To say this product is amazing would be an understatment. I was towing a trailer up I-80 heading to central PA. The started to slow down and the RPM's started to rise. I puled the car over to the side of I-80 and at that point the car wouldn't move an inch further. I opened the hood and a flume of smoke came streaming up from the transmission, I checked the fluid level at the start and it was full nowit is bearly showing on the stick. I went in my trunk and remembered buying the Lucas product for transmission problems and intended on having it serviced along with this additive be cause it was acting weird and has 115000 miles on it. To make the story short I poured the contents of the bottle in and to my amazment the car was able to move. I continued on and got off at the next exit to get fuel and check everything over. I made the full round trip and that was over 700 miles. The transmission now shifts perfectly and the overdrive doesn't shutter anymore. THANK YOU LUCAS