Will Cunningham
Member
Ok, here is what I suspected and fixes applied so far.
Suspected a bad IWE and/or hoses. Replaced both IWEs and all hoses and check valves to IWEs all the way to the solenoid. Solenoid checked out per TSB guidelines. After replacing the hoses and check valves, the vacuum levels at all points meet or exceed TSB guidelines. Still have the 'growl' when first moving or turning at low speed and low rpm. Replaced both front hubs even though they seemed ok (94k miles). Then applied TSB 22-2219 which basicially allows the 4wd to be available without waiting for the IWEs to engage. The vacuum lines are capped off, so the IWEs are always engaged at the wheel hub. The 4WD would be activated through the transfer case.
I still have the low 'growl' when first starting or turning, but goes away if the rpms are higher. Worse if I am turning uphill at low rpm( going into my driveway) even after driving 5-10 minutes. It sounds like the IWE is trying to engage, but I know they are already engaged in the hub. The transmission was serviced about 5,000 miles ago(Ford Dealership that has a very good reputation), so I am wondering if this must be transmission related. I have not checked the tranny fluid yet, but am suspecting it may be a little low.
Bugging the heck out of me, plus growling noises usually are not a good sign. May have to take to the dealer. No codes showing anywhere either.
Any help and suggestions would be greatly appreciated!!!!
Suspected a bad IWE and/or hoses. Replaced both IWEs and all hoses and check valves to IWEs all the way to the solenoid. Solenoid checked out per TSB guidelines. After replacing the hoses and check valves, the vacuum levels at all points meet or exceed TSB guidelines. Still have the 'growl' when first moving or turning at low speed and low rpm. Replaced both front hubs even though they seemed ok (94k miles). Then applied TSB 22-2219 which basicially allows the 4wd to be available without waiting for the IWEs to engage. The vacuum lines are capped off, so the IWEs are always engaged at the wheel hub. The 4WD would be activated through the transfer case.
I still have the low 'growl' when first starting or turning, but goes away if the rpms are higher. Worse if I am turning uphill at low rpm( going into my driveway) even after driving 5-10 minutes. It sounds like the IWE is trying to engage, but I know they are already engaged in the hub. The transmission was serviced about 5,000 miles ago(Ford Dealership that has a very good reputation), so I am wondering if this must be transmission related. I have not checked the tranny fluid yet, but am suspecting it may be a little low.
Bugging the heck out of me, plus growling noises usually are not a good sign. May have to take to the dealer. No codes showing anywhere either.
Any help and suggestions would be greatly appreciated!!!!