I have a 1999 Ford F150, 4x4, automatic with the manual shift transfer case. In the owners manual, it says I can tow it 4 wheels down with the transfer case in neutral and by capping one of the vacuum lines to the front axle. Electronic shift transfer case equipped F150's are not towable 4 wheels down.
However, when I went to my local Ford dealer, I was told the manual was wrong and that I cannot tow my truck 4 wheels down. This was repeated by several technicians.
As I continue to research, every article I find says the same thing as the owners manual. Meaning as long as I have a manual transfer case and I cap the vacuum line, I can tow 4 wheels down.
Anyone have any experience with this that can help me out?
I've since sold it, but I had a 2000 F150 4x4 auto w/manual xfr case and I flat towed it without incident several times. It was never my primary toad but I towed it back & forth from my ranch to my home, twice a yr while I was still working. I followed the owners manual, except instead of capping that vacuum line, my Ford tech showed me a solenoid connection on the passenger side firewall. Removing that connection was essentially the same as capping the vacuumm line. It worked for me.
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