It may not happen at first because the EEC doesnt command TC lockup until the trans fluid is warmed up.
If you have switched to mercon V and still have TC shudder, you need to replace the TC. This is especially important to the 94/early 95 cars, as they had weaker TC's than the later ones. When the TC disintegrates it will turn the fluid as dark as burnt engine oil... and if you don't catch the TC before it starts to disintegrate, the tranny will fail soon after.
I've been there done that, and I've got the rebuild receipts to prove it.
96 Mustang GT 5spd. w/ 248A Option (GTS). Stock for now until I get the Roush on.
97 Thunderbird 4.6L LX /w Sport Package
24k B&M Cooler, 1" lowered, Steeda UD Pulleys, Dynomax cat-back, J-mod, 3.73's, PI intake, PI cams, 03 GT MAF/Tube, SCT tuned - Gone but not forgotten.
MAMN12 Drag Racing Team [email protected]
In need of updated times.