regearing
#1
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#5
You need to find the axle code. You can commonly find it on your door jam. Post it up here to find out what you have. I am betting you have 3.55s. The larger tires make up for the ratio change, so you will be fine as far as RPMs go. Highly recommend programmer too. Honestly your mileage will probably not improve a whole lot, but your power will with the gear change.
#7
ok thank you very much fro everyones help once i get the money together i am going to buy the 4.56 gears thanks again everyone. Another question tho is will the programmer affect the life of my engine with so many km on it because my dad put one on his 2001 gmc 2500 diesel and it messed up his towing abililty after about 150 000km with it on his turbo was shutting off and then the truck just wouldnt move with a trailer on it. any help will be greatly appreciated.
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#9
All the programmer does is change shift points,spark advance, and timing. Theres nothing to worry about. It just uses power that your stock "tunes" or settings wont allow for, because Ford set them to be acceptable to everyone. For example, some people like smooth shifting, where as, others like a firmer, crisper shift. I really like the Edge because I can monitor just about everything thats going on with the engine as well as mpgs and all that. I have 4:56 and 315s and my edge says that my average miles per gallon is 15.8. That is mixed driving, and my ratio mile per mile is almost 1:1 so I would tend to think thats pretty accurate.
H9 is 3:55LS if I remember correctly.
H9 is 3:55LS if I remember correctly.