Brother I had a similar problem with my XLI. But it was when I use to fully release the clutch. I consulted one local mechanic he told me that clutch bearing is worn out and needs to be replaced. Then I consulted this forum, different theories were postulated. But when I showed it to Toyota dealer , it was only clutch lever lubrication problem which was due to Car Wash. He greased the lever and problem was solved. Hope you also don't have some big problem.