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 .
On the receiver/dryer.
low side is next to or on conpressor.has blue cap on low side red cap on highside
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".
left side on firewall should be on the side of ac condencer
I have an 86 and it is. If first gear is not really low, it probably is.
I recently had that problem with my Ford f150 '07 truck and it was my spark plugs