4wd system
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Mountain Pass
Joined: May 2007
Posts: 223
Likes: 2
4wd system
I just bought an FX4 and pick it up tommorow. Just had a question for you knowledgable guys here. When you are in 2wd does the whole front end spin like the axles? Or does only the wheels spin when you are in 2wd? Reason I am asking it seems like with chevy the whole front end spins in 2wd.
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,602
Likes: 147
From: SE Georgia
Ford does not employ this system. Nor have they since the 80's...if even longer
The front hubs are vacuum UNLOCKED while you are driving around. The t-case is in 2wd only. The front axle and driveshaft are STATIONARY during normal driving
edit: unless you happen to have an AWD truck. Far as I know though, they 08 Limited was the only AWD F-150. Maybe a newer 09+, but I haven't seen one
Cross-Country
Joined: Dec 2009
Posts: 51
Likes: 0
From: Kansas City
no
Ford does not employ this system. Nor have they since the 80's...if even longer
The front hubs are vacuum UNLOCKED while you are driving around. The t-case is in 2wd only. The front axle and driveshaft are STATIONARY during normal driving
edit: unless you happen to have an AWD truck. Far as I know though, they 08 Limited was the only AWD F-150. Maybe a newer 09+, but I haven't seen one
Ford does not employ this system. Nor have they since the 80's...if even longer
The front hubs are vacuum UNLOCKED while you are driving around. The t-case is in 2wd only. The front axle and driveshaft are STATIONARY during normal driving
edit: unless you happen to have an AWD truck. Far as I know though, they 08 Limited was the only AWD F-150. Maybe a newer 09+, but I haven't seen one
Senior User
Joined: Jan 2011
Posts: 320
Likes: 0
My 2011 FX4 forward shaft is locked in and spins while moving that means the pumpkin is engaged to the front wheels. Chevy did this for 2-3 years around 2003 then changed it where the shaft was not engaged. That only made since. Why have parts engaged and spinning for no reason. That only wastes fuel and power. Ford needs to do the same.
Junior User
Joined: Apr 2010
Posts: 53
Likes: 0
From: Western, NY
On my 2011 xlt the frt. shaft does not turn when in 2 wheel drive. If you jack the front of the truck up and turn the wheel with the engine off the half shaft and drive shaft will turn. Start the truck and let the vacuum built and the frt hubs should disconnect and only the wheel should turn. The half shaft should not. The vehicle has to be running or have stored up vacuum to release the frt hubs. My 2006 had a bad hub and would not release fully and cause a vibration and higher level of drag when driving.
Senior User
Joined: Jan 2011
Posts: 320
Likes: 0
RG, you are right. I went started the truck and the front shaft will turn by hand. Turn off the truck and it locks back up.
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Mountain Pass
Joined: Feb 2007
Posts: 245
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From: Sandy, OR
I knew it wasn't engaged while running, but I didn't know it was vacuum controlled. Another thing I learned on FTE!
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Dave85zxt
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