the TCU has gone into fail safe
so you should have third and reverse
you may be looking at replacing the tcu
check the auto oil level
then the colour (bright red )
then the fuses
if both are ok then the problem is electrical
pick up a second tcu from a wrecker and try that
Press and hold the 'UP' arrow on the speed set control and move the ignition key from 'Lock' to the 'On' position.
I had a 2002 magna and i got it to about 145mph.
There is not a way to switch off the speed alarm in a Mitsubishi by yourself. You can take the Mitsubishi to a dealership and have them scan it for you.
speed sensor location Mitsubishi montero 94 ls, 3.0
The 2009 Mitsubishi Lancer has a 5-speed manual.
The 2010 Mitsubishi Lancer has a 5-speed manual.
The 2003 Mitsubishi Lancer has a 5-speed manual.
The 2005 Mitsubishi Outlander has a 5-speed manual.
The 2014 Mitsubishi Lancer has a 5-speed manual.
The 2011 Mitsubishi Lancer has a 5-speed manual.
The 2004 Mitsubishi Lancer has a 5-speed manual.
The 2006 Mitsubishi Outlander has a 5-speed manual.