We have a 2008 RAV4 that has been making a weird rattle clunk noise while going uphill lately. The noise is very hard to recreate or get to happen. It seems like it only happens when the engine is more loaded than usual.
I first thought exhaust leak but I can’t find one crawling around under the car.
I also wondered if it could somehow be related to the awd/ 4wd system. My understanding is that it is primarily fwd unless the computer decides it needs to be 4wd then it switches automatically. There is some oilon the rear differential. I can not get it to make the noise anymore frequently when the lock button is pushed than not however.
I am stumped! Do any of you have any ideas?