Hi, My TR6 is suffering from the the dreaded transmission knock when cruising at say 30 mph in top. There isn't any diff noise or whine. By holding the diff input flange and turning a rear hub there is definite angular movement between the diff output and input shaft. Also there is some play in the drive shafts, but how much of this is splines or UJ's is difficult to assess. However the diff play is easier to feel. Question: How much angular play should be expected/acceptible. If less than I