I guess I would double-check the fluid level first.
Do it with the transmission in PARK, engine running, warmed up, and after first placing the shift lever in all gears long enough to allow each gear to engage.
Also, be sure the car is on level ground.
Do not check the fluid level if the car was just run hard, or for an extended period at high speed.
DId you do the MerconV install yourself ? The Shop manual calls for 13.6 qts.