[ZED_not_zee]

ahh yes this is typical the fluid is warn down.. also the shifter cables where and sttretch a litlle making it a little bit harder when the fluid is cold sludge...

Quick fixes:

do an adjustment on your cable linkages,, the white one is usally the culprate...

let the car warm up and drive it in third gear down your street instead of going to fourth this will keep the RPM's up in the tranny and warm things up

Also do a quick spot check on the tranny to see if there is anything in the way of the linkage that expands when warm and frees things up.. I used to have an AEM CAI and it got in the way of the linkage on the tranny

If you flush:

use GM syncro mesh... it works well in almost any manual is thiner and won't gum up as much when cold...

Cheers

AL