I was originally introduced to your product line by a fellow mechanic as truly a "mechanic-in-a-bottle"; and I thought; yeah, right. I had a 76 Ford LTD ex-rental car with about a quarter million miles on it and a slipping 1-2 upshift. Added 1qt of "Stop Slip",and drove it; it worked!! That car is still running and parked in Az. as our "airport-car". When I bought my baby-blazer as my mountain-driver over 2yrs ago with 155k on the original 700r4 trans in it, I changed the fluid and filter in it, added your product, and am now getting wheel-spin on demand, and 2nd gear rubber @7000 ft elevation!. I am an ASE certified parts specialist at the local NAPA store and a retired NHRA & NASCAR fabricator, line mechanic and custom car builder, so when I recommend a product line; people listen! I have personally tested all of your products that we stock with complete satisfaction, have never had a complaint from a customer, and intend to recommend to management that we expand our coverage! Do I sound happy; yes I am! Zed