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FSM09
FSM09, Other
Category: Transmissions
Satisfied Customers: 3588
Experience:  Ford Senior Master, specialty in diesels, drive trains, and powertrain.
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2001 Ford F-350 4wd doesn't switch automatically when switch

Customer Question

2001 Ford F-350 4wd doesn't switch automatically when switch activated. Kee in mind we haven't turned in 4 Wd since we've owned it.
Submitted: 1 year ago.
Category: Transmissions
Expert:  FSM09 replied 1 year ago.

Hello, when you switch it into 4wd do the 4wheel drive light come on and the front wheels just don't engage?

Customer: replied 1 year ago.
but they are engaged if done manually
Customer: replied 1 year ago.
Since I cannot get a second answer on theF350 this account will be closed and is consider paid in full.
Expert:  FSM09 replied 1 year ago.

The auto hubs don't work because all of the vacuum seals are wore out. The hubs rely on vacuum to engage and disengage the auto hubs. Overtime of not being used the seals become weak and cracked. You will need to resell the front hub assemblies to correct your concern.