Rear Driveshaft - JeepForum.com

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post #1 of 25 Old 12-31-2011, 06:05 AM Thread Starter
Almost a jeep
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Rear Driveshaft

I have a 3 inch lift and an 8.8 with no SYE. I know that the SYE is what I need for sure but like a lot of others, short on funds for now by the time I purchase the SYE and driveshaft. Still running the stock driveshaft with slip yoke and I pretty much have no vibes, amazingly. The problem is, the slip yoke is pulled out of the transfer case at least an inch or inch and a half further than it was with the stock 35. So, with the lift and the 8.8, I think the slip yoke is pretty close to coming all the way out if the rear end is at full drop. I did let it hang and it stayed in but it has to be close. So, custom made driveshaft a little longer? Someother type of driveshaft (double ujoints, etc)? Is there a stock shaft that can be cut down from another vehicle?Sorry, not real versed in driveshaft types and names. As always, thanks for any advice.


94 Wrangler SE, 4.0, Auto, SYE, Hard top, 31X10.5X15, 3" Skyjacker, 8.8 w/ disc brakes. 06 Grand Cherokee stock.
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post #2 of 25 Old 12-31-2011, 07:35 AM
scubamc
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Just try not to get in a situation where you might pull the driveshaft out until you can get the SYE and new driveshaft. No sense in spending a little money now to make do just to spend it again months later.

Horsepower is like a hot girl with STDs. You know you want to hit it but you're afraid of the consequences.
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post #3 of 25 Old 12-31-2011, 07:39 AM
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you can get driveshafts lengthened. They basically cut your yokes out and use a longer piece of driveshaft stock. I'm going to repeat what scubamc said, NOT worth it. keep it in your pants for a few paychecks

93YJ 350-465-205, D60 and 14 Bolt, 40's http://www.jeepforum.com/forum/f22/yj-rustoration-1327569/
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post #4 of 25 Old 01-01-2012, 07:57 AM Thread Starter
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Agreed. Smart money is to wait and be careful but it's one of those things that's always in the back of your mind everytime I wheel. Who knows how long until the SYE is going to be an option, but thanks.

94 Wrangler SE, 4.0, Auto, SYE, Hard top, 31X10.5X15, 3" Skyjacker, 8.8 w/ disc brakes. 06 Grand Cherokee stock.
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post #5 of 25 Old 01-01-2012, 08:52 AM
dodger889
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Well let's see about 200 for sye and 40-50 for a xj front drive shaft at a junk yard. the about 125-150 to get it resized and balanced your are at 400 total for the right driveshaft and sye. Now if you really want to save money get under there and do all the work it's not that much.

A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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post #6 of 25 Old 01-01-2012, 09:25 AM
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Quote:
Originally Posted by dodger889 View Post
Well let's see about 200 for sye and 20 for a xj front drive shaft at a junk yard. the about 90 to get it resized and balanced your are at 310 total for the right driveshaft and sye. Now if you really want to save money get under there and do all the work it's not that much.
Fixed some of it for ya because if the OP was that interested in saving money, he would be able to source things out at the corrected prices or maybe cheaper.

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post #7 of 25 Old 01-01-2012, 09:41 AM
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I totally understand about money being short but if it is close to coming out at full droop, there is a good chance of it binding or snapping the slip yoke which in turn can break the tail housing among other things. That can be even more expensive in the long run.
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post #8 of 25 Old 01-01-2012, 09:49 AM
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If it were me, I would either get the driveshaft lengthened now or remove it, seal the tailhousing with something to prevent leaking and drive with the front shaft only while saving for a SYE.
I would be afraid of breaking other stuff driving it as is.
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post #9 of 25 Old 01-01-2012, 10:06 AM
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Another problem to watch for is breaking the U-joint straps. With your current setup, you can easily bind the shaft on the slip-joint and put undue stress on the rear U-joint. This will stretch the strap and cause the U-joint to come off the yoke shortly.

As mentioned, just *****-foot it till you can fix it correctly.

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post #10 of 25 Old 01-01-2012, 10:09 AM
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which perches did you use on the 8.8? some have extra holes and you can move the axle forward 1"
or, drill a couple of new holes.

Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.

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post #11 of 25 Old 01-02-2012, 07:31 AM Thread Starter
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Quote:
Originally Posted by roadyrob View Post
which perches did you use on the 8.8? some have extra holes and you can move the axle forward 1"
or, drill a couple of new holes.
I cut and reused the perches off of my 35, never thought of trying to move the axle forward. However, as mentioned above, the price for the SYE and driveshaft isn't as bad as I would have guessed. I have never paid anyone to work on my Jeep and don't want to, I have just never gotten into a TC before, kind of scary. I think I just need to bite the bullet and stop trying to "FRUGAL" and take short cuts. Frugal is what I call myself, but my wife calls me cheap.
For those who have done the SLE, is it really doable for someone who has never gotten into a case before? I've rebuilt a couple of SBC's when I was a kid, worked on old farm tractors, used to work in a semi-tractor fleet shop and feel pretty confident in my mechanical abilities, just never taken a case apart before.

94 Wrangler SE, 4.0, Auto, SYE, Hard top, 31X10.5X15, 3" Skyjacker, 8.8 w/ disc brakes. 06 Grand Cherokee stock.
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post #12 of 25 Old 01-02-2012, 07:57 AM
roadyrob
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advance adapters has a video on you tube showing the sye install, check it out, the guy makes it look easy

Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.

the voices aren't real but they sure have good ideas.
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post #13 of 25 Old 01-02-2012, 07:58 AM
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Quote:
Originally Posted by Almost a jeep

I cut and reused the perches off of my 35, never thought of trying to move the axle forward. However, as mentioned above, the price for the SYE and driveshaft isn't as bad as I would have guessed. I have never paid anyone to work on my Jeep and don't want to, I have just never gotten into a TC before, kind of scary. I think I just need to bite the bullet and stop trying to "FRUGAL" and take short cuts. Frugal is what I call myself, but my wife calls me cheap.
For those who have done the SLE, is it really doable for someone who has never gotten into a case before? I've rebuilt a couple of SBC's when I was a kid, worked on old farm tractors, used to work in a semi-tractor fleet shop and feel pretty confident in my mechanical abilities, just never taken a case apart before.
Yes, its not hard. You don't get into the front gear section at all. In essence you are just pulling off the back case half, pulling the output shafts, swapping a couple pieces from the stock output to the new and then putting it all back together.

The only "specialty" tool needed is snap ring pliers.

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post #14 of 25 Old 01-02-2012, 08:07 AM
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Installing a SYE is one of the simplest things you can do on your jeep. No kidding! If you buy a good quality kit too they come with very easy to understand instructions. Trust me when your done you will say wow that was easy. Now I recomend removing it from the jeep and doing it on a bench its hard to torque the yokes while still in the jeep. Just my .02

build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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post #15 of 25 Old 01-02-2012, 10:43 AM Thread Starter
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I've been watching videos and everyone is right, they make it look pretty simple, but it always does on someone else's video. I'm sure everyone has their own opinions but is there a reason to go with one certain kit over another brand? Ebay has a couple that are pretty inexpensive.

94 Wrangler SE, 4.0, Auto, SYE, Hard top, 31X10.5X15, 3" Skyjacker, 8.8 w/ disc brakes. 06 Grand Cherokee stock.
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