Was wondering if anyone else has had or heard of the following problem: I have 97 F150 4X4 off road, three door. 90% of my driving is in the mountains (7,000 feet). At 40,000 miles front & rear brakes were completely redone at a Ford dealer. The front needed to be replaced and the rear were done because the brakes shoes (both shoes) had cracks in them. Now 40,000 miles later after checking, again both brake shoes have cracks in them. There is at least another 20,000 miles ware available on them. The replacement shoes are OEM. Has anyone heard of this ? ? Thanks, Carl,