I recently purchases a 2003 6 x 4 diesel gator with 600 hrs. Put about 4 hours on it when it developed an extremely loud noise when brakes applied, with vehicle not wanting to stop. Have to turn key off to stop. Also trans grinds when shifting into gear. Do not know if these could be related. Could the problem be anything other than brakes which I have been told could cost about $1,000.00 to repair. Any and all suggestions will be more than appreciated. Thanks.