Yes it is...Cal Hartline installed it. He told me it locked up sometimes, but when it does just depress the brake. He said it might be my computer or the chip he gave me. Other than that the tranny is great, I love it. I just raced a mean looking 5.0, he didnt stand a chance. He wanted to know if I had a 350, I told him No, just a 6. Thanx alot