Dodge 2014 SRT Viper Owner's Manual page 167

UNDERSTANDING YOUR INSTRUMENT PANEL 165
Tach. Peak Hold
When enabled, the Tach. Peak Hold function marks the
peak Revolutions Per Minute (RPM) on the tachometer
gauge for 3 seconds when the RPM is above 4000. Using
the UP and DOWN arrow switches on the left side of the
steering wheel, select the gauges icon from the menu on
4
the left side of the cluster (highlighted red is the active
menu item). Use the right arrow to enter the gauges setup
screen, and the up down arrows to select Tach Peak from
the menu of gauge options.
Tach. Peak Hold
Select up and down to toggle between "ON" and "OFF".