I am receiving a SEVERE shake (entire cab from steering wheel to the pedals, seat, manual gear shifter etc.) During certain speeds regardless of gear. Currently it is occuring between approx 35 and 44 MPH, and previously it was happening between 30 and 50 MPH. I also receive a much more suttle vibration around 70 MPH. After searching the internet I have read alot about the driveline or U joints being the problem. Would this be my case? And whatever you believe my problem is would you be able to give me a very rough estimate on price (parts and how many hours of labor) thank you for your help.