The Ford Barn - View Single Post - 3.78 vs 3.54 rear end and speedometer/miles

Jack Shaft · 08-19-2020, 07:55 PM

I look at it from a different perspective 26%od with a 3.78 or a 3.54 at crusing speed of 62 mph? The 3.54 drops engine rpm down 130 from the 3.78..from 2130 to 2000 or so..better effciency,no lugging..

08-19-2020, 07:55 PM	#11
Jack Shaft BANNED Join Date: Dec 2019 Posts: 1,196	Re: 3.78 vs 3.54 rear end and speedometer/miles I look at it from a different perspective 26%od with a 3.78 or a 3.54 at crusing speed of 62 mph? The 3.54 drops engine rpm down 130 from the 3.78..from 2130 to 2000 or so..better effciency,no lugging..