My favorite gear was the cam gear on a Cummins 855 engine. Our 20 ton press bitched to remove it. To install it you heated it up for about an hour in a toaster oven. Meanwhile you get the cam stood on end in the press, throw hot cam gear on cam and run the press down on it quickly to keep the cam gear from creeping up off the seat as it cooled. Cummins had problems with peeling cam lobes back in the late 80's and early 90's. It was fun while it lasted, big iron.Cool! I hope to get some good mileage out of mine once it’s back together. Pressing 4th and 5th gear onto the countershaft has proven to be just as difficult as it was to press them off. I ended up breaking several teeth) during removal and had to buy new gears. I have another .0650 in. to go before they’re properly seated, but my 12 ton shop press is not up to the task. I may have to enlist the help of a good machine shop with a monster press to get it done.