Advance Adapters Drive Shaft Angle Reduction Kit (Slip Yoke Eliminator) Reviews, Ratings, Specs & Prices
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Advance Adapters Drive Shaft Angle Reduction Kit (Slip Yoke Eliminator)

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Product Information

MSRP: $57,567.00
Average Price: $835.87
Manufacturer: Advance Adapters
Yes: 111 / No: 0

Reduce driveline vibration on lifted vehicles with this Heavy Duty Slip-Yoke Eliminator Kit for Jeep's NP231J transfer case. Transfer case tailshaft length is reduced by 6.5" on '97-'01 Wranglers and 4.25" on '88-'95 models resulting in improved driveline angles. Kit includes a redesigned transfer case mainshaft which is not only shorter but has an 18% larger spline diameter, a 54% increase in torque capacity.


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Registered User
KyBoy1991's Reviews
07-01-2011, 12:57 PM
Price: $320.00
Pros: SYE & rebuilt shaft all came from Carolina Driveline. These guys are top notch with high quality products for very cheap!!! Save some time and go there first!
Cons: directions were ok....could have been written for a more novice guy and I think about anyone could do the job.
Recommended? Yes

Comments: I bought my kit from Carolina Driveline. Kit included the Advance Adapters NP231 SYE Kit and rebuilt custom length high speed balanced drive shaft.

Very complete, high quality high grade parts. The directions and pictures could be a bit better in clarity. All black and white makes it tough there, but very good stuff none the less.

Registered User
smoghog4's Reviews
01-20-2011, 09:18 PM
Price: $200.00
Pros: good instructions
Cons: wasnt free
Recommended? Yes

Comments: Pretty Smooth Installation. No problems as of yet. would reccomend

Registered User
BlakJeep's Reviews
01-02-2011, 04:57 PM
Price: $200.00
Pros: This is IMO a must for any NP231J
Cons: none
Recommended? Yes

Comments: 32 spline output shaft is much better than stock, this is a must IMO. You don't have to buy Advanced Adapters but just get one for piece of mind.

Registered User
Kinless's Reviews
11-17-2010, 11:07 PM
Price: $1.00
Recommended? Yes



Registered User
smokinlib1's Reviews
10-25-2010, 02:03 AM
Price: $199.99
Pros: Easy install
Cons: None
Recommended? Yes

Comments: Works great

Registered User
jeepsus's Reviews
09-13-2010, 04:39 PM
Price: $199.00
Pros: eliminated vibrations
Cons: hard to find rear seal
Recommended? Yes

Comments: i bought mine used and am having trouble finding a rear seal for it. other than that i am more than please. it was easy to install without instructions i might add and it adds a bit of strength to the rear output shaft.


Registered User
chupacabrah's Reviews

09-12-2010, 10:52 PM
Price: $200.00
Pros: great
Cons: none
Recommended? Yes

Comments: not bad to install, really just had to take my time installing it. had it for a few years now. great to have.

Registered User
cbossio's Reviews
08-09-2010, 11:56 AM
Price: $200.00
Pros: Cheap, Straight forward instructions, Decent write-ups on the net.
Cons: Made in Taiwan, Vietnam, or one of those other countries that are not America.
Recommended? Yes

Comments: Save yourself some time and buy a stubby ratcheting 14 millimeter wrench (pretty sure it was a 14. verify with write-ups before you buy) to remove the very top bolt holding the t-case to the trans. You can make this swap by either removing the t-case or leaving it installed. I found it much easier to remove the case. It's much easier to reassemble while out. Especially if you are unfamiliar with the inner workings of the t-case. While you are doing this swap, you might as well change the speed-o gear. You have to remove it anyways and it's probably worth the $1.99 to correct your speedometer.


Registered User
RaggedOleMan's Reviews
08-05-2010, 10:34 AM
Price: $250.00
Pros: Never given me a problem
Cons: none
Recommended? Yes

Comments: I used the kit in conjunction with Rubicon Express RUCA's to minimize D/L vibes. I still have some vibes at 0-10mph that we never could get rid of.

