We are in trouble here in central Ga. 5.5" of rain on already wet ground and more to come has put a halt to corn harvest before it ever really got started.Have any of you guys ever ran an older combine without 4WD and then added 4wd to it.How much difference does it make?I have a Gilcrest 4WD axle set up on one of my combines that current is not in running condition that I am seriously considering pulling out and sticking under the Dominator 76 that I bought back in Janurary.I am already going to put duals on the front and probably on the rear too but I really need to know from someone that has ran a combine both ways is it going to be worth my effort to swap it.I need input PLEASE.