Sooner0233
4/2/2008 8:46:03 PM
So I got my '03 F250 in some soft mud the other day and threw it in 4 low but couldnt get out. I got out switched the hubs from auto to lock and pulled right out. I did engage the 4 low again later and it seemed to work on auto.
Why would it not engage for me on Auto? Why does it have the locking hubs?
Hayapower
4/2/2008 10:10:52 PM
ESOF equipped trucks use vacuum to lock/unlock the hubs.. The hub 'lock' position is a fail safe mode.. Could have just been a glitch since they worked later on when tested.. But there is an open TSB 04-18-5 for a non engaging/staying engaged/unlocking condition caused by axle nose to hub contact, and a service procedure.. You might try the 'auto lock' off and on a bit and see if they hang again..
Hayapower
4/2/2008 10:18:16 PM
Technical Service Bulletin..