Registered User
slpv09's Reviews
07-29-2010, 01:01 PM
Price: $225.00
Pros: reduces vibration, driveshaft wont fall out
Cons: none
Recommended? Yes

Comments: good product good price

Registered User
failure2stop's Reviews
05-21-2010, 12:46 AM
Price: $340.00
Pros: does the job
Cons: none yet
Recommended? Yes

Comments: INstalled it and noting bad as of yet. it is doing it's job.

Registered User
Hailchief's Reviews
03-03-2010, 08:59 AM
Price: $175.00
Pros: Easy to install
Cons: None
Recommended? Yes

Comments: Very good and very easy to install. Make sure you get yourself a good pair of lock ring pliers. You will need them


Registered User
davidkaiser05's Reviews
02-28-2010, 04:19 PM
Price: $250.00
Pros: Easy to install.
Cons: None
Recommended? Yes

Comments: Just finished installing it and it was a breeze. It only took about two hour maybe three with the driveshaft.


Registered User
SolidBrass's Reviews
02-28-2010, 01:49 AM
Price: $500.00
Pros: you know
Cons: none
Recommended? Yes

Comments: I don't know what brand my SYE is but is required for 4" lifts. If you don't your are NOT KEWL!


Soar Forever Six
jeepinmichguy_'s Reviews
01-15-2010, 10:26 AM
Price: $250.00
Pros: its a sye
Cons: none
Recommended? Yes

Comments: I have had this on for 7 years, 2 transfercases and no issues. I would highly recommend when looking for a SYE.


Registered User
OCsurfin's Reviews
01-12-2010, 07:32 PM
Price: $666.00
Pros: eliminates need for t-case drop
Cons: housing casting was off
Recommended? Yes

Comments: great product once you get past the vague instructions and troubleshoot the odd problem i had. the casting they used on the housing must have been off, when i finished the installation and went to test it out the shift rod was bottoming out on the rod channel in the housing, i wobbled it out with a drill bit and everything is kosher.


Registered User
gecko5's Reviews
01-03-2010, 10:24 PM
Price: $250.00
Pros: Reduced Driveline bind
Cons: Bought Used. One of the bushings were toast
Recommended? Yes

Comments: Great setup and a must to have if you are lifting over 3"'s or are doing any other kind of changes to the driveline.

Douglas S.

Registered User
Douglas S.'s Reviews
12-27-2009, 12:24 AM
Price: $200.00
Pros: Easy intall, high quality
Cons: Snap rings without holes
Recommended? Yes

Comments: Was needed when I installed my lift and was very easy to install (other than none of the snap rings had holes for the pliers- made things a little difficult). Took about four hours total (first time). Nothing more to say really.

Registered User
YJNot's Reviews
12-22-2009, 07:59 PM
Price: $499.00
Pros: Great instructions, except to the speedo indexing. INCLUDED A TOM WOODS CV DRIVESHAFT!!!!!
Cons: Should cover the pinion angle in more detail and maybe shims?
Recommended? Yes

Comments: The installation was real easy. There are no vague instructions. The hardest part was pressing out the two caged needle bearings if you have them. My Cheapese press couldn't do it, so a freind did.

The driveshaft included price was pretty good, saved some buck there.

Registered User
Boodyrider's Reviews
11-01-2009, 01:09 AM
Price: $100.00
Pros: got a great deal, works great
Cons: Not as short as JB Conversions ultra short
Recommended? Yes

Comments: I like this SYE. It's solid, got a great deal when I bought it used already installed, and it works. Now that I've done a bellyup and about to do a lift, I would go with a shorter SYE (the JB Conversions ulta short one) if I were to do it again, as my DS angles are getting a little silly, and I'd like a longer rear DS. But it's a good option for many.

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