You guys can hate on Lucas oil but they do make
SOME products that work... Yes they may have snake oils but I have a testimonial on a success for the transmission fix.
lucasoil.com
I managed to get over 60,000 additional miles out of a 1998 Chrysler T&C transmission once it started to slip with the Lucas transmission fix. Yes I tried a regular fluid and filter change first but it would still slip and shutter. On a hunch I added 1 quart of transmission fix to the ATF fluid and it got significantly better. I kept this recipe for the vehicle for about 3 years and changed the fluid every ~20,000 miles. It was significantly cheaper than a transmission rebuild.
*** I understand that Chrysler's need to have the specific ATF and that fluid was used in all changes.
Todd