TCC shudder

i just put a fuddle 3400 stall torque converter in the z28 last week, and now i have a damn shudder in drive(3rd). is that normal until it’s broken in or did i get a fubarred converter? it’s not there when i’m hard on the throttle, or when i brake stall it a little bit while moving so i’m pretty sure this is my problem. after all the problems i had with this thing i’m gonna be pissed if i have to tear it out, send it back and wait forever for it to get repaired and sent back.

fuddle =poop

heard a lot of problems from them lately

i drove it tonight and it wasn’t real bad. maybe it still has air in it that needs worked out or something? i’ve only driven it about 20-30 miles since it was put in.