Profile: Redwood Reliance Sales Co. designs and manufactures vocational trailers. Our products include transfers, super dumps, refuse trailers, end dumps, chip trailers,weld truck bodies and trailers. Our end dumps features stable frameless construction, oscillating kingpin plate, rubber-bushed body seats, cab-operated airlift tailgate, with independently air-actuated spring brake latches, steel sloped rear fenders and removeable body stand.