what would cause my truck to shake when it is 4th or when the converter locks when the truck isnt warmed up? it also does it on the highway if a floor it at 70mph to speed up? could it be the tc, clutches or bands need adjusted? it has a 47re.

 

Sounds like TC shudder

Luke

 

thats what i was wondering. i didnt want to put a shift kit and billet single disc converter in it then have to pull it back out to put clutches in it. just hopeing someone else had this issue and would chime in.