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Old 05-13-2008, 12:57 PM   #1
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SYE/CV shaft alternative

Just wondering does anyone know there if a SYE/CV shaft alternative. I have a 99 Sport and just got my 4" FT short arm lift kit. I'm a little hesitant to put it in because I don't have a SYE kit yet and am afraid it will vibrate. It is a daily driver so if it does vibrate I don't want to be forced to buy a SYE kit before I can really afford it. It will only be used for light to moderate off -roading. Any iedas or opinions?

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Old 05-13-2008, 01:03 PM   #2
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You can buy a Transfer case Drop Kit (~$100). That will lower the t-case and reduce the angles.

I did a Rubicon Express 3.5" kit (which is more like 4.5" till things settle) the t-case drop kit came with the kit but I still had some minor vibes... I put some really wide washers betweeen the frame and the spacers and it minimized the issue.

Does your kit suggest it?

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Old 05-13-2008, 01:04 PM   #3
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Save your money and get the sye and driveshaft.Do the lift and sye at the same time.Then measure and get the shaft.Or some companies can get you real close on shaft length by telling them how much lift you have.
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Old 05-13-2008, 01:15 PM   #4
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A t-case drop is a very poor choice of solutions for a lift as tall as 4". Especially since once your suspension lift height gets to 4", the OE driveshaft also becomes too short to stay reliably engaged in some trail situations. Do it right and install a SYE and CV driveshaft.

P.S. For shorter lift heights, 1" t-case drop kits can be found all day for $30-$50. Even stacked washers with 1" longer Grade 5 t-case bolts are highly effective as a t-case drop and are even less $$$.
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Old 05-13-2008, 01:16 PM   #5
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install the lift.. and for the time being check out 4x4xplor.com

i followed his writeup and did a homemade tc drop until i can save enough money to finish my lift off and do a sye.. it cost about 9 bucks with all the bolts and washers.. and it works like a charm..

my gf runs a tc drop on her 4'' procomp lift and she has no vibes
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Old 05-13-2008, 01:19 PM   #6
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Quote:
Originally Posted by Jerry Bransford View Post
A t-case drop is a very poor choice of solutions for a lift as tall as 4". Especially since once your suspension lift height gets to 4", the OE driveshaft also becomes too short to stay reliably engaged in some trail situations. Do it right and install a SYE and CV driveshaft.

P.S. For shorter lift heights, 1" t-case drop kits can be found all day for $30-$50. Even stacked washers with 1" longer Grade 5 t-case bolts are highly effective as a t-case drop and are even less $$$.
wait.. ive always assumed a sye/new ds would be shorter than stock?

i know the d35 rear end driveshaft is about an inch longer than a d44 rear driveshaft..

if the problem is the stock shaft being too short.. when i do the swap will it actually help my driveshaft angle ?
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Old 05-13-2008, 01:27 PM   #7
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the point of the SYE is to get a slightly longer shaft in there (reducing the angle) .

the reason for the 35 shaft being longer than the 44 is the longer snout (pinion area) of the 44.
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Old 05-13-2008, 01:40 PM   #8
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Quote:
Originally Posted by whitebuffalo View Post
the point of the SYE is to get a slightly longer shaft in there (reducing the angle) .

the reason for the 35 shaft being longer than the 44 is the longer snout (pinion area) of the 44.
Exactly. Yes the SYE makes the t-case shorter but the reason for that is so you can install a longer driveshaft which as said, reduces the driveshaft's angle which stops the vibrations caused by the driveshaft's u-joints.
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Old 05-13-2008, 01:45 PM   #9
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so answer my question jerry =D

i got about 3.5'' of lift not including my bl.. the guy i ordered the axle from said i might need a sye when i install it.. yet ive talked to 3 people who did the swap and said they used the stock driveshaft..

if my ds is already longer since im swapping the axles out.. will it help my ds angle?

i plan on doing a sye.. but this wont be until after i either order a set of clayton sas or do the RE longarm upgrade
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Old 05-13-2008, 02:32 PM   #10
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your longer shaft isnt going to help you because where it mounts is still close to one another. IOW, you're not extending the mounting points of the shaft.
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Old 05-22-2008, 10:32 PM   #11
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I did the RE3.5, and had massive vibes. I installed the SYE/CV, and I still had vibes. After installing the Rear adjustable UCA's it runs as smooth or smoother than stock. Incredible difference. Changing the pinon angle with the UCA's really helped finish the lift. I would not do the lift without the option of doing the SYE/ CV and UCA's since you could leave yourself with a vibrating mess which could also destroy your transfer case.

Of course, I understand some have done the transfer case drop and also a MML. These can help.

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Old 05-23-2008, 09:38 AM   #12
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I had really bad vibes after my lift was installed(almost 5") had to install SYE and TW shaft and with adjustable upper CA's It has NO vibes what so ever. Like others have stated some go the drop t-case and mml route but I didn't like the idea of lowering my t-case. All in what you want I guess

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