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High RPM


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1 hour ago, Blue Nile trucker said:

Hey everyone 

i got 2007 Mack chn613  which came with Mack transmission but I jst swapped it with Eaton transmission everything went smooth but now when I drive it the rpm is very high can’t go no faster than 40 mph what should I do?

Put a Mack transmission back in.

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Put a Mack back in, best thing he ever did was take the Mack out, just needs to find out what he messed up, maybe a underdrive now he is in direct, or .83  and had a Mack 5/6 speed never said what trans he took out, could be running 5. something ratio and a Fuller with direct or ? would give him no roadspeed.

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