bigbadchev84
1/2 ton status
So I just bought an angle finder today, So where exactly do I take the measurements from? The driveline? axle housing, yoke?
CK5
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finding driveline angles
- Thread starter bigbadchev84
- Start date
You first need to have the vehicle on level ground. You will be taking a measurement in 3 places. Take a measurement of the driveshaft angle, now remove the shaft and put the angle finder on the t-case yoke, and once again on the diff yoke. That will give you all the numbers you need to figure out what you need for shims.
FYI. I have had to play with my pinion agles a lot to get the vibs out. every vehicle is different and now that I changed the rear shackles I have to do it again. I phased it in and it got worse at freeway speeds. Now I am going to point the rear pinion at the tcase and see what happens. I went from 4deg to 6deg and now I am going to 0shim it and see what happens.
make sure you account for axle wrap and have your pinion pointed down 1-2* or so
Ok. I have made the change and I have minimized the vibes. I now think I need to work on the tcase( like rebuild or replace the damn thing.) I still get a vibration between cruise and accelleration when driving at speeds. It could be play at the slip yolk.
put it in N and parking brake, then get under there and if the slip yoke moves at all you need some repair.
Yep that is for tomorrow's project.
bigbadchev84
1/2 ton status
Ok here goes:
Driveline-20degrees
Axle yoke-10degrees
transfercase-5degrees
Driveline-20degrees
Axle yoke-10degrees
transfercase-5degrees
if you would, draw a pic for me....
bigbadchev84
1/2 ton status
Sorry but I dont have paint on this computer, What needs explained better?
i just have teh dumb
bigbadchev84
1/2 ton status
so where do i go from here?
Ok, here is your problem. With the driveline at 20 degrees and the t-case at 5 degrees that equates to a 15 degree working angle on the front U-joint and with the axle being 10 degrees that equates to a 10 degree working angle on the rear U-joint. The front and rear U-joints need to be within 1 working degree of each other or you will get vibrations. Ideally you don't want more than a 3 degree working angle on the U-joints but with a short wheel base rig that is impossible to achieve. Your best solution is a CV joint on the rear shaft then point the axle 2 degrees down from pointing directly at the t-case.
Here is a good piece of material for you to read. http://www.spicerparts.com/measuring.asp
