O/D shudder on '87 2.9 A4LD

[Rev]

'87 Ranger 2.9 4x4 Automatic A4LD

I'm experiencing a new shudder when the tranny shifts into O/D. It goes away when I take my foot off the gas and isn't apparent in other gears. Sometimes it gets so bad that the transmission downshifts, smooths out, then reingages O/D.

Fluid levels are fine and had the tranny drained and fluid replaced 3k miles ago (after replacing bell housing due to previous owner removing seal with screwdriver).

Any thoughts?

 

[Bruce]

Sounds more like converter shudder to me..while driving down the road lightly apply brake pedal which i believe will unlock the converter and see if it smooths out. Either that or you gots a missfire in engine under a load.