hi im hoping someone can help me figure out whats wrong with 4l80, i just did a lq9 and 4l80 swap in my 1988 caprice but when car is running there a sqeaking/clunking noise coming from the torque converter area of the transmission. thanks in advance for the help

 

Have to looked for a cracked flex plate or loose torque converter bolts?

 

flexplate is brand new and i just check torque converter bolts and they are all tight. i have a video of the noise but im not sure how to post it

 

What is the history of the 80? Did you previously hear it/seen it work?

 

The One-Way Roller-Clutch for the Stator could be making noise...
or even the Lock-Up Clutch dampening Springs could be making noise.

What is the model of the Torque-Converter?

 

i did not see or hear it before i got it, it came with the lq9 i got. i know the pump is working as it should and goes into every gear. the noise and shaking is the only issue with the trans. i haven't pulled the pan and took a look to see if there is any metal shavings/chucks in the fluid.

 

do you think the torque converter is the problem?

im not sure what model it is but i do know its a old style 4l80 with the two cooler inlet and outlet close to eachother

 

this is the sound my trans is making doesnt seem to go away when put in gear. also noise seem to go up witn rmp. sorry running open headers at the moment.