I recently test drove my "new" 5 ton and found that i had no front wheel drive. I should say it worked some times and not at others. My understanding is that there is 2 air lines from the transmission to the tcase and the control an actuator which must engage the front wheel drive. Can someone direct me to someone or tell me where i should look for problems. There is no noises and i changed all the fluids and there was no metal. It is odd that sometimes i have it sometimes i don't. Anyhelp would be great. thanks jeff