My 2001 JD 4200 compact tractor suddenly started stalling out when either the forward or backward pedal is depressed. When operating and you push the forward pedal it will move a few feet then bog down and stop. When I pulled out the screen transmission filter, it had a lot of metal filings in it. Dealer said it was not a transmission problem but a brake problem. But because the brakes are tied in to the hydrostatic transmission, all would have to be replaced. Would like to know if anyone else has had this problem and if so, did you have to replace the whole transmission to fix the brakes.