02-02-2012, 09:24 PM
Join Date: Aug 2010
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no 4x4, and defrost mode
Headed back out to the ranch this weekend, the ranch is getting lots of rain which means i need my 4x4 to work on my 06 6.0.
So last weekend I almost got stuck b/c my 4x4 didn't engage, I had to get out in the mud and lock the hubs. Not fun. A mess really.
So this week I tried to fix it myself. When I checked the hubs with the Mighty Max hand pump, I can get 20lbs to hold for several min with no drop. I also ran the pump and it was pulling 11 lbs to lock and 8 to unlock.
So I felt that I should replace the pump and the PVHS (pulse vac hub solenoid)
Rechecked and got more vac, 14 on lock and 10 to unlock.
That all said...when I put it in 4X4, my vents go in to defrost mode.
What am I missing here?
Thanks for the help folks. Heading to the ranch on Friday afternoon to get some work done. If I can keep from getting out it would be great.
I will have Mighty Max with me so if I need to check something else yall recommend, i can give it a try
RR AKA Jason