My 4 Hi is working but when i engage 4 low (in neutral and foot on brake)(I'm sure) it doesn't engage. I installed a leveling kit today and its been the first rain we've had almost all year and the day i need it to not get stuck on my ranch, it don't work. I use it at least once a week if not every 3-4 days and this is the first incident of it not working. it didn't work at all this morning and then 4 Hi decides to start working.......any suggestions???