1st i tried just driving AT for a race then i tried restoring default settings in profiler then test, that fixed the paddles but still couldnt use the gate so i had to drive Semi-Auto for a race then the forward gears started to half:censored: work, finally unbolted my wheel and unplug/replug all wires then all gears worked forward and reverse...i wonder why all that only affected GT5 and GT6 but not the other games?
As I noted earlier, if a connection becomes unstable or intermittent, it can result in the condition you experienced, due to a "confused" state of the values it's supposed to present to the game. When you encounter it again, (which you will likely do at some point unless you replace all of the stock connectors with locking connectors, try re-seating the connectors, and nine times out of ten (or hopefully ten out of ten) the problem will vanish. I experience similar problems from time to time with my DFGT when the foot pedal connector loosens.
The problem is in large part (if the G27's DB9 connectors are like the one used on the DFGT), due to the fact that Logitech left out the normal connector lock-downs on each side of the connector for "ease of transportability". Time and the bouncing about of your wheel unit during some hard racing can slowly unloosed the connectors over time.
Hints: Some creative application of stiff foam behind the connectors as "soft stops" for the connector bodies might help that, as would modifying the G27 body to include the screw lockdown points normally found on each side of DB9 connector or replacing them altogether with locking connectors (although...
modding the G27 isn't something I'd recommend unless you're saavy with a soldering iron and device modifications.). EDIT: oh, you can also consider tying down the cabling so that accidental tugs don't compromise the connectors, even if it seems counter-intuitive because the connectors are facing "the other way"
Also, get some "wire drier" from an auto parts store and apply to the connectors to reduce any issues with corrosion, if you happen to live in a high humidity location. Although in my estimation, it's far less likely the culprit, contact corrosion
can result in an identical situation and though less likely, it's not an unreasonable thing to consider as well..