under the dash, above the radio. take out speedometer module to get to it
check metal tag on transfer. for info.
Transfer case is bolted onto the transmission its a straightforward boat and boat out type of transfer 10 days if you have the BW 4406 we shouldn't be that hard but you will have to remove the cross member and have something to lower it down with because it's very heavy
Motorcraft MERCON automatic transmission fluid in your 4x4 transfer case
As long as the numbers match on side of trans the only problems you will have is the vss was moved to the rear diff in 1998 so the 1997 would need an entire wire over but if the f150 is. 4x4 then the speed sensor is in the transfer case which means your fine
transfer case is prolly blown up
Motorcraft MERCON automatic transmission fluid for the transfer case in a 1996 F-150 according to the owners manual
Look under the lower dash by the transfer case shifter.
It is next to the transfer case solonoid located underneath the damp control spectrometer.
The fluid level ( MERCON ATF ) should be at the bottom of the FILL hole when you pull the FILLER plug on your transfer case
Motorcraft MERCON automatic transmission fluid
Motorcraft MERCON automatic transmission fluid in the transfer case , according to the Owner Guide