Prevailing Torque Fasteners
Prevailing torque fasteners create a thread interface between the fastener and the fastener counterpart in order to prevent the fastener from loosening.
All Metal Prevailing Torque Fasteners
These fasteners accomplish the thread interface by a designed distortion or deformation in the fastener.
Nylon Interface Prevailing Torque Fasteners
These fasteners accomplish the thread interface by the presence of a nylon material on the fastener threads.
Metric Prevailing Torque Fastener Minimum Torque Development
| Application | Specification | |
|---|---|---|
| Metric | English | |
| All Metal Prevailing Torque Fasteners | ||
| 6 mm | 0.4 Nm | 4 lb in |
| 8 mm | 0.8 Nm | 7 lb in |
| 10 mm | 1.4 Nm | 12 lb in |
| 12 mm | 2.1 Nm | 19 lb in |
| 14 mm | 3 Nm | 27 lb in |
| 16 mm | 4.2 Nm | 37 lb in |
| 20 mm | 7 Nm | 62 lb in |
| 24 mm | 10.5 Nm | 93 lb in |
| Nylon Interface Prevailing Torque Fasteners | ||
| 6 mm | 0.3 Nm | 3 lb in |
| 8 mm | 0.6 Nm | 5 lb in |
| 10 mm | 1.1 Nm | 10 lb in |
| 12 mm | 1.5 Nm | 13 lb in |
| 14 mm | 2.3 Nm | 20 lb in |
| 16 mm | 3.4 Nm | 30 lb in |
| 20 mm | 5.5 Nm | 49 lb in |
| 24 mm | 8.5 Nm | 75 lb in |
English Prevailing Torque Fastener Minimum Torque Development
| Application | Specification | |
|---|---|---|
| Metric | English | |
| All Metal Prevailing Torque Fasteners | ||
| 1/4 in | 0.5 Nm | 4.5 lb in |
| 5/16 in | 0.8 Nm | 7.5 lb in |
| 3/8 in | 1.3 Nm | 11.5 lb in |
| 7/16 in | 1.8 Nm | 16 lb in |
| 1/2 in | 2.3 Nm | 20 lb in |
| 9/16 in | 3.2 Nm | 28 lb in |
| 5/8 in | 4 Nm | 36 lb in |
| 3/4 in | 7 Nm | 54 lb in |
| Nylon Interface Prevailing Torque Fasteners | ||
| 1/4 in | 0.3 Nm | 3 lb in |
| 5/16 in | 0.6 Nm | 5 lb in |
| 3/8 in | 1 Nm | 9 lb in |
| 7/16 in | 1.3 Nm | 12 lb in |
| 1/2 in | 1.8 Nm | 16 lb in |
| 9/16 in | 2.5 Nm | 22 lb in |
| 5/8 in | 3.4 Nm | 30 lb in |
| 3/4 in | 5 Nm | 45 lb in |
Approximate Fluid Capacities
The following approximate capacities are given in US English and Metric conversions. See FLUID AND LUBRICANT RECOMMENDATIONS for more information. All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck fluid level after filling.
| Application | Specification | |
|---|---|---|
| Metric | US English | |
| Cooling System | ||
| 2.8L V6 | 12.75 liters | 13.5 quarts |
| 3.0L V6 | 11.65 liters | 12.3 quarts |
| Engine Oil With Filter | ||
| 2.8L V6 | 5.7 Liters | 6.0 quarts |
| 3.0L V6 | 5.7 Liters | 6.0 quarts |
| Rear drive axle | ||
| Differential housing, rear | 0.7 liters | 0.74 quarts |
| Differential clutch with differential brake (ELSD) | 350 milliliters | 0.37 quarts |
| Transfer Case | 0.85 liters | 0.90 quarts |
| Fuel Tank | 79.5 liters | 21.0 gallons |
| Transmission Fluid | ||
| 2.8L V6 6-Speed Automatic (Transmission Requires No Fluid Replacement) | ||
| 3.0L V6 6-Speed Automatic (Drain and Refill) | 9.0 liters | 9.5 quarts |
Tire and Wheel Runout Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Tire and Wheel Assembly - Lateral and Radial | ||
| Off-Vehicle | 1.27 mm | 0.050 in |
| On-Vehicle | 1.52 mm | 0.060 in |
| Wheel, Aluminum | ||
| Lateral | 0.762 mm | 0.030 in |
| Radial | 0.762 mm | 0.030 in |
| Wheel, Steel | ||
| Lateral | 1.143 mm | 0.045 in |
| Radial | 1.015 mm | 0.040 in |
| Wheel Hub/Axle Flange - Guideline | 0.132 mm | 0.0052 in |
| Wheel Stud - Guideline | 0.25 mm | 0.010 in |
Propeller Shaft Runout Specifications
| Application | Front Runout | Center Runout | Rear Runout | Stub Shaft Runout | ||||
|---|---|---|---|---|---|---|---|---|
| Metric | English | Metric | English | Metric | English | Metric | English | |
| 1 Piece Propeller Shaft - Guideline | 1.17 mm | 0.046 in | 1.27 mm | 0.050 in | 1.40 mm | 0.055 in | ||
