Part #16-1201-1945 - $299.00 (w/1310 CV Yoke) Part #16-1201-1951 - $359.00 (w/1350 Non CV Yoke) Part #16-1201-1967 - $399.00 (w/1350 Rear Output Flange) NOTES. 3.125' SHORTER THAN OTHER HD SYE KITS ON THE MARKET. OVERALL LENGTH SHORTER THAN AN ATLAS II. PROVEN 32 SPLINE OUTPUT SHAFT. ALLOWS FOR MAXIMUM LENGTH IN THE REAR DRIVELINE. ELECTRONIC SPEEDOMETER FEATURE FOR ACCURATE SPEEDOMETER ADJUSTMENT.

• Np 231 Speed Sensor Clock Position
• Reviews

INCLUDES 1310 CV YOKE FEATURES Since 1994, our company has sold the 'HD Slip Yoke Eliminator' kit for all models of the NP231 transfer case. With many thousands of HD kits on the trail, we have had 100% success with not one failure. The target market of our original HD SYE kit was the Jeep YJ and TJ.

Mega Short Slip Yoke Eliminator Kit For NP231. Speed sensor tone ring onto the main shaft. 12 point bolts have been supplied to aid with the installation of the. Mega Short Slip Yoke Eliminator Kit For NP231. The installation of this kit requires you to nearly disassemble the. Speed sensor tone ring onto the main.

The typical Jeep suspension lift in past years was 3.5' to 4'. Suspension companies have now moved into the next level of design often call 'long-arm' kits. These new suspensions yield high travel and high lift. The HD SYE kit that was once more than adequate is now coming up a bit short.

For suspensions in excess of 4 inches, we have designed a new HD SYE kit that shortens the overall length of the NP231 by another 3-1/8' over the standard HD SYE. The longer shaft is a stock TJ shaft. The middle shaft is the current standard HD SYE shaft. The shortest shaft is found in the new SHORTY kit by JB Conversions, Inc. An added benefit of the new electrical design is in the flexibility of speedometer calibration. Signal converters from Dakota Digital, Inc. And Superlift Suspensions can be easily connected into the Jeep wiring loom (only 3 wires) for easy adjustability.

It is important to note that the signal converter is not necessary to have a functioning speedometer with our new kit. It is only necessary for adjustability necessitated by the changing of tires and/or ring and pinion gears. The speed sensor supplied in the kit produces the stock Jeep signal allowing the original speedometer to function normally.

Jeep Wranglers from 1987 to 1991 utilize a cable driven speedometer. For these applications we recommend the VDO electronic speedometer as a replacement. The VDO unit has its own adjustment features eliminating the need for the signal converter mentioned above.

The VDO unit is the same size as the stock speedometer and can be installed in the factory location behind the plastic dash panel. The illumination is a bit better than stock and the face matches stock very well. Installation is a snap with no wiring headaches. If you are in the market for a complete transfer case, please review our other web page featuring the with heavy duty internals and the HD shorty SYE. Why Superior Engineering Wins - Every Time Recently the JB Conversions, Inc. Super Short SYE has been compared to a new entry in the ultra-short SYE market. Various web postings and new product listings make reference to our product suggesting similarities in design and function to this other short SYE kit.

The following review provides information and comparative photos featuring our proven product. The Brand-X kit incorporates several design approaches which we feel are very inadequate.

Many of the attributes used by Brand-X to reduce overall length were considered and rejected by our company in the early stages of development of the JB kit. We want to make it very clear that these deficiencies draw absolutely no similarity to the superior design offered in the JB Conversions, Inc. Super Short SYE kit. The NP231 internal oil pump holds the key to a long lasting transfer case. Hidden Object. It is imperative that this oil pump be supported in a perpendicular position to the mainshaft. Our bearing housing follows the design of New Venture Gear in providing a distinct support 'shelf' or boss around the inside perimeter of the bearing housing.

Np 231 Speed Sensor Clock Position

This raised boss is intended to support the pump and hold it in proper position with the mainshaft. The four tabs on the oil pump are responsible for keeping the pump from rotating in the housing.

These tabs are very thin and are not intended to align or support the pump. This is the HONEYWELL speed sensor compared to the cheaper sensor used by the other brand. We could have used a cheap sensor like the one on the left however we didn't want to run the risk of creating problems with 'check engine' lights or speedometer issues. The HONEYWELL sensor cost is 4 times that of the 'all plastic' piece on the left. Notice the difference in the two speed sensors. A hidden benefit of our chosen sensor is that a replacement can be obtained from any Chrysler dealer anywhere at any time. Sensors do not hold up well to high heat therefore care must be given to the routing of aftermarket exhaust systems and catalytic converters.

Reviews

The tone wheel used in the JB shorty kit is machined from pre-hardened 4140 alloy and provides 8 oversize oil passages. The tone wheel works with the speed sensor to produce a speed signal and it also acts as a spacer below the output bearing. When the yoke nut is tightened, the shaft is drawn outward forcing the tone wheel to become compressed between a shoulder on the mainshaft and the bearing itself.

It is important that the tone wheel be made from a hardened material such that it is not deformed or dented when the nut torque is applied as is evident in the Brand-X tone wheel (see below). In the mid 1990's, New Venture Gear changed the mainshaft bearing design on most all of the 231 and 241 series transfer cases. This OEM design change eliminated the drive sprocket needle bearings located between the drive sprocket and mainshaft mid section. With the elimination of the needle bearings, the oil outlet port in the lower portion of the mainshaft was also eliminated. Eliminating the lower oil port increases oil pressure to the mainshaft oil port located directly underneath the drive sprocket where the needle bearings used to be located.

With the elimination of needle bearings, it is very beneficial to have the added oil pressure between the shaft and sprocket. Following the factory design, the JB mainshaft also eliminates the lower oil port hole. RETAINING RING.