90 LS40 RPM's move in bursts on acceleration
 

When I start off in first, (from a stop or whatever) and basically floor it, or any time the trans shifts down to first, on acceleration past the 2500 RPM mark, the needle moves up in bursts. It revs quickly, but it slows and speeds up at certain points.

Let's say from 2500 to 5000 rpm the needle moves in 100 rpm bursts. Hard to explain. Maybe I'll try making an animated gif of a line moving how the gauge moves.

Anyone have any clues?

Why would you floor it from a stand still????? Damn.... thats a quick way to kill a Lex!!!!!!!:eek: :eek: