LUCAS tranny treatment is THICK; the same pump I used to pump in ATF fluid had a hard time; got most of it in, warmed up the container first to get it thinned a little; and made sure the tranny pan was HOT to; before I started it I let out a few quarts of ATF, ran the LUCAS in, then ATF thru pump after; I got HALF my GEARS back; still need tranny rebuild/replace but that STUFF does WORD!