Ultra-Short NP / NVG 231
Slip Yoke Eliminator Assembly

One of the best innovations available for your Jeep 231 transfer case is the Extreme Slip Yoke Eliminator kit. Designed for the most rigorous duty Jeeps, it replaces the problematic OEM tailhousing and mainshaft with a fixed yoke design, and creates an optimally short New Process (or New Venture) 231 transfer case.

Kit, slip yoke eliminator, Jeep NP231, extra short version Part #: 231XS Weight: 16.00 Price: $309.00 Buy: Mainshaft, tailhousing, yoke, speed sensor, reluctor ring, snap ring, bearing, seal, fasteners & instructions

The shaft is machined from gear steel alloy and the housing is cast of aircraft grade 356-T6 aluminum. It uses a stable bearing-on-yoke design to make for the most vibration and wear resistant assembly available.

It is common for suspension-lifted Jeeps with OEM style transfer cases to experience driveshaft vibrations due to excessive u-joint angles.

The short shaft kit will shorten the NV231 by 7" over factory setups, 3" more than standard SYE kits, and will even yield a total transfer case package that is 1.5" shorter than the Atlas transfer case.

The robust 32 spline output shaft features full practical spine engagement with its yoke (i.e., the spline shear limit of the yoke is equal to or greater than the twist limit of the shaft).

The large 1310 CV series rear yoke is forged from alloy steel.

The kit comes with all items as shown in the image. Driveshafts are not included due to the myriad of different lengths and combinations available. We recommend the services of a good local or national driveshaft specialist to assist you here.

We are pleased to have collaborated with TeraFlex in the development of this new generation of NVG 231 heavy-duty mainshaft assemby. We've installed them on our own Jeeps and have enjoyed hearing so much positive feedback from our customers upgrading their own 231 transfer cases. With a well-planned design and premium materials, we expect that it will outlast the most severe duty of situations.

 

 

The double walled retaining ring features a shear rating of 26,930 lbs. and the groove yield is 12,300 lbs. The large 209 Series bearing is rated at 7,900 ft. lbs of dynamic load. The conical housing is cast of a significantly thicker 356-T6 wall material than the 231 case itself for absolute durability. The electronic speed sensor is compatible with 1992 and later Jeep electronic speedometers. Speedometer readings are transferred through a tone ring and electronic sensor. Ring & pinion ratio/tire size can be custom calibrated by any OEM service center to match custom ring & pinion/tire size modifications. Note: Earlier 231 applications with mechanical speedometer cable require updating to one many common aftermarket electronic speedometers, that can be calibrated to your tire size and axle ratio.

 

 

The short shaft kit will shorten the NV231 by 7" over factory setups. The middle kit is the Standard Short Shaft kit, for installers that don't require the longest possible rear driveshaft. It's mechanical speed output signal makes it ideal for 1991 and earlier Jeeps with a mechanical speedometer.