Gage cluster and losing drive gears

So my Gage's would cut out driving down the road and I
would loose my drive gears unless manually shifted! Now
if it's a fix then good but on mine I pulled out the fuse
block upper in the dash by the door and blew all the dirt
and dust free in the bottom left corner was two black
relays that when I touched I would regain power when I
pulled them the were black on the terminals I sanded the
to the copper and put everything back together and have
not had that issue ever since and that was about eight
months ago please let me know directly if this helps fix
your anyone's issue I would like to digg a little deeper on
some alternative fixes