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Pinion angle ?

RAY

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Austin, Texas
The angle of my tranfer case is 4 degrees and was going to set my pinion angle at 4 degrees, is this angle too small to where I am going to be killing u-joints often?

Thanks,
Ray
 
The angle of the diff pinion should be 1-2 degrees down from where the t case one is when not under power (at Rest). This will allow for a little rotation of the axle under throttle and will help keep the angles better. 4 degrees is not much at all and should be fine. It will depend on the angle between the case and the shaft. That is the one that will cause problems if it is too much.

Put the angle finder on the trans pan then on the driveshaft and take the difference in the readings. Let us know what that angle is.
 
I have set my pinion angle at 3 degrees with the weight of the truck on the axle and jack stands, the drive shaft angle is 24 degrees transfer case output is 4 degree and the tranny pan is 0 degrees. Do you think the driveshaft angle is too severe?

Thanks,
Ray
 
T-case angle and pinion angle need to match to cancel out any vibrations. What vehicle is this in? The working angle on the u-joints should not exceed 3* to also keep from a vibration. This is all for a driveshaft with a single u-joint on each end.

What kwissman is saying is to set the pinion angle down a degree or two so that with normal operation the axle wrap will have moved the pinion back up that extra degree or so so that the pinion and t-case angles are equal while the vehicle is being driven.
 
If we do the math on the angle at the joint near the TC it is going to be running at about 20 degrees. That is quite a bit of angle for a single cardan joint (non CV). Most u-joints are not made to run at that angle continuously. I will most likely go through u-joints quickly and may vibrate.

I would check to make sure that you have clearance around the ears where the u-joint is installed. Make sure you can rotate the shaft by hand when installed with the TC in Neutral and the rear end off the ground. Check for clearance at when the cross in the joint crosses a vertical point.

If you still have questions call Jess at High Angle Driveline. He is who made my rear shaft and I have no problems at all.
 

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