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TeraFlex SYE Kit TJ XJ YJ LJ with 231J Transfer Case

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16.00 LBS
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Product Description



TeraFlex Slip Yoke Eliminator (SYE) Kit for TJ - XJ - YJ - LJ With 231J Transfer Case.

Note: Fits 231-J transfer cases only.


SKU: 4444401


The TeraFlex TJ / YJ / XJ  and LJ: NP231 Short Shaft Kit increases the rear driveshaft length by 4” eliminating the need for a Transfer Case Lowering Kit in most cases. This Kit help make the Driveshaft angle better to help eliminate angle, and vibration issues. Also includes a larger/stronger output shaft, bearing and rear housing. [Will need to buy a 1310 cv driveshaft in order for this kit to work. We also sell this as a Package that would save you money if you don't already have a  1310 cv driveshaft.


• TJ Wrangler (short wheelbase)

• LJ Wrangler Unlimited (long wheelbase)

• YJ Wrangler

• XJ Cherokee  Note: If the XJ Cherokee has a Vacume Disconnect then this is not the right kit. You would need a Tera Flex NP231 Short Shaft Kit w/ Vacuum Disconnect (SKU# 4444402)



• Output housing

• Transfer case rear output shaft

• Output Housing Seal (# 231104)

• Output housing bearing

• Rear Output Yoke (# 3244404)

• Output Yoke Flanged Nut (# 231112)

• All necessary hardware


• This kit must be used w/ a CV style (double cardan) driveshaft.

• Fits NP231-J transfer cases only.

Install Time: 5 hours

Related Parts:

• TJ / YJ / XJ: NP231 Short Shaft Kit (# 4444401)

• XJ Cherokee: NP231 Short Shaft Kit w/ Vacuum Disconnect (# 4444402)

NP231 Short Shaft Kit


CA Residents:  WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov


Install Instructions Link: https://teraflex.com/file/attachments/55bc0c975767d57b790029db.pdf

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Product Reviews

  1. As advertised 5 Star Review

    Posted by on 13th Oct 2020

    Went together very easy. Instructions were very easy to follow.