This heavy duty top cap weld directly to the differential casting for the Super Duty front Dana 60 1999-2004 axle
to allow mounting of driver side upper control arm brackets.
Stronger Design, Lighter Weight, Easier Install
The Front Dana 60 that works with this kit is from Ford Superduty F-250 and F-350 trucks from model years 1999-2004 (leaf spring). This truss is not intended for other year axles due to different differential offsets and casting contours.
Only works with Front APEX Truss JL6540 which is in kits JL6541, JL6542, or JL6543. Uses JL6500 UCA brackets for mounting bushings or Johnny Joints.
Trimming of the factory differential casting will be necessary (see instructions). Other fabrication and modifications may be needed due to variances in lift kits and other factors. Differential casting will need to be trimmed along the top edge right under the UCA slots on the truss at a 45 degree angle approximately 1/4" deep. Test Top Cap on diff first and if it doesn't sit flush on the edges, check for casting protrusions
*** In rare and extreme cases, the truss may come into contact with oil pan. Prior to operating the vehicle, remove the coil springs, cycle the suspension including full compression of both sides simultaneously and add bumpstop extensions to prevent damage to oil pan.