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Gear ratio???
I don't know what my gear ratio is on the rig. Everything is in the sig, I tried the conversion but can't see anything stamped on the diff. cover, and on the door where it says "Axle" there is no number ....
I can tell you this though, at 55mph I'm at about 1800rpm, and at about 71mph I'm at about 2600 rpm. Both on fairly flat road. 4.10's? I dunno how to figure it out
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4R100 trans. Gear ratio you would have to give us the code on the door. Or remove the diff cover and read the stamp on the ring gear. It is there trust me on that. Only problem is you would have to change your diff fluid at this time as well. Or you can mark the driveshaft, mark the tires. Put the rear on jackstands. Chock block the front tires so the truck won't roll, put the trans in nuetral and spin the tires. Count how many revolutions the driveshaft makes for 1 revolution for the tire. This will give you a pretty good idea on what gear ratio you have.
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