Originally Posted by OhioMopar
I have a 2019 with the 6.4 and 3.73 gears.
Do you have the 6-speed or 8-speed automatic transmission?
The transmission ratios are significantly different. And ofcourse the 8-speed has closer spacing for just the right RPM at MPH.

66RFE: 3.231, 1.837, 1.41, 1.00, 0.816, 0.625, ------, ----- Rev 4.44 (RAM 1500 65RFE 0.67 top gear)
8HP75: 4.710, 3.140, 2.10, 1.67, 1.290, 1.000, 0.84, 0.67 -Rev 3.06 (4WD)

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1