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How to Install Teraflex Yoke U-bolt Conversions-complete yoke kit on your Wrangler

Installation Time

2 hours

Tools Required
  • 5/16 – 12 point box wrench or shallow socket
  • 1-1/8 inch socket
  • 1-1/4 inch socket
  • 1-5/16 inch socket

NOTES: Make sure that you align the balancing marks on the yoke and drive shaft at both the axle and the transfercase.

Be very careful to install the correct yoke. Do not mix up the front and rear axle yokes or you will damage the pinion seals, resulting in an oil leak.
• Front pinion yoke is Part #949200
• Rear axle pinion yoke is Part #949300
• Both transfer case yokes use Part #949100
• Before you begin the installation order Jeep part number 5143738AA (1 nut per driveshaft) if you want to install a new yoke nut with each transfer case yoke.
• Driveline Angle: Point rear pinion toward transfer case not parallel to the output shaft.
• Control Arms: Rear adjustable control arms are required to adjust the pinion angle for the Rear Driveshaft.

INSTRUCTIONS:

1. Lift the Jeep and support it on jack stands or a hoist so all 4 wheels are free to rotate. This will make it easier to remove the factory bolts on the driveshaft joints.

2. Remove the factory driveshaft.

3. Remove the pinion yoke after putting a drain pan under the differential. You don’t need to drain the oil, just a little will leak out when you remove the yoke.

4. Install the new pinion yoke and nut supplied by TeraFlex.

5. Remove the transfer case yoke after putting a drain pan under the transfer case. Some oil may leak out of the transfer case when you take the yoke off, but there is no need to drain the transfer case completely.

6. Install the new transfer case yoke. We recommend purchasing a new transfer case yoke nut from a Chrysler/Jeep dealer under part number 5143738AA.

7. Install the new driveshaft to the new yokes using u-bolts, split lock washers and nuts on the axle yokes. Use the 5/16 fine thread bolts and split lock washers on the CV yoke at the transfer case. (Make sure the balancing marks are aligned)


8. Check and refill oil as needed.

TORQUE SPECIFICATIONS:

• Transfer Case Yoke Nut - Front and Rear Output (22mm) Install and tighten new yoke nut to 122- 176 N·m (90-130 ft. lbs.)

• Front and Rear Pinion Yoke Nut (7/8”-20) Install new nut on the pinion gear and tighten nut to 217 N·m (160 ft. lbs.).

• 5/16” bolts and U-bolt Nuts tighten to 17 ft. lbs.

SERVICE & CARE:

Inspect the driveline regularly for tube damage. Grease every 3,500 miles with hi-temp grease in the u-joint & H-Block.​