are you sure you have the hubs locked in? if automatic hubs then it probably needs manual hubs put in.
You have to be stopped and transmission in neutral
a range is were a cowboy washes his bull.
The dash warning lights all mean different things on a Ford F150. This can include a check engine light, or a low oil light.
To put into 4 low foot must be on the brake stationary and vehicle in neutral .
low side is next to or on conpressor.has blue cap on low side red cap on highside
On the receiver/dryer.
The low side is on the accumulator and the high side is on the discharge line......
Fuel pressure on a 2002 Ford F150 4.2 V6 should be around 40 PSI. When pressure drops too low, fuel is not vaporized properly.
advance your timing
It might be a problem with the "clock spring".
I recently had that problem with my Ford f150 '07 truck and it was my spark plugs
I have an 86 and it is. If first gear is not really low, it probably is.
left side on firewall should be on the side of ac condencer