99 f150 stuck in 4wd

Asked by Oct 30, 2016 at 10:03 PM about the 1999 Ford F-150 Lariat 4WD Extended Cab SB

Question type: General

The dash features a selected dial
which I've replaced so my question is
should the vacuum be pulling at the
solenoids for 2 and 4 wd as t the
samectimr? If not is it the actuator on
the firewall or something else causing
it to be stuck in 4 low? Thanks

1 Answer

92,685

Fords had two systems, one was mechanical the other electronic, so you stated it had a dial so that tells me it is electronic, the most common failure is the transfer case shift motor, you can try lightly tapping on the shift motor while someone switches it from 4low to 2 HI and see if it runs just long enough to switch it, if it doesn't run then you can remove it and shift the transfer case manually and then cover the hole with some duct tape until you can get the systems electronics and wiring checked. But if it does run and shifts then all you have to do is replace the shift motor assembly, and make sure you follow the directions precisely or you will mess things up.

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