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Might be getting a CH 427
in Modern Mack Truck General Discussion
Posted
I have a question…I have a 1999 ch 427 it has an Eaton 10 speed and 4.17 rears…can I change the 10 speed to a 13 speed having 4.17 rears? Will I see improved speed without having rpm so high?? 🤷🏽♂️🤷🏽♂️