Re: Idle/random issues also
When you cleaned the throttle, it is possible your throttle position sensor didn't like it. Since you tap the throttle and it settles down, I think it might be time to replace the throttle position sensor. Not sure on the AC thing though. Having it on sometimes affects idle speed, but shouldn't affect the tranny, unless again it is the throttle position sensor affecting the shifting of the tranny. It does do that and a damaged sensor is probably the culprit there.
230 hp 4.3L Chevy
Built 4L60E with manual lockout
Atlas 4 speed
Griffin radiator
On board air
Warn 9.5ti on custom bumper
7.5" RE front and bastard pack rear on custom long arms
30 gal gas tank
lockers
And a bunch of other stuff
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