I bought my old '91 F-150 several years ago at near scrap iron price due to several annoying problems the greatest of which was that overdrive could not be used due to the lock up clutch sticking. I was pleased when changing the fluid and adding Trans-Medic quickly resolved that problem but now, a few years and 20,000+/- miles later the transmission developed a shudder when pulling away from a stop and it worsened significantly in just a week or so. Yesterday I dropped the pan, drained the torque converter, replaced the filter and refilled with Mercon II. Today the shudder appeared to have worsened and driving home I was considering whether to sell the truck for scrap or get the E4OD rebuilt at double the price that I paid for the truck. There was an Advance store ahead so I pulled in thinking I would try Trans-Medic again but noticed this product
and thought what the heck and bought it and squeezed it into the dip stick tube in the parking lot like any good redneck. In the 2 miles of stop and go traffic home the shudder did actually disappear. I tried to make it shudder in the final 1/2 mile of driving when there was no traffic to interfere with my stopping and pulling away with a heavy foot. So far I’m amazed. Hopefully I won’t soon be diappointed.