angle. I could have sworn that somewhere in my past I remember someone saying its a bad thing to do
#10
As I understand it, if you have a two u-joint shaft front shaft, the output of the front differential has to be parallel to the front output of the transfer case. If you have a three u-joint front shaft, the output of the front differential has to be pointed at the front output of the transfer case.
Here are some pics from Tom Wood's website to help explain:
Even though these show rear shafts, fronts shafts would have to follow the same rules.
Here are some pics from Tom Wood's website to help explain:
Even though these show rear shafts, fronts shafts would have to follow the same rules.
#11
^100% Correct^
The front output on the t-case is either parallel to the earth or slightly north of parallel. The front pinion would then need to be either parallel or a slightly south of parallel to keep the yokes on the same plane. All of this being in the name of smooth, vibration free operation. I always felt that my pinion pictured above was exaggerated by the well worn front spring pack.
-Jared
The front output on the t-case is either parallel to the earth or slightly north of parallel. The front pinion would then need to be either parallel or a slightly south of parallel to keep the yokes on the same plane. All of this being in the name of smooth, vibration free operation. I always felt that my pinion pictured above was exaggerated by the well worn front spring pack.
-Jared
#12
I'm not certain that's the case, reason being, as the spring pack fatigues over time and the pack flattens out the pinion angle remains on the very same plane, its angle is not altered due do the worn springs.
#13