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Re: 1999 Fld70 Gear change questions for under power
Posted to HD/Fleet Forum on 4/23/2024 5 Replies

A suggestion would be to have a allison scan done if you can find someone that can do it. That way you can see the effect of the axle ratio change to see if it results in a improvement. I did this kind of work for Mack but don't have access to the allison prog... Login to read more.

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