1999 4x4
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Senior User
Joined: Mar 2003
Posts: 397
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From: nova scotia, canada
1999 4x4
I'm hoping that someone can take a few seconds and explain the way that the 4by system is engaged? The transfer case is engaging and the front shaft is turning but power is not gettitng to the front wheels. The truck in question does not have any "hubs" as I know them. is there a switch or something in the front rear end. thanks
truck in question is a 99f150,4x4,xcab, auto, 4x4 shifter is on the floor.
truck in question is a 99f150,4x4,xcab, auto, 4x4 shifter is on the floor.
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
1999 4x4
There is a vacuum operated servo on the right front axle. Basically when you put it in 4x4 vacuum is sent to the servo which then couples together the axle and the shaft that goes into the front diff.
If you do a search with the search button you'll find quite a few questions on these. The more common problems are broken or disconnected vacuum hoses and bad vacuum solenoids which send the vacuum to the servo on the diff. The solenoids are mounted on the firewall near the battery.
Take a look at https://www.ford-trucks.com/forums/s...hreadid=130002 for a picture and some info.
If you do a search with the search button you'll find quite a few questions on these. The more common problems are broken or disconnected vacuum hoses and bad vacuum solenoids which send the vacuum to the servo on the diff. The solenoids are mounted on the firewall near the battery.
Take a look at https://www.ford-trucks.com/forums/s...hreadid=130002 for a picture and some info.
