Brian a buddy and I doubled up at Bowling Green Ten Tucks race last march he had freshened his tranny and his tranny guy (big name guy) told him to use this very same stuff. After 1 passes it felt like tranny was slipping, he felt and I did also. We pulled the dipstick and it was all foam so I asked him what he was using he told me. Took it about 20 passes before it finally was time to change it back to what he was using before and it worked fine. Just my 2 cents on this fluid.