How do you change a 1999 ford F-150 rear wheel drive to a four wheel drive?

Answer 1

It's a process involving a lot of labor, and some definite financial investment. The easiest route is to find a wrecked 4wd model with the same engine and transmission options, and just swap the transmission tail shaft, transfer case, drive shafts, front axle, front suspension, front brakes, various crossmembers, some interior panels, and possibly even the Engine Control Unit (ECU), as this frequently controls the transmission in modern vehicles.

Put short, it's far easier, and takes less time (you wouldn't be able to drive your vehicle during the interim) to simply go purchase a vehicle equipped from the factory with 4wd.

unless you have lots and lots of money, it is cheaper just to buy a 4x4

to make 2 wheel into 4x4, u need to change the front suspension,u then need to buy a front axle with a differential that mathes the rear differential.nect you need new gear box and transfer case,next you will need to shorten drive shaft and purchase driveshaft for front axle.then you need to find someone to do all the work.you will also need to change computer that covers 4x4,electric harness for 4x4 and switches etc for dash .along with this the brakes on front axle may have to be purchsed seperately

it is not an impossable job but is cheaper just to buy a 4x4 vehicle