How do you change a two wheel drive suburban into a four wheel drive?

Answer 1

first off i am not a professional but i do no you would have to get a front axel out of a 4x4 and also a transfercase and maybe the transmission it would be alot of work but if you can get the parts cheap enough it would be worth the time which it would take awhile to do it

This is a BIG project, requiring significant skills. You need the axle, springs steering linkage, transmission, transfer case, both driveshafts. You need to make sure the gear ratio matches your existing rear axle, and in most cases it won't because of the different usages between a 4 wheel drive and a 2 wheel drive vehicle.

You need the skills to mount the spring perches, replace the transmission, locate the mounting brackets for the transmission and transfer case, and set up and align the steering. This is critical, because it will affect how it drives down the road, so it affects safety.

So, can it be done, YES, . .however, if you have to ask the question HOW, you need to refer it to professionals, and at that point, you are probably better off buying one that it already 4wheel drive, rather than trying to convert.