OK when I put the truck in R and start to back up the truck makes a strange noise. It sounds like something winding up or maybe slipping but the truck backs up fine. I can't tell exactly where it is comming from because the truck has to be moving backwards not just in reverse. The sound only happens for a few seconds then it goes away. Could this be the rear end or is it the tranny or might be brakes? I have put 6k on the truck since I bought it so at 207k I don't know if the fluid has ever been changed
. I was planning to to a flush in the next week. Has anyone heard a noise like this before?
Thanks for your help.