Yo Steevereno,
As so well advised!
"U-Joint Inspection
Prior to checking driveline angularity, inspect the universal joints for proper operation.
Place the vehicle on a frame hoist and rotate the driveshaft (4602) by hand. Check for rough operation or seized universal joints. If the universal joint shows signs of seizure, excessive wear or improper seating, scribe alignment marks on the driveshaft and rear axle companion flange. Remove the driveshaft and remove and replace the universal joint. Install the driveshaft in the marked original position."
"When U-joint yokes are assembled to their shafts in the same plane, they are in phase. When they are assembled to the shafts in different planes, they are out of phase.
To obtain vibration-free operation, check and correct as necessary.
NOTE: On vehicles with a slip spline on the last coupling shaft, the yoke, which is part of the driveshaft slip yoke (4841), should be considered part of the coupling shaft.
Mark splined driveline components prior to disassembly to ensure that they have the same relative orientation when reassembled.
U-Joint Phasing
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Universal Joint TSB 97-20-15 by Ford for 90-96:
ISSUE: Available U-joints for driveshaft service are not always identifiable through model application charts. Some customers may request greaseable U-joints as a personal preference.ACTION: Refer to the following Service Information for availability of U-joint with grease fittings.SERVICE INFORMATIONTO IDENTIFY U-JOINT BY MEASUREMENT:1. Remove the old U-joint.2. Measure U-joint using the following measuring procedure.a. Remove bearing cups.b. Remove excess grease from bottom of bearing cups and trunnions.c. Remove seals from bearing cups and trunnions.d. Reinstall bearing cups on trunnions.e. Measure as follows, permitting a tolerance of ±0.005" at Dimension "G" in Figure 1 with Dimension "D" and "E" at ±0.003".
Figure 1 - Article 97-20-15
3. Identify U-joint part number using reference dimensions in the Light Truck Cross Reference Chart found at the end of this TSB article.TO IDENTIFY GREASEABLE U-JOINT FOR SERVICE:For customers who demand greaseable U-joints due to their specific vehicle duty cycle, refer to Light Truck Cross Reference Chart found at the end of this TSB article.Greaseable U-joints are typically recommended only for vehicles which operate 100% of the time in a high grit environment (e.g., coal mines).NOTE: GREASEABLE U-JOINTS DO NOT CONTAIN END PLAY THRUST WASHERS AND MAY CAUSE NOISE/VIBRATION/HARSHNESS (NVH) CONCERNS ON CERTAIN APPLICATIONS.
OTHER APPLICABLE ARTICLES: NONEWARRANTY STATUS: INFORMATION ONLYOASIS CODES: 509000, 590000, 597997"
by Ford
