So I'm not sure if this is where I should post this, but anyway. I just go a tranny flush on my 84 camaro, and its still running a little weird. When I shift the ca into drive it pulls, and then when the car is going betweem 25-35 RPM and i slow down the exhaust starts crackling. The car also has shut off a couple times now after going up a hill. It started the made a couple "click" sound and shut off. I am not sure what to do here.

 

Could be the TCC valve sticking the problem with a flush is particulary on high milage cars it ends to dislodge silt and trash that has deposited over time putting it in places that it can cause troubles. First thing I would try is changing the TCC solenoid as it may have become blocked with trash from the flush