so its been doing it for a couple weeks now, just havent thought much about it, but when driving for at least 20min along a main road using the higher ratio gears, the shift leaver gets more than a tad warm. the cover on the shift arm has slid down a little, exposing an inch of the metal arm and this gets quite warm. enough to make you wince. there seems to be a bit of heat floating around the cab from the centre piece between seats too. anyone had this before? any ideas what it is? i had the mechanic do oil checks last time it had its big service, not even 10,000km ago.