Herschel Posted July 1, 2020 Share Posted July 1, 2020 Waasup group, I need some help finding out why my 93 Mack rd690s Looses power going up a hill, some people say it’s the fuel injectors... also I’m curious to know if getting lowers gear ratios (4.17-4.62) make it better going up on hills. It also has a t2070 7sp extended what would be a good tranny. I live in Ga and is a lot of up and down Quote Link to comment Share on other sites More sharing options...
OldRedMack Posted July 1, 2020 Share Posted July 1, 2020 What engine? Em7 300? Quote Link to comment Share on other sites More sharing options...
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