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Old 03-25-2019, 08:53 PM   #10
FED 387
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Default Re: How much weight towed with a 98.5-01 Cummins dually?

You most likely have a Dana 80 rear end. Try contacting a company caked Diesel Power Prodhcts they list many gear ratios for that rear from a 3.55 up to a 5.13 see what they say the r&p prices are around $300 or so depending on the gear you select. Small parts are available to complete the installation --- I have no experience with this company but I'm sure you can find reviews on themFED 387
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