so when in drive with any kind of load on my truck ( sitting at 2500 RPM with brakes applied and slowly moving) there is a bad shudder!, could this be my torque converter? or differential? or ........ please help! No i was not doing a brake stand just road testing

 

sounds like TQ or engine misfire.

 

deffinatly not a misfire!!! no codes coming up!....

 

no codes does not mean no misfire. it could be very slight but i dunno.

 

All it takes is one or more weak cops.

 

i know theres no missfire its not a missfire kind of shudder it feels like gears its not random at all its a constant