RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
6.
Using a feeler gauge, measure the clearance between the caliper slide surface and the knuckle mounting arm (both top and bottom) (Figure 1).
Take separate measurement at inner and outer portions of both top and bottom slides.
**The total for inner and outer clearances should add to 0.010 in. to 0.026 in. (e.g. top left inner + bottom left inner = 0.010 in. to 0.026 in., top
left outer + bottom left outer = 0.010 in. to 0.026 in., etc.). If the total clearance is within specifications, but an individual measurement is low, the
knuckle rail can be lightly filed to increase the clearance. If the total clearance is out of specifications, replace the caliper and/or knuckle assembly.
NOTE:
IT IS POSSIBLE TO HAVE NO CLEARANCE ON ONE END (EITHER THE TOP OR BOTTOM) OF THE CALIPER AS LONG AS THE
TOTAL CLEARANCE ADDS TO 0.010 IN. TO 0.026 IN. FOR THE INNER READING AND 0.010 IN. TO 0.026 IN. FOR THE OUTER
READING. THIS CAN HAPPEN AS A RESULT OF RAM TRUCKS USING A FLOATING CALIPER AND WHAT OCCURRED TO THE
BRAKES JUST PRIOR TO CHECKING THE CLEARANCES.**
7.
Record the caliper to slide clearance.
8.
Install new cotter pin into axle shaft.
9.
Remove the rear wheels and brake drums. Perform an inspection of the rear brakes. Verify that there is no differential grease leaking from the rear
axle seal or brake fluid leaking from the wheel cylinder onto the brake shoes and linings. Repair any rear brake components or rear axle seal(s) as
necessary and adjust rear brakes. Refer to the 1997 Ram Truck Service Manual (Publication No. 81-370-7108), Groups 3 and/or 5 for proper
brake and/or differential service.
10.
Verify that the proper size wheel cylinders and calipers are on the vehicle. Wheel cylinder diameter is cast in the outside surface of the wheel
cylinder barrel (a cast 4 = 23.8 mm and cast 7 = 27 mm). Caliper sizes can be identified by measuring the length of the lower caliper slide rail. 86
mm caliper slide rail measures 4.75 inches, 80 mm measures 4 inches. Using a tape measure, measure the length of the lower slide rail.
