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Old 09-26-2010, 12:44 PM
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Question How do you know if you have a SYE

Is the only way to take apart the TC and see or is there another way? I seem to recall when I first bought the Jeep and had some work done on the TC the mechanic mentioned it but not sure if it's my imagination. So how do you check? Thanks

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Old 09-26-2010, 01:06 PM   #2
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post up a pic of it, we can tell ya.

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Old 09-26-2010, 01:41 PM
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Really? Ok give me a sec, didnt know you could tell from a pic be back.
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Old 09-26-2010, 01:49 PM
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not sure what pic you needed, yeah she's a little dirty. Hope this helps
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Old 09-26-2010, 01:51 PM   #5
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Yes thats a sye with a cv style drive shaft. Good setup.
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Old 09-26-2010, 01:55 PM
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Ok stupid question...where do you see that?
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Old 09-26-2010, 01:59 PM   #7
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That piece where the drive shaft connects to the t-case. I know mine a slip yoke and is much longer. Yours is a fixed yoke and shorter so theres your SYE aka slip yoke eliminator. The CV style drive shaft you can tell it is one by how it has the to joints right at the fixed yoke on the t-case and it also has that slip joint (where the blue is).
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Old 09-26-2010, 02:05 PM
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AH I see said the blind man to the deaf dog. So the the drive shaft normally connects straight to the t-case and there's an adapter on mine aka the Slip yoke? I'm starting to get it now, thanks. So if i wear to do the tummy tuck I would need a longer drive shaft, now would I still need this CV style shaft or no?
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Old 09-26-2010, 09:07 PM   #9
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Suppose we could get a comparison to a stock one for the rest of us? That would be great!
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Old 09-26-2010, 10:24 PM   #10
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Here is a pic of my sye.
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Old 10-09-2016, 08:00 PM   #11
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SYE kit? I bought this TJ and it had 2 inch transfer case lowering kit, but I took a closers look and it looks like I have a SYE kit? Maybe a Tom Woods? Please help, and sorry for the mess I had to take it wheeling LOL
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Old 10-16-2016, 08:37 AM   #12
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Basically if you have a harmonic balancer very near the Transfer Case you do not have the SYE kit installed. There is a longer gear shaft (tail piece) extending from the case that attaches to the driveshaft.
The SYE utilizes a shorter shaft that bolts (thru the center)to the cardon joint (CV) that in turn bolts up to the drive shaft.

Do a search for "Slip Yoke Eliminator" and you'll see many different setups.
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Old 01-24-2017, 03:22 PM   #13
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So why do you have a TC drop if you have a SYE?
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Old 05-09-2018, 01:38 PM   #14
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I'm wondering the same thing if you guys could tell me if I have a CV axle and Sye I would appreciate it I just bought a 4 inch lift kit and I would really rather not drop the transfer case
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Old 05-09-2018, 02:07 PM   #15
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I'm wondering the same thing if you guys could tell me if I have a CV axle and Sye I would appreciate it I just bought a 4 inch lift kit and I would really rather not drop the transfer case
You do not
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Old 05-09-2018, 03:39 PM   #16
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Do I at least have the CV axle?
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Old 05-09-2018, 05:52 PM   #17
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Do I at least have the CV axle?
No

This is a slip yoke eliminator and CV driveshaft
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Old 05-09-2018, 10:48 PM   #18
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The SYE is attached to the Transfer case and the Cardan joint attached to the drive shaft. Normally you wouldn't need at drop the transfer case with this setup (unless you go beyond 4.5" lift) I THINK.
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Old 11-05-2019, 04:49 PM   #19
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Could someone please tell me if i have an SYE on my jeep

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Old 11-05-2019, 05:33 PM   #20
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Old 11-05-2019, 07:37 PM   #21
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no you dont
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Old 11-08-2019, 04:55 PM   #22
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With a SYE the slip (how the drive shaft setup extends and compresses to allow for suspension movement) is in the drive shaft. The drive shaft with a SYE needs to have a section that can extend and contract. As mentioned, it is where the blue marking are in post #4.
Without a SYE, where you have a slip yoke, the drive shaft is solid and does not extend or contract. Instead, the yoke itself is capable of sliding into and out of the TC to allow for the suspension to move up and down (as the suspension moves up and down the differential gets closer to and further away from the TC). That section, the slip yoke, is where that black accordion section is. The black rubber accordion covers the slip yoke and keeps dirt and grime out.

The "CV" joint is just a double U joint. If you have one it is usually on the end by the TC.

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