4x4 TH350 Slow into gear

[hotrodmtodd]

Lets try this in the main forum. Posted in the Blazer section and didnt get a single response. Have a TH350 in my 72 Blazer that has been sitting for 2 years. It worked great up until I parked it. It is sporadically slow going into both drive and reverse. It will work perfect one time, the next time, I have to rev it up a little to get it to engage. Doesnt matter about cold, hot or otherwise. It is just random. Replaced the fluid, filter and gasket, some aluminum and steel in the pan. Added some Seafoam trans tune to try and flush it out a little. Could this be a modulator issue, or is this thing trying to tell me its toast? If it is, I am going to do a 3 or 4 speed manual swap, most likely since I have both set ups. Just curious if you guys have any opinions on this tranny, or which of the manual swaps would be the least time consuming. Thanks guys.