I was playing around with this very thing last night. Good to know that others are doing this if it does not get any better. Was taking it easy on it not knowing the extent of the potential issues.

Thank you everyone for the feedback so far. Mine sometimes sounds more like a grinding or slipping gears. Goes away just as everyone else describes in letting off the gas and feathing back in. This is only at speeds between 30-40 only as it tries to lockup. Maybe my direct drive is worse off than others. Really odd that mine did not make that noise prior but did not shift as firm. Now it shifts firmer but now grinds. Oh the joys of old cars. Going to drive it for a few days and make sure I do my best to have it fully engage without slipping and just get some miles on it. Will go through the pressure tests. I have done that for other trans before. One question for the throttle pressure and low brake top. Are most of you getting an old pan and modifying for testing purposes. Manual does not show picture but assume it just has through connections with the the NPT on the outside and hose connection into the port on the inside. Seems easy enough to make if you have an extra pan.

Mitch

Hello everyone. New member to the forum. Always been into the odd and orphan makes. Currently own 47 Willys pickup, 50 Hudson Pacemaker and a 75 Bricklin. Just picked up a 56 Pacard Executive.

Already found some great info here but wanted to explain my exact situation and get everyones take. Car had not been driven in many years. Prior owner had done some work at some point in getting road worthy. After first drive and since then when you came to a stop you would here some clunks. After reseach I believe this was the lockup unlocking. Other than that it shifted good and no other issues. The trans was a quart low and not knowing what the prior owner had filled it with thought it would be worth dropping pan inspecting and topping off with Type F which I see many use. After filling up took for test drive and shifted better than before. Half hour later when driving still shifting fine but when it tries to go into lockup will not fully engage and makes a moan / grinding noise. Mainly around 30-40 mph. If you feather the throttle you can get it past this point and then seems fine. At speed 90% of the time you can feel it is in lockup and working. I see many have switched to Trick Shift after this same issue and had good good luck. Just want to get any opions or experiences before I dump $50 in fluid to then fill with $80 in new fluid.

Thanks and look forwad to being on the forum