(F-100/350, P-350/400, P-3500/4000 and E-300 - 1965-1970)
If rear axle housing misalignment is suspected, perform the checking procedure outlined below.
This article describes the procedure for checking rear axle alignment to determine if a complaint of abnormal rear tire wear is actually the result of a "bent" rear axle housing.
- 1. Raise both rear tires off of the ground.
- Dana Model No. 44 - "0" Inch to 1/4 inch toe-out
- Dana Models No. 60-3, 60, 70 - "0" inch plus or minus 1/4" toe-out
- Dana Model 44 - "0" Inch to 3/16 Inch - Positive Camber
- Dana Models No. 60-3, 60, 70 - "0" Inch to plus or minus 3/16 Inch - Camber
2. Using chalk or a suitable marking medium, mark a strip approximately 1/2 to 1 inch wide in the center of each rear tire tread, turning each wheel to get an even distribution around the tire circumference.
3. Using a trammel bar or equivalent, scribe a mark in the chalked (marked) section of each rear tire by slowly rotating the wheel/tire while scribing the mark.
4. Place a chalk mark on the outside side wall of both rear wheels to be used as a "reference mark".
5. With both "reference marks" pointing to front of vehicle, measure the distance between the scribe marks (center of each rear tire) of both rear wheels at the "reference mark" area. Record this measurement which is the "front of tire" reading.
6. Rotate the rear wheels so that the "reference mark" of each rear wheel now points to the "rear of vehicle". Measure the distance between the scribe marks on the center of each wheel at the "reference mark" area. Record this measurement which is the "rear-of-tire" measurement.
7. Subtract the above "rear-of-tire" measurement from the "front-of-tire" measurement to obtain the "toe-out" condition of the rear axle being checked. The following are the toe-out specifications for each axle assembly:
9. Average the "front-of-tire" reading and the "rear-of-tire" reading, and using this average figure, note, that if the "bottom-of-tire" reading is greater than this average figure, the camber reading is negative (-); if the "bottom-of-tire" reading is smaller, then the camber is positive (+). The following are the camber specifications for each axle model:
camber specifications for axle model:
WARRANTY STATUS: INFORMATION ONLY