I have turned a 91 Sunbird into a mini stock racecar. No modifications are allowed. So its stock. I'm having an issue in the transmission. When I am in drive, it shifts through 1 and 2 just fine, but right about 60-65 MPH when it shifts into 3, I can feel the shift and then the engine starts breaking up almost like it hitting the rev limiter. The tranny is the original factory transmission with over 100k miles on it. Just curious if it could be anything but a blown transmission.
Thanks!
-Mark
Thanks!
-Mark