Here's a video of the same model tractor but with a v-8 engine. More than twice the power of mine. Notice driver is wearing hearing protection and you can 'hear why!' The implement he's pulling is'nt very wide--especially by todays standards--but it pulls hard. Still, he says he's pulling it in 6th gear and probably 6-7 mph. The tractor has 8 gears forward. His rear tires are 26" wide while mine are 30". Suppose he has the huge 1500 lb weights inside EACH rear wheel and maybe even some 'fluid' in the tires in order to have the traction needed for so much horsepower. When you up the horsepower this much from factory specs you surely have to be overloading the 'rearend' and axles. I'd expect a lot of 'downtime' with this tractor.
Headphone plugged into your computer will allow you to fully appreciate the sound of this tractor.
http://www.youtube.com/watch?v=OXLP4XA-fLc
Years ago a rich farmer south of us in an area called 'The Goose Pond' used several pairs of 5020's-one hooked onto the front of the other--each with big Caterpillar engines to plow that extra tough soil. I never seen this but wish I had.
BIG BUD:
http://www.youtube.com/watch?v=9Dw_6k16 ... re=related

I seen Big Bud in action at Rantoul, Ill. Well worth the trip. Pulled a 15-18s bottom plow. Know it could have pulled quite a bit more. Engine has a great sound. It's been around the country since first built and now is on a large wheat farm not many miles from where it was built. They hooked it to, I believe, 2 'pulling sleds' at Rantoul (wasn't there that night) and it pulled them both, both loaded to the max. You can see this on YouTube.
1000 hp--95,000 lbs. A real monster. Believe the largest 4-wheel drive John Deere tractor has 560 hp.
Don