| 1 Piece Aluminum Graphite Propeller Shaft - Guideline | 1.17 mm | 0.046 in | 1.40 mm | 0.055 in | ||||
| 2 Piece System Front Propeller Shaft with Slip Yoke - Guideline | 0.76 mm | 0.030 in | 0.76 mm | 0.030 in | 0.71 mm | 0.028 in | ||
| 2 Piece System Front Propeller Shaft with Stub Shaft - Guideline | 0.76 mm | 0.030 in | 0.76 mm | 0.030 in | 0.13 mm | 0.005 in | ||
| 2 Piece System Rear Propeller Shaft with Slip Yoke - Guideline | 0.71 mm | 0.028 in | 0.76 mm | 0.030 in | 0.89 mm | 0.035 in | ||
| 2 Piece System Rear Propeller Shaft with Stub Shaft - Guideline | 0.76 mm | 0.030 in | 0.89 mm | 0.035 in | 0.13 mm | 0.005 in | ||
| These guidelines apply only to propeller systems with 2 or 3 U-joints. | ||||||||
Driveline Runout Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Differential Pinion Input Shaft or Flange Pilot | 0.05 mm | 0.002 in |
| Torque Tube Input Flange | 0.20 mm | 0.008 in |
| Transmission or Transfer Case Output Flange | 0.20 mm | 0.008 in |
| These guidelines apply only to propeller shaft systems with a constant velocity (CV) joint, rubber coupling, or bolt-on U-joint yoke. | ||
Driveline Torque-Load Conditions
An drive axle that has internal conditions such as excessive runout of components, misalignment of components, imbalance, etc., can produce vibration concerns which may be transmitted into the propeller shaft, or shafts. This sort of a vibration occurrence can increase or decrease in severity based primarily upon torque-load, but can also be affected by cold or hot conditions.
The propeller shaft and other related components may or may not pass inspections for wear or damage, runout, alignment, etc., depending upon whether there is only one vibration source or more than one.
Vibration in Service-Stall Test (Non-Torque Sensitive)
Special Tools
EL-38792-A Electronic Vibration Analyzer (EVA) 2
| WARNING | Do not fill the propeller shaft with foam, oil, or any other substance in order to correct a vibration. Filling the propeller shaft is only effective in reducing an unrelated condition called Torsional Rattle. Filling the propeller shaft should only be done in strict adherence to the procedure outlined in corporate bulletins that address Torsional Rattle. Failure to follow the correct procedure will induce a vibration and/or affect the structural integrity of the propeller shaft. The propeller shaft will then have to be replaced. |
- Turn the ignition ON but do not start the engine.
- Place the transmission into NEUTRAL.
- Raise and support the vehicle. Support the drive axle or axles at curb height. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-652230-S26645367622014082300000).
- Remove the tire and wheel assemblies from the vehicle. Refer to «TIRE AND WHEEL REMOVAL AND INSTALLATION»(ref-652234-S18162824462014082300000).
- Remove the brake rotors or drums, if equipped, from the drive axle or axles.
- Inspect the propeller shaft or shafts. All propeller shafts should be free of undercoating before continuing.
- WARNING: Do not depress the brake pedal with the brake rotors and/or the brake drums removed, or with the brake calipers repositioned away from the brake rotors, or damage to the brake system may result. Have an assistant start the engine.
- Place the transmission in the highest forward gear.
- Accelerate and decelerate the vehicle through the speed range at which the vibration was first noted during the Vibration Analysis-Road Testing procedure.
- Record whether the vibration was present, and at what speed.
- If the vibration is present, determine which end of the propeller shaft is vibrating the most. Hold the vibration sensor of the EL-38792-A Electronic Vibration Analyzer (EVA) 2, up to the pinion nose and the transmission or transfer case tailshaft housing.
- If the vehicle is equipped with a multiple-piece propeller shaft, hold the vibration sensor of the EL-38792-A EVA 2 up to the propeller shaft support bearing assembly, or assemblies to inspect for vibration.
- If the transmission or transfer case output shaft housing is vibrating, hold the vibration sensor of the EL-38792-A EVA 2 up to the transmission crossmember under the transmission mount. If there is no vibration on the crossmember, then the transmission mount is working properly.
- Record which end of the propeller shaft is vibrating the most, and how severe the vibration is. The inspection will be a reference by which to judge future progress.
Vibration in Service-Stall Test (Torque Sensitive)
Special Tools
EL-38792-A Electronic Vibration Analyzer (EVA) 2
| WARNING | Do not fill the propeller shaft with foam, oil, or any other substance in order to correct a vibration. Filling the propeller shaft is only effective in reducing an unrelated condition called Torsional Rattle. Filling the propeller shaft should only be done in strict adherence to the procedure outlined in corporate bulletins that address Torsional Rattle. Failure to follow the correct procedure will induce a vibration and/or affect the structural integrity of the propeller shaft. The propeller shaft will then have to be replaced. |
- Turn the ignition ON but do not start the engine.
- Place the transmission into NEUTRAL.
- Raise and support the vehicle. Support the drive axle or axles at curb height. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-652230-S26645367622014082300000).
- Remove the tire and wheel assemblies from the vehicle. Refer to «TIRE AND WHEEL REMOVAL AND INSTALLATION»(ref-652234-S18162824462014082300000).
- Remove the brake rotors or drums, if equipped, from the drive axle or axles.
- Hold the vibration sensor of the EL-38792-A Electronic Vibration Analyzer (EVA) 2, against the pinion nose.
- WARNING: Do not depress the brake pedal with the brake rotors and/or the brake drums removed, or with the brake calipers repositioned away from the brake rotors, or damage to the brake system may result. Have an assistant start the vehicle.
- Place the transmission in the highest forward gear.
- Accelerate and decelerate the vehicle through the speed range at which the vibration was first noted during the Vibration Analysis-Road Testing procedure.
- If a vibration is present, note the EL-38792-A EVA 2 reading during acceleration or deceleration.
- Note as to whether or not the pinion nose vibrates under load during acceleration or deceleration.
- If the vibration is not reproduced, reinstall the brake rotors and/or drums and the wheel/tire assemblies to put an additional load on the system. Perform steps 7 - 11 and check the components again.
- If the vibration is still not reproduced with rotors and/or drums reinstalled, lightly apply the brakes to further load the system while maintaining the vibration concern speed.
- If the pinion nose vibrates under acceleration or deceleration, and other driveline components have been eliminated as a cause, the vibration may be an internal axle problem.
Torque Tube Input Flange Runout Measurement
Special Tools
GE-7872 Magnetic Base Dial Indicator Set, or equivalent
Note. This measurement procedure is intended to measure torque tube runout for systems with a constant velocity (CV) joint, rubber coupling or bolt-on U-joint yoke at the torque tube.
- Place the transmission into NEUTRAL.
- Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-652230-S26645367622014082300000).
- If equipped with a CV joint, measure the torque tube input flange radial runout on the machined surface of the prop shaft rear CV joint housing, as close to the flange as possible: 3.1. Clean the surface of the prop shaft rear CV joint housing just ahead of the torque tube input flange. 3.2. Mount a dial indicator set, GE-7872 Magnetic Base Dial Indicator Set, or equivalent, and position the dial indicator to contact the prop shaft rear CV joint housing as close to the torque tube input flange as possible.
- If equipped with a rubber coupling or bolt-on U-joint yoke, measure the torque tube input flange radial runout on the machined surface of the flange pilot area: 4.1. Mark the position of the prop shaft to the torque tube input flange. 4.2. Separate the propshaft from the torque tube input flange. 4.3. Clean the surface of the flange pilot area. 4.4. Mount a dial indicator set, GE-7872 Magnetic Base Dial Indicator Set, or equivalent, and position the dial indicator to contact the pilot area as close to the end of the pilot as possible.
- Rotate the torque tube input flange by hand to locate the low spot.
- Set the dial indicator to zero on the low spot.
- Rotate the flange by hand and record the amount of radial runout.
- Compare the runout of the flange to the runout tolerance specifications guideline.
- If the torque tube input flange runout exceeds the specification, the flange requires replacement.