My LT1 won't start at this point. After I installed a new pressure plate this all happened. Not sure if its just coincidence. After I reinstalled the tranny and a new poly mount I took it for a ride. It ran mint for about an hour and two 10mph launches. After another 100mph pass It started to hesitate or miss for a second and then pull again while driving home. So I thought it was a rocker too tight or something. After checking the rockers I put it back together and drove it last night for about 10 minutes before I started to get a loud banging when under a load. So I brought it home and left it to look at this morning. I just went out to start it and it just cranks over and bangs A LOT. Could this be a spun bearing, rod knock, broken crank or is something binding with the tranny?

 

Is the noise coming from the tranny or engine?

 

im not sure

 

ttt.....anyone? help

 

Too vague. Your going to have to give more info on the noise and where it is coming from.

 

i cant really tell the car wont run more then a second.

 

Pull your plugs and check for damage and wetness after trying to start. If damaged, enough said. If wet, check compression.