Transmission (auto) stops shifting; dash lights go out
 

This seems like an odd problem...at least to me.
2008 Mazda 6; I4; 2.3; 5 spd OD

Put the car in drive and off you go; sometime later the gear indicator on the dash will go out (you can no longer see what gear you are in or even if you're in D, N, R, etc; all other dash indicators are normal), and the transmission will either fail to shift up or down, or it will shift down. A slight wiggle on the gear knob sometimes corrects the problem, or I can move the shift lever over to the manual position and back and that fixes the problem.

I checked the transmission fluid and it seems to be the right color and level (I don't think fluid level has anything to do with dash indicators, but it was easy to check). I then thought it may be a gear shift selector "module" problem or is it maybe a cable leading to the gear shift selector that needs to be tightened?


Thank you for any advice.