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

31Tudor · 08-18-2020, 02:54 PM

I run 3:54 in two cars and it seems to give about 6-7 MPH more with the same RPM. You will need to change the speedometer drive gear in the cap on the torque tube. All the parts houses have them listed.

08-18-2020, 02:54 PM	#3
31Tudor Senior Member Join Date: May 2010 Location: North Carolina Posts: 611	Re: 3.78 vs 3.54 rear end and speedometer/miles I run 3:54 in two cars and it seems to give about 6-7 MPH more with the same RPM. You will need to change the speedometer drive gear in the cap on the torque tube. All the parts houses have them listed.