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I have 1990 Kodiak with an Eaton RT6610
transmission 1 to 1 Ratio. At 2200 rpm on 22.5 rubber I am going 55 mph, at 2400 rpm 60 mph. At 2600 rpm wide open 65mph. I can't find the rear end ratio anywhere on the differential (eaton). I have been told I have a 4.11 ratio. I would like to increase my mph while towing an 18,000 lb. trailer. I have considered changeing the transmisson to an overdrive or the rearend ratio. I need to have an idea of the difficulty of changing either one out and an idea of cost. Please advise. |
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