The tranny in the 93 Taurus has 190k miles on it, and I've used Lubegard red in the last two or three fluid changes in order to dampen the 'torque converter shudder' (?). The Mercon ATF has been whatever the shops use,; Pennzoil, Valvoline, etc.
This last time I put half a can of Seafoam 'Trans Tune' in, ran it for a few hundred miles, decided to try changing the fluid myself, and to also try out the Greased Lightning stuff. I bought 15 qts of Havoline Mercon and used a slightly modified 'Amsoil flush'. I looked at the tranny cooling lines, unscrewed the one going into the radiator (not the one exiting the cooling lines), put on a few ft of 5/16 clear line, placed the end in a gallon milk jug (what I need to use for recycling), asked my wife to turn on the warm but not hot car, and kept my fingers crossed hoping that I had picked the right line. I had, and when the jug had what looked like 3 qts (next time I'll mark a 3qt line) I had her cut the engine. I replaced the jug with another empty milk jug, added 3 qts of ATF, and had her start it again. It went along without a hitch, and I had her cut the engine a bit late on the last jug, hoping for enough room for the additive. It worked out well as I ended up with 1 unopened qt, all of the additive in, and just slightly over the full mark. I probably won't pay anyone $100 to do a flush anymore.
The additive had the claims of smoother shifts, much reduced shudder and slippage, and so far it works as advertised, providing noticeably better performance than Lubegard red. I'll be interested to see how it holds up.
This last time I put half a can of Seafoam 'Trans Tune' in, ran it for a few hundred miles, decided to try changing the fluid myself, and to also try out the Greased Lightning stuff. I bought 15 qts of Havoline Mercon and used a slightly modified 'Amsoil flush'. I looked at the tranny cooling lines, unscrewed the one going into the radiator (not the one exiting the cooling lines), put on a few ft of 5/16 clear line, placed the end in a gallon milk jug (what I need to use for recycling), asked my wife to turn on the warm but not hot car, and kept my fingers crossed hoping that I had picked the right line. I had, and when the jug had what looked like 3 qts (next time I'll mark a 3qt line) I had her cut the engine. I replaced the jug with another empty milk jug, added 3 qts of ATF, and had her start it again. It went along without a hitch, and I had her cut the engine a bit late on the last jug, hoping for enough room for the additive. It worked out well as I ended up with 1 unopened qt, all of the additive in, and just slightly over the full mark. I probably won't pay anyone $100 to do a flush anymore.
The additive had the claims of smoother shifts, much reduced shudder and slippage, and so far it works as advertised, providing noticeably better performance than Lubegard red. I'll be interested to see how it holds up.