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Jeep Wrangler YJ
YJ General Discussion
Driveline angles and new vibration
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<blockquote data-quote="machoheadgames" data-source="post: 438648" data-attributes="member: 18789"><p>Overall I agree that there really is no way to truly win when you’re stuck between lift and no SYE. The first thing I did to my YJ 10 years ago was a 2.5” lift from rough country. Broke high school kid and needed clearance for the 31’s that came on the Jeep. Hindsight, should have reverted it to stock rims and tires, but I didn’t. The RC springs come with 6° shims on them. I initially did not run a tcase drop. The vibes were absolutely terrible. Installed a t-case drop, which helped considerably, but it still was not right. I ran that way for about a month while I saved for SYE/DC shaft…I don’t think it would have worked very well longer term with the pinion pointed up 6° extra and the tcase pointed down. It made for an odd looking setup similar to the photos in this post. Eventually, I swapped to the SYE and double cardan, which with the 6° shims and deleting the t-case drop, was perfect.</p><p></p><p>After all I learned from that experience, I started recommending to others (who installed 2.5”ish lifts) to do a small t-case drop and 2° shims. Pretty much all of those have turned out well. I don’t know what their operating angles are - probably outside of the max. Maybe they need to replace joints more often. I don’t really know. I did only suggest this as a temporary fix. I figure parallel with higher angle is better than how it looks in those pics, because the way it looks is how mine was for a month and I really didn’t like it. </p><p></p><p>Overall should probably just leave the Jeep stock until a plan is in place to fix immediately, unless willing to park it after lifting.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 438648, member: 18789"] Overall I agree that there really is no way to truly win when you’re stuck between lift and no SYE. The first thing I did to my YJ 10 years ago was a 2.5” lift from rough country. Broke high school kid and needed clearance for the 31’s that came on the Jeep. Hindsight, should have reverted it to stock rims and tires, but I didn’t. The RC springs come with 6° shims on them. I initially did not run a tcase drop. The vibes were absolutely terrible. Installed a t-case drop, which helped considerably, but it still was not right. I ran that way for about a month while I saved for SYE/DC shaft…I don’t think it would have worked very well longer term with the pinion pointed up 6° extra and the tcase pointed down. It made for an odd looking setup similar to the photos in this post. Eventually, I swapped to the SYE and double cardan, which with the 6° shims and deleting the t-case drop, was perfect. After all I learned from that experience, I started recommending to others (who installed 2.5”ish lifts) to do a small t-case drop and 2° shims. Pretty much all of those have turned out well. I don’t know what their operating angles are - probably outside of the max. Maybe they need to replace joints more often. I don’t really know. I did only suggest this as a temporary fix. I figure parallel with higher angle is better than how it looks in those pics, because the way it looks is how mine was for a month and I really didn’t like it. Overall should probably just leave the Jeep stock until a plan is in place to fix immediately, unless willing to park it after lifting. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Driveline angles and new vibration
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