Hