Have JD l111 , change drivebelt , center pullys and it was working fine last week . Cut grass no problem . Yesterday , started up while driving to clean it , I noticed rattling of the park brake . After hosing it down , I restarted and tried to go in reverse but would not catch right away , went forward but was slow at first and brake lever was rattling . Stopped check center pullys , all good , noticed transmission fan had broken fans . Could broken cause this problem?