Everytime I turn the air-con on in the silver one, gear changes are alot harder to controll and end up cluncky. The car has 125,000kms on it and came from country NSW (so the air-con must've been used a lot).

I'm thinking the recent hotter weather contributing to the power loss, but it seems to be much harder to keep smooth than a while back.

Any tips or knoledge would be great.