4R70W Trans shutter

[Godsday]

I have a 95 f150 5.0l auto 4R70W
Witch has a shutter at idle all the time.
I just bought the truck. So the fluid was a little dark so I pulled the pan and black like sut sitting in The bottom. Happened to see the TC had been changed because it was blue. Changed oil and lucas treatment. I still have the shutter. Put maybe 100 miles and at an idle for a very short time like 1 min the shutter stopped! As I started to drive again it started shuttering again.. any help would be helpful thank you!

 

[410Fortune]

To see if it is indeed a converter issue try adding some Lube Guard Dr. Tranny Shudder fix
It will at the very least make an improvment so you can decide where to go from here

 

[JK080]

The converter can only cause a shudder when the converter clutch is engaged somewhere around 30 to 40 depending on vehicle load.

If you have a shudder sitting still in gear at a idle its not a transmission problem, most likely some kind of engine issue.

The only thing converter related would be a out of balance converter, that only happens when they are rebuilt and not balanced properly during the converter rebuilding process. I have only seen this once or twice, ever.