The center shaft that goes through the center of the transmission is longer on the 4x4 trans. so the transfur case will fit on it. 2x2 trans. shaft is shorter cause you have no transfur case.
That would be the 4L60E transmission. The 4L80E was used in the 3/4 tons
It'll bolt up to the engine, but the problem is that you'll either have to fabricate a cover for the rear of the engine and an adapter to mate the output shaft to the driveshaft. The difference between a 4x4 transmission and a 4x2 transmission is that the 4x4 transmission was designed to bolt up to a transfer case, not directly to the driveshaft.
8 because 4x2 is 8 and 4x4 is sixteen so if you subtract 8 from sixteen you get 8
6x4 has three axles, and two of them are live axles. 4x2 has two axles, and only one is a live axle.
Yes
A 4x2 vehicle has 4 wheels with the 2 rear wheels that drive. A 4x4 vehicle has 4 wheels with all 4 wheels that drive.
The 4L80E transmission
If they are both 4x2 and 4.3 engines then yes it will fit, but it will not wire up the same give that the '91 is most likely a 700R4 and the '99 is most likely a 4L60E. One is vacuum controlled the other is computer controlled.
For example: 4x2-36 = (2x-6)(2x+6) when factored and is the difference of two squares
4x2 is propeled by only 2 wheels but w/ extra H-Power the 4x4 is propeled by all 4 wheels w/ the same amount of H-Power.
it is a 700r4
YES. But you will have to get a 2-wheel drive 4L60E transmission to replace the 4-wheel drive transmission. Reason is that the center shaft that's running through the 4x4 transmission is longer so the transfer case will slide up on it. The 2-wheel drive center shaft is shorter cause there is no need for a transfer case.