I once removed the valve body socket on a Camry only reverse and last gear worked didn't matter if on l or 2 or d it would only run on last gear there was no pick in car....
forget it its never needed if you stick to one brand of oil and always change the filter and always change the oil and filter before the the kms are reached....
lsd oil usually does not come ready you have to mix a small bottle of clutch oil with the diff oil and then pump it at the differential...keep it at the required level or else you will be facing a good repair bill later on...
Yaris carries the nz series engine which is a vti engine so its a durable and a trusted efficient engine and regarding ac the older yaris has good cooling air condition system the newer ones ac are good as long as they are new later on when we get our hands on it we put the old model compressor and alter the pipes and wiring so it also runs smoothly...and for long drives its OK as long as you fine with the seats they are bit small...
To whom it may concern it really doesn't mean that you are not in you can join and it will make the difference..the guys if you like to come and enhance the atmosphere as passengers are most welcome