Just as stated in title, my car shudders a lot in first gear ONLY in first gear.

I'm not quite sure what it is, Timing is fine, everything else seems fine... no codes...

It only happens in first, all other gears are smooth. None of the gears slip they catch all catch fast even first, no grinds or pop-outs.

RPM Bounces up and down through the whole RPM range pretty much..

Any sort of ideas would help... thanks!