My 1983 Toyota has a cluck noise every time you relise the cluch at medium to high speeds I can here a clunk at the rearish of the truck I dont know exacly where but I can here it better If I am in the back seat. PS I just changed the cluch.
Worn universal joint perhaps?
I can only think of the universal joint or loose bellhousing bolts. OK, transmission mount at the tailshaft.