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Alloy USA NP231 Slip Yoke Eliminator Kit (87-06 Jeep Wrangler TJ & YJ)

Item J14911
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Market Price $328.89 You Save 13% ($42.90)
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$285.99 (kit)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Slip Yoke Eliminator Kit
      • Steel, Aluminum, Miscellaneous Materials
      • High Quality, Durable Construction
      • Natural Finish
      • For Jeeps with a 2 Inch or More Suspension Lift
      • Works with the NP231 Transfer Case (All Variants)
      • Reduces Driveshaft Angle to Cut Vibrations and Improve U-Joint Life
      • Short Main Shaft is Tough and Rugged
      • Features Improved Oiling
      • 1.1 Pounds
      • Output Shaft, Speedometer Ring, 3 Snap Rings, Output Yoke with Nut, Front Output Seal, Rear Output Seal, Upgraded Rear Output Case
      • Hardware Included
      • 5 Year Limited Warranty
      • Fits 1987-2006 Wrangler YJ and TJ Models with the NP231 Transfer Case


      Specs. If you're sick of steering wheel shake or vibrations, broken U-joints, and other problems after installing 2 inches or more suspension lift in your Wrangler, this Slip Yoke Eliminator Kit for the NP231 Transfer Case, made by Alloy USA, fits the bill for correcting these problems. It replaces the slip yoke with a fixed yoke. This smooths out or eliminates vibration and shaking, boosts U-joint and bearing longevity, and gets rid of the need to drop your transfer case.

      Construction. The Slip Yoke Eliminator Kit, NP231 Transfer Case by Alloy USA is made from strong, lasting materials and comes with a 5 year limited warranty. It functions with Jeeps that have a minimum 2 inch suspension lift. It does not work with either Rubicon models or Wranglers fitted with cable speedometers. The kit includes an output shaft, a speedometer ring, 3 snap rings, an output yoke with nut, a front output seal, a rear output seal, and an upgraded rear output case. The main shaft is shortened, the driveshaft angle is reduced, and oiling is made easier and more effective.

      Application. Fits 1987-2006 Wrangler YJ and TJ models

      Fitment: 1987 1988 1989 1990 1991 1992 1993 1994 1995 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Details

      MPN# 11400

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (5)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 5 customers

      • September 10, 2018

        5 2000 Wrangler - TonyaB

        Slip yoke eliminator

        Had to have it professionally installed. But afterwards, the shake was gone and the ride felt so much better. Definitely recommend professional install. Worth the money even though I didn't want to spend it

        Helpful (12)
      • May 28, 2018

        4 2003 Wrangler - Hunter


        Helps a little with the vibration from lifting my T-J 4’’.

        Helpful (14)
      • August 22, 2017

        5 2004 Wrangler - RussellE

        Works well and does the job.

        This was recommended by my mechanic that installed my 3.25 inch RC lift. I've heard you may be able to get away without one of your 3 inches or a little over on your lift, but for the longevity of the vehicle and not having to constantly replace parts underneath due to the increased angle this is highly recommended. The mechanic that installed the lift said this was fairly straightforward, but did take a little time to install. Glad I went ahead and rounded out my lift the right way by adding this part.

        Helpful (17)
      • March 23, 2015

        5 2005 - RC39

        Great product

        This product came with everything needed, and listed in the description. It was easy to install, with no surprises. I would recommend it to anyone with vibration problems due to 2 inch lift or more. I wish I had done this first, instead of wasting my time and money on other fixes. My lift was a 2.5 inch. I would recommend this product to anyone.

        Helpful (15)
      • January 22, 2014

        5 1997 - Turbostixxx


        This product was installed fairly easy. Took a little Mechanical know how to remove the tcase and install the SYE after cracking the case. Only thing I can say is, MAKE SURE YOU HAVE A BIG PAIR OF SNAP RING PLIERS! It will make your life soooo much easier when removing the stock tailhousing.

        Helpful (18)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      Will this work with a stock drive shaft on a 94 Sahara, if not what length would I need? Or part number.

      What is the yoke for the alloy usa slip yoke eliminator kit 87-06?

      • Thank you for your question. Unfortunately we are not sure what you are asking! I would suggest reaching out to us over the phone so we can better assist you. Our contact information can be found here:

      Helpful (0)

      Will the Alloy USA slip Yoke Kit #J14911 Fit with the Rear drive shaft #J11721 for my 2001 Sahara?

      • The Alloy USA Slip Yoke Eliminator Kit, NP231 Transfer Case (87-06 Wrangler TJ & YJ) and OMIX-ADA CV REAR DRIVESHAFT W/ 2 TO 6 IN. LIFT (97-06 WRANGLER TJ) should be able to be combined.

      Helpful (0)
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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Rear Output Housing
      • (1) Rear Output Seal
      • (1) Main Output Shaft
      • (2) Snap Ring for Speedometer Gear
      • (1) Snap Ring for Mode Gear
      • (1) Rear Output Spline Seal
      • (1) Rear Output Bearing
      • (1) Rear Output Yoke
      • (1) Yoke Nut
      • (1) Speedometer Drive Gear
      • (1) Rear Output Bearing Snap Ring
      • (1) Front Output Spline Seal

      Will It Fit My Wrangler

      • TJ Rubicon 2 Door - 03, 04, 05, 06
      • TJ Rubicon Unlimited 2 Door - 05, 06
      • TJ Wrangler 2 Door - 97, 98, 99, 00, 01, 02, 03, 04, 05, 06
      • TJ Wrangler Unlimited 2 Door - 04, 05, 06
      • YJ Wrangler 2 Door - 87, 88, 89, 90, 91, 92, 93, 94, 95

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