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-   -   SYE/CV driveshaft install (http://www.wranglerforum.com/f210/sye-cv-driveshaft-install-241932.html)

turnbull 05-11-2013 12:05 PM

SYE/CV driveshaft install
 
I need to get a SYE and CV driveshaft but I have a couple of questions. First, I was looking at Rough Country driveshaft and SYE for a total of $500. However, when I took my Jeep to a shop, they said it would cost about $1300. Now, $800 for labor just seems ridiculous to me, but I just wanted some other opinions about it.

Is it easy enough to install that I could do it on my own? I thought I heard that you have to pull the TC and transmission to install it, is that true? Is $800 for labor too much to spend? I have a Jeep DIY manual, so I think I'd be able to figure out how to install everything, but I am just worried I don't have the proper equipment to pull the trans and TC.

My third option is to take it to a local transmission shop. Last time I went there, he replaced my TC and driveshaft. My rear U-joint went out which broke my CV shaft, SYE, and TC. The guy replaced it with a used TC and driveshaft in a stock configuration; for one, he didn't know you needed the SYE and CV shaft, and I didn't have the $$$ at the time for it anyway, I just needed it to be driveable. Anyway, he only charged me $300 for labor, so I assume it would be about the same to install a SYE and CV shaft if I went to the same guy.

So what should I do? Do I spend $1300 and get a warranty, spend $800 and not get a warranty, or spend $500 and do it myself?

Jerry Bransford 05-11-2013 12:33 PM

A SYE can be installed in a morning with no special tools other than a set of snap-ring pliers that open extra-wide. The instructions included with all of the SYE kits I have seen are good enough for most weekend-warrior type mechanics.

Also, entirely removing the t-case is NOT required to install a SYE kit. I did mine in my Jeep by only removing the rear half of the case. To me, doing it that way is a faster way to go. I suggest driving the rear wheels up on a pair of car ramps to give extra height which will make the job a little easier.

Take that $$$ you'll save & buy tools, car ramps, whatever & you'll be ahead of the game when you're done.

turnbull 05-11-2013 04:30 PM

OK thanks. I should have everything I need then, except maybe the pliers. But do you really think I would need the wheels on ramps? I have a 6" lift with 35" tires, and there's plenty of room under there to move around.

Jerry Bransford 05-11-2013 04:37 PM

The ramps aren't required, I just liked how I had more room underneath when I did mine like that.

One more thing you'll need... a pair of adjustable length upper-rear control arms so the rear pinion angle can be raised to be the same as the new CV driveshaft which is 100% required. :)

turnbull 05-11-2013 07:44 PM

1 Attachment(s)
Wait you mean the rear pinion angle should be parallel to the driveshaft right? If that is the case, then it should be good to go. Like I said, it used to have the SYE and CV shaft on it before it broke, and the pinion angle hasn't changed since then; it is still parallel to the shaft.

This is what my rear axle looks like right now. The only difference is that I have a stock shaft, not a CV shaft like in the picutre.

Jerry Bransford 05-11-2013 07:55 PM

1 Attachment(s)
Quote:

Originally Posted by turnbull (Post 3745284)
Wait you mean the rear pinion angle should be parallel to the driveshaft right? If that is the case, then it should be good to go. Like I said, it used to have the SYE and CV shaft on it before it broke, and the pinion angle hasn't changed since then; it is still parallel to the shaft.

This is what my rear axle looks like right now. The only difference is that I have a stock shaft, not a CV shaft like in the picutre.

No, the pinion angle should only be the same as the driveshaft when an aftermarket CV driveshaft is installed.

For the factory driveshaft with one u-joint at each end, the pinion angle absolutely must be parallel to the transfer case output shaft, NOT the driveshaft.

Yours should look like this.

turnbull 05-11-2013 08:09 PM

Yea but what I am saying is that the pinion angle is parallel to the driveshaft because it used to have a SYE and CV shaft; but I broke SYE, shaft, and TC. The guy who repaired it for me just replaced the TC and put a stock shaft back in. So what I am saying is, since my pinion angle is already parallel to the driveshaft, I shouldnt have to change that when I install the SYE and CV shaft correct?

climbit 05-11-2013 08:10 PM

Quote:

Originally Posted by turnbull (Post 3745366)
Yea but what I am saying is that the pinion angle is parallel to the driveshaft because it used to have a SYE and CV shaft; but I broke SYE, shaft, and TC. The guy who repaired it for me just replaced the TC and put a stock shaft back in. So what I am saying is, since my pinion angle is already parallel to the driveshaft, I shouldnt have to change that when I install the SYE and CV shaft correct?

Correct. Your pinion angle is already set.

Jerry Bransford 05-11-2013 08:13 PM

Quote:

Originally Posted by turnbull (Post 3745366)
Yea but what I am saying is that the pinion angle is parallel to the driveshaft because it used to have a SYE and CV shaft; but I broke SYE, shaft, and TC. The guy who repaired it for me just replaced the TC and put a stock shaft back in. So what I am saying is, since my pinion angle is already parallel to the driveshaft, I shouldnt have to change that when I install the SYE and CV shaft correct?

That is correct, I misunderstood you. I thought you were talking about for your existing factory driveshaft.

turnbull 05-11-2013 08:18 PM

Yeah I went back and looked at my previous post and I definitely see why that was confusing. I'm gunna try to get this done ASAP cus I have no idea how long my shaft is gunna last in its current configuration.

Bulldogranger 06-01-2013 06:14 PM

I have a question then, and this is good information from you folks btw, is the front pinion angle done the same way because of the cv front drive shaft?

Big Cole 06-01-2013 06:23 PM

Quote:

Originally Posted by Bulldogranger (Post 3815268)
I have a question then, and this is good information from you folks btw, is the front pinion angle done the same way because of the cv front drive shaft?

Front pinion angle doesn't matter. I wouldn't even worry about making any adjustments

Jerry Bransford 06-01-2013 07:19 PM

The front pinion angle does matter and it takes precedence over the front axle's caster angle. And the front pinion angle does need to be the same as the front driveshaft angle due to it having a CV joint.

That said, the front pinion angle does not normally need to be adjusted when installing a new suspension lift. It usually only needs to be adjusted if the pinion angle is being set up after having installed new adjustable length control arms.

Water Dog 06-01-2013 08:44 PM

Here's a couple of good links for SYE installations.
JB Super Short SYE Installation - 1
Advance Adapters Slip Yoke Eliminator AA SYE Jeep TJ Installation


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