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General Forums => The Mess Hall => Topic started by: lokitim on March 03, 2013, 08:15:38 AM
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I put an AX15 with SYE in my 93, it runs good but seems to be noisier (vibration?). Jeep has a 4" lift & t/c drop. I know the rear yoke should be clocked up more. How do I figure this, shim size? Or has someone got the same setup & can let me know what shims to use?
Thanks
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Do you have a CV or standard joints? If you have a CV then it's supposed to be inline. Standard U-joint needs to be set so the upper and lower joints are at the same angle. 2-3* down is OK as drive line torque will move it 2-3* up.
The best way to set the pinion angle is to re-position the spring perches and perhaps the shock mounts as well. Shims are OK but I'd be sure to get steel shims as aluminum shims tend to crack if the U-joints are remotely loose. Shims come in degrees. Usually 2*, 4*, 6* and 8*. You need to measure your drivesaft angle and adjust it appropriately. You could also adjust the pinion angle my adding lift shackles.
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if you have an SYE and CV driveshaft then get rid of the t-case drop, then like Jeffy said align the diff yoke so it's inline with the driveshaft (or slightly under and not over). If you don't have a CV d/s then i suggest getting one (otherwise it kind of defeating the purpose of getting an SYE.
for setting the angle on a non CV d/s you need your diff yoke at the same angle as your t/case rear output yoke, otherwise you'd get major vibrations, i had the same thing happening when i put a t-case drop and had to change the angle shims).
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(http://4xshaft.com/images/cv_angle.gif)
(http://4xshaft.com/images/2joint_angle.gif)
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Thanks, so as I understand, I'll get rid of t/c drop & adjust angle of rear, using shims as I don't have welder, etc. to do much more. (I do have cv shaft)
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Correct. Definitely lose the TC drop.