Never have run a 4840, but I would think that a 6030 would walk all over them when it comes to pulling. Can pull a 5 shank sub soiler with our 6030 and duals/no fluid at around two feet deep with fairly minimal slipage. However my uncle has a 4640 with fluid/duals and the same ripper on the same ground will stop the the tractor dead in its tracks. The only way he was able to use it was to tie up two shanks and make it a 3 shank. Now from the looks of it a 4840 is just a glorified 4640. Seems like the 4840 was not an adequate replacement for the 6030 when it came to drawbar pull. However I ran across the Nebraska tests years back and they indicated that drawbar pull on the 4840 was actually greater than the 6030 I think?? I find this hard to believe as I feel that the 6030 has to be one of the best 2 wheel drive tractors ever built for getting its power/weight to the ground. With the engine sitting lower in the frame than the 40's this has to be the biggest pulling benefit for the 6030. Thus creating a low center of gravity. I have run across a few other forums where people gripe about how the 4640/4840 can't get the power to the ground. I would even go as far to say that a 6030 would match right up with or out pull some MFWD tractors such as a 4455..etc. Anyone have any opinions/input on this?