Clunking in the transmission
My T4R '04 Ltd 2wd does that a little bit, mostly when I am creeping along at 45mph and it wants to shift into OD. Reading these posts reminded me of the time I was out of grease cylinders for my grease gun, and used the only thing I had on hand for the CV joints in an old Isuzu 4wd Trooper.
I went into the bathroom, grabbed my jar of Vicks Vapo-rub, and filled my my greaser. Then I lubed her up and drove it all over Texas and New Mexico. Not only did the Vicks solve my CV joint problem, but I swear the machine could breathe better, too.