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I have been having problems with my 05 F-150 4x4/5.4 trying to shift into 4x4 low while driving. The l4x4 dash light comes on and then it starts to grind as if it trying to shift into gear. I taken it to the ford dealer twice and i am still having problems. The first time they re-programmed the Powertrain control module. (TSB revealed proplem) The next time 3 months later they replaced a cellenoid and a vacuum part. Any ideas why this continues to be a problem?
Thanks
Thanks