Hi Guys,

I got a 2000 f150 7700 and had issues getting the shifter to move into 4wd. finally got it moving (still quite stiff) but now when in 4wd there is allot of resistance when driving. once i get up to about 30km/h i hear a humming noise coming from under the body (around the transmission area). i have checked and replaced fluids in the transfer case and front diff and the truck recently had a transmission fluid exchange.

any ideas want to get it working before the snow flies!!!

Cheers,
Pete.