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Message: [QUOTE="Vader's Fury, post: 342301, member: 473"] Well I was able to get some info on the truck from the International dealer. I went out to look at the actual truck and of course all the label plates were either missing or unreadable. It came with an 7.3 idi engine, Allison at545 trans, and a Spicer F-155 rear geared with 4.33's. Using a .72 final trans gear ratio I will be doing 2250 rpm at 75 mph. I was hoping to be closer to 2000 rpm as that always seems to be a sweet spot witht the 7.3 for fuel mileage. I will be looking into a gear swap for the rear but as of right now I dont believe it will be necessary to get me close to where I wanna be. So I am thinking for simplicity a manual would be a lot easier choice(lack of electronics) but that will limit who is capable of driving the truck. While I will admit, 99% of the time I will be driving the truck, when you get on long road trips it is nice to be able to pass the wheel to someone else for a period of time and get some time to relax. Also the other challenge with a manual will be the clutch setup. This truck is already equipped with an auto trans so the shifter and cable linkages are already there. The actual programming could be controlled by a pcs. I believe that elite is working on getting the bugs worked out on a 5R110 with a pcs. So are there any other options that would be worth looking into as far as automatic transmissions are concerned? Like I said I have a 4r100 and while that would work, I am looking to see if anything would be better Edit: I just looked up the gear ratio's of the 4R100 and the 5R110 and 3rd and 4th in the 4R100 is the same as 4th and 5th in the 5R110. So from that point I don't see any point in using the 5r over the 4r. Getting moving the extra gear will make things a little easier but when traveling at highway speeds the rpm jump will be the same with either trans. [/QUOTE]