Different tyres sizes?????

[JonbmwX5]

Hi guys, i have just realise after all this time i have been running my x5 on two different size tyres

the two at the front are different to the two at the back. i have 295 30 22 and 285 35 22. Im worried now that it might have damaged the trans, do i need to replace two asap or is this ok untill i get paid (a few weeks). A friend says two need to be replaced asap as it will break the transmission. Another said it should be fine as it a 4x4 and they supply different power to different wheels.

i did a google search and it says different things about "the rolling radius would be different"

i dont really get the rolling radius thing, does 5mm make that much difference, are they ment to be different (like race cars)

i would be very gratefull of any advice, many thanks kind regards Jon