Is it worth adding a SYE?

[DUB]

With only 4.5 of lift and 33's, is an SYE worth spending the coin on right now? Have no vibes.

 

[macleanflood]

That's what I did...but I was planning on headed towards 35s. That and I had to cut the 1" square tube the PO used as a drop spacer for my skid plate to get the bolts off...had to replace the nutserts too.

And it's not just a SYE... it's a driveshaft too and if it's a super short then it's also something for your speedometer. And it also might be at the least lower rear control arms for pinion angle. Oh, and a cable shifter for the transfer case after you can't get the linkage to work right.

-Mac

 

[TRevs]

If it ain’t broke, don’t fix it…

That said, 4” of spring lift would usually cause vibrations. You may develop vibrations in the not-too-distant future once your U-joints suffer premature wear

 

[DUB]

If it ain’t broke, don’t fix it…

That said, 4” of spring lift would usually cause vibrations. You may develop vibrations in the not-too-distant future once your U-joints suffer premature wear

I have 3.5 spring and a 1" body lift with a 1" MML. No spacers under the belly plate and have never had an issue. Was at least planning to replace the U joints while it's on the lift

 

[hear]

I tried to do a 4" lift w/o adjustable arms, was a definite no-go for me. If you get >= 4" you should be planning on SYE, driveshaft, adjustable arms. Or a TC drop instead, I guess.

I'll also add that I wouldn't really describe what I had as vibrations. Honestly, it felt more like the jeep was always in the wrong gear. I added the adjustable arms with the correct pinion angle and everything was great again. I realize that's a weird way to describe it, but it's what I've got.

 

[Jerry Bransford]

I have 3.5 spring and a 1" body lift with a 1" MML. No spacers under the belly plate and have never had an issue. Was at least planning to replace the U joints while it's on the lift

Your 1" MML is why you're not getting vibrations with your 3.5" suspension lift. Since you're not getting vibrations I'd leave it as-is.

If you replace your driveshaft u-joints avoid store brands, I'd go with the Spicer 5-1310x u-joints which are a significantly stronger/more durable direct replacement for the base-level Spicer u-joints the factory installed. If you want to also replace the u-joints on the front axles I'd go for the Spicer 5-760x which is also a significantly stronger more durable direct replacement.

 

[TheBoogieman]

I have 3.5 spring and a 1" body lift with a 1" MML. No spacers under the belly plate and have never had an issue. Was at least planning to replace the U joints while it's on the lift

Leave it alone.

 

[DUB]

Thanks f

Your 1" MML is why you're not getting vibrations with your 3.5" suspension lift. Since you're not getting vibrations I'd leave it as-is.

If you replace your driveshaft u-joints avoid store brands, I'd go with the Spicer 5-1310x u-joints which are a significantly stronger/more durable direct replacement for the base-level Spicer u-joints the factory installed. If you want to also replace the u-joints on the front axles I'd go for the Spicer 5-760x which is also a significantly stronger more durable direct replacement.

Thanks for the part numbers. Ordered!

 

[DUB]

Also looking underneath, there is a dry oil patch on the floor board, looks like it was slinging oil from the T-case seal at one time.. Dirty but not wet, wonder if PO replaced the seal or if it's intermittent??

 

[TheBoogieman]

Also looking underneath, there is a dry oil patch on the floor board, looks like it was slinging oil from the T-case seal at one time.. Dirty but not wet, wonder if PO replaced the seal or if it's intermittent??

Clean it off and see if the dirt is stopping a leak.

 

[OldBuzzard]

Freshly greased U-joints will sling grease like that, leaving a mess.

 

[DUB]

Freshly greased U-joints will sling grease like that, leaving a mess.

It's right above the T-case balancer...

 

[TheBoogieman]

Freshly greased U-joints will sling grease like that, leaving a mess.

Mine aren't greaseable.

 

[DUB]

Yeah, mine also.

 

[TheBoogieman]

It's right above the T-case balancer...

Rear output shaft on the t-case? I just changed mine.

 

[DUB]

Rear output shaft on the t-case?

Correct.

 

[chudlet]

LOL with questions like that, I hear a Tummy Tuck in your future :-D

 

[DUB]

LOL with questions like that, I hear a Tummy Tuck in your future :-D

Stop the bleeding!