Driveshaft Balancing - Using the MTS 4000

All vehicles 

1. Install the MTS 4000 to the vehicle.
2. Working under the vehicle, install an accelerometer. The accelerometer can be attached and mounted near either the transmission or differential end of the driveshaft.
3. Clean an area of the driveshaft and install the reflective tape, then install the photo-tachometer sensor. The sensor should be placed at approximately a 20-degree angle from perpendicular to the surface of the reflective tape. Make sure the sensor does not get moved during the balance procedure.
   1. Reflective tape.
   2. Photo-tachometer sensor.
Fig 1: Identifying Reflective Tape & Photo-Tachometer Sensor
Courtesy of FORD MOTOR CO.
4. Using the MTS 4000, run a driveshaft balance test with the driveshaft unmodified.

Vehicles with tapped pinion flanges 

5. Label the tapped holes in the pinion flange numerically, starting at the top hole as 1. Mark the remaining holes 2, 3 and 4. Label in the direction of rotation.
Fig 2: Numbering Tapped Pinion Flange Holes
Courtesy of FORD MOTOR CO.
6. Using the MTS 4000, run a second test with the 12 mm (0.47 in) test weight set screw in the No. 1 hole, previously marked on the pinion flange.
7. Remove the test weight, then install the weight combination directed by the special tool.
Fig 3: Locating Weight Combination
Courtesy of FORD MOTOR CO.

Vehicles without tapped pinion flanges 

8. Using the MTS 4000, run a second test with a test weight. Using a metal band, secure the test weight to the end of the driveshaft. The weight should be placed at the end of the driveshaft tube, as close to the tube-to-yoke weld seam as possible. Mark the location of the test weight on the driveshaft.
   1. Test weight.
   2. Tube-to-yoke weld seam.
   3. Driveshaft pinion flange.
   4. Select the test weight based on driveshaft size. Larger driveshaft use 10 grams. Smaller driveshaft use 5 grams.
Fig 4: Identifying Test Weight, Weld Seam & Pinion Flange
Courtesy of FORD MOTOR CO.
9. Remove the test weight, then install the recommended weight at the position directed by the special tool. Using a metal band and epoxy, secure the test weight to the driveshaft.
   1. Test weight.
   2. Measure in this direction.
   3. Driveshaft diameter.
   4. Directional rotation.
   5. Balance weight relative to test weight centerline.
   6. The results are displayed with respect to the location to where the test weight was placed.
Fig 5: Installing Weight In Recommended Position
Courtesy of FORD MOTOR CO.

All vehicles 

10. Using the MTS 4000, run a third test to verify the repair.