I am reviving a 1972 TR6 from a long 15 year storage. Had to replace all things brake related and while there replaced the suspension bushings that were obviously past their useful life. Finally getting the car moving, there is a loud chirp or squeak while accelerating and going uphill. It is loud and sounds as if it is in tempo with speed not engine revs. Anyone recognize this noise and its cause? It is coming from the transmission or further back.