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Old 11-18-2019, 11:34 PM
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UCF Ultra Skid + 4" lift too much?

I have a 2006 TJ with 6 speed, dana 44 and 4” RE lift. It has a slip yoke eliminator with a no name 1310 double cardan shaft.
Problem arised when I added a UCF ultra high clearance skid with low pro mount, 1” motor mount, and 1” body lift. It pushed the t-case output up about 1.5”.
My double cardan sits at 22 degrees at ride height, but at full droop it extends out to 30 degrees and just starts to bind.

Would a super short sye, a higher quality joint or any other idea help? Or am I just stuck having to lower the skid?

I’d appreciate any advice you may have,
Thanks.

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Old 11-19-2019, 11:13 AM   #2
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A super short sye would certainly help with a bit longer driveshaft. That will eliminate the bind at the h yoke as well as lower your angles. You could try filing the h yoke to get a degree or two more of range. If you do go with a super short sye, factor in the cost of a speedo healer, anywhere from $50 DIY to $140

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Old 11-19-2019, 12:12 PM   #3
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Also, while any bind potential should be addressed, keep in mind that your suspension will never be at full droop unless you are doing high speed stuff (jumping) or right on the edge of going end over end...

It needs to not bind and break but it doesn't need to run that way for extended time...

Another cheap option would be limiting straps if you just needed a couple degrees

Put em inboard of the frame and they'll have more effect on droop and less effect on articulation
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Old 11-19-2019, 03:31 PM   #4
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Do you have a motor mount lift ? that should also reduce your driveshaft angle. Edit: never mind saw that you installed a 1 inch MML with the skid kit, looks like your stuck with getting super short sye and a longer driveshaft or a smaller lift. Ive got the Teraflex Mega Short SYE with an adams drivehshaft 4 inch lift but no tummy tuck YET and everything works good my rear driveline angles arent bad at all.
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Old 11-19-2019, 11:28 PM   #5
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Quote:
Originally Posted by Basil36 View Post
I have a 2006 TJ with 6 speed, dana 44 and 4” RE lift. It has a slip yoke eliminator with a no name 1310 double cardan shaft.
Problem arised when I added a UCF ultra high clearance skid with low pro mount, 1” motor mount, and 1” body lift. It pushed the t-case output up about 1.5”.
My double cardan sits at 22 degrees at ride height, but at full droop it extends out to 30 degrees and just starts to bind.

Would a super short sye, a higher quality joint or any other idea help? Or am I just stuck having to lower the skid?

I’d appreciate any advice you may have,
Thanks.
https://www.highangledriveline.com/
https://www.facebook.com/High-Angle-...8745380823009/
A high-angle driveshaft would give you greater range.
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Old 11-20-2019, 06:01 PM   #6
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maybe you could go to 1.5" MML?
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Old 11-20-2019, 10:25 PM   #7
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Just as an example, at ride height mine sits at ~18.7deg with a 4" spring and a Savvy skid. Full droop is 6" down. A center limit strap stops the drive shaft at the last 3/4", just before it starts to pulse when spun by hand. The final bit of shock travel is still available as flex.
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Old 11-21-2019, 09:24 AM
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Thanks for the reply’s.

I’m going to swap in a JB Conversions super short sye and a longer shaft. If it still doesn’t spin smoothly at full droop than a limiting strap is the last resort.
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Old 11-21-2019, 10:42 AM   #9
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Quote:
Originally Posted by Basil36 View Post
Thanks for the reply’s.

I’m going to swap in a JB Conversions super short sye and a longer shaft. If it still doesn’t spin smoothly at full droop than a limiting strap is the last resort.
FYI, at droop, the correct way to check the drive shaft is to disconnect and try to reinstall it both with the yoke in the horizontal and vertical position.

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