Steve, the question was about harsh trans. shifting from 3rd into 4th.Your reply was to adjust the T bar in the modulator.My problem was solved by making the same adjustment,but it did not solve the harsh thump from N to drive.The trans. shifts at the correct speeds but i can not solve this problem.Is there another adjustment [internally or externallu] for this problem?BTW the flex disks are in good condition and the RPM's are at 6000.