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Slip Yoke Elimination Kits

Posted: Thu Feb 05, 2015 11:08 pm
by Lud
Almost every major aftermarket manufacturer makes one for the np231 on my Jeep. So I have a few questions before I go through the next round of upgrades on the jeep.

1) Which companies make the best kits? Are there any I should stay away from.

2) Should I go with a standard SYE or a super short SYE? I'm adding a flat skid under the jeep and rear adjustable arms for the pinion angle as well.

3) Driveshafts. Go with a Shiny new one or get as front driveshaft and have it hacked up?

Posted: Fri Feb 06, 2015 2:24 am
by TJDave
I installed a PORC SYE on the recommendation from Roman.
It was inexpensive and works great.
But, if I had to do it all over again I would get the SS SYE.
With our short Jeeps and only 3" of lift, my driveline angle is very steep after the Tummy tuck.

Posted: Fri Feb 06, 2015 5:23 am
by scumby
i had the SS JB conversions that TJD speaks of on a previous jeep and had zero issues.

Posted: Fri Feb 06, 2015 7:56 am
by Wrench
I say if you are going to do it, go super short. The total cost is not much more, and the Wrangler platform is better off using the longest shaft possible. I have never heard of any "quality" problems with any kits at all.

As for drivelines, they really are easy to lengthen or shorten. If you can score a good driveline for cheap that just needs the length adjusted, I would go that route. It is actually a lot quicker to get the exact length you need if you weld it together installed, no measuring required.

Posted: Fri Feb 06, 2015 8:38 am
by Wrongway
Mfg #: 18676.72 NP231 Mega Short Slip Yoke Eliminator (Sye) Kit With Speed Sensor By Rugged Ridge.

$350 plus shipping. Let me know if you're interested I will check stock.

Image

Posted: Fri Feb 06, 2015 10:08 am
by Lud
One more question.

What do I need to do to recalibrate the speedometer after a short sye conversion? My 231 case currently has a gear driven speedo. It looks like all the kits covert it to a magnetic pickup that sends an electrical signal out similar to the stock Rubicon t-case.

Posted: Fri Feb 06, 2015 10:34 am
by Wrongway
Dakota Digital $80 or have the dealership flash the ECM. $100

Posted: Fri Feb 06, 2015 11:57 am
by Roman
Lud wrote: My 231 case currently has a gear driven speedo. It looks like all the kits covert it to a magnetic pickup that sends an electrical signal out similar to the stock Rubicon t-case.


You currently have a gear driven electronic sender, not speedo. Thats why there is a sensor plug attached to the t-case, not a speedo cable.

Posted: Fri Feb 06, 2015 12:24 pm
by Lud
Yes you're right that's what I meant.

Posted: Fri Feb 06, 2015 1:25 pm
by mattawajeep
I have the Teraflex Extreme Short kit in my TJ. It was the best deal pricewise at the time.

Hasn't given me any problems so far. I'm also using the Dakota Digital adapter Wrongway mentioned. It's the cheapest and best option, as you can calibrate it yourself whenever you want. It's also been working smoothly since I installed it.

Posted: Fri Feb 06, 2015 1:52 pm
by Wrongway
Teraflex kit is cheaper to buy at teraflex.biz

4444400 is the kit#... $259.99. My cost is above that.

Posted: Fri Feb 06, 2015 2:52 pm
by Lud
It's a little more than the Dakota but this one is plug and play for TJs.

http://www.bluemonkeymotorsports.com/products_ht.html

Actually from doing a little research, it's looks like ill have to drive it and see how far the speedometer is off. It looks like the 4.56 gears and 35s May be within 2% of actual speed which I can live with.

Posted: Fri Feb 06, 2015 4:12 pm
by mattawajeep
Lud wrote:It's a little more than the Dakota but this one is plug and play for TJs.

http://www.bluemonkeymotorsports.com/products_ht.html

Actually from doing a little research, it's looks like ill have to drive it and see how far the speedometer is off. It looks like the 4.56 gears and 35s May be within 2% of actual speed which I can live with.


Yikes, double the price just for a little plug! :lol:

I suppose if you're in a big hurry and don't want to add a couple wires it could be worth it.... The Dakota digital unit was really easy to set up, you can just leave the factory plugs and wires where they are. All you really need to do is get power to the unit, then put it inline with the stock sensor wire.

I'd also question accuracy if you go with a preset setting, it'll certainly be off more than 2% unless your tire is exactly 35" high (they vary too much). You'll probably end up doing the exact same calibration procedure as the Dakota if you care about getting the speedo accurate.

Posted: Fri Feb 06, 2015 4:45 pm
by Lud
I'll go with the Dakota for sure if I need it. I just like to look at all the options out there.

Posted: Fri Feb 06, 2015 5:48 pm
by Jafo
You can replace the blue gear that is on the output shaft when you do the sye, you just have to figure out the tooth count verses tire size and gear ratio. They make a aftermarket one to correct the speedo. I believe I went with advanced adapters when I did mine I think.

Posted: Fri Feb 06, 2015 5:53 pm
by Jafo
I guess it is the gear on the plug that you change, here is a reference chart to order the correct tooth gear.
http://www.quadratec.com/jeep_knowledge ... cle-46.htm

Posted: Fri Feb 06, 2015 6:08 pm
by mattawajeep
Jafo wrote:You can replace the blue gear that is on the output shaft when you do the sye, you just have to figure out the tooth count verses tire size and gear ratio. They make a aftermarket one to correct the speedo. I believe I went with advanced adapters when I did mine I think.


Not with the short sye's, there's no gear at all. It's a tone ring and sensor setup.

Posted: Fri Feb 06, 2015 6:08 pm
by Lud
I've already done this with my current setup. I have a dead on speedometer now. When I switch to a super short sye, I will lose the gear driven sender.

Posted: Fri Feb 06, 2015 7:36 pm
by Jafo
mattawajeep wrote:
Not with the short sye's, there's no gear at all. It's a tone ring and sensor setup.


Whoops, forgot the question was about the ss sye..... :oops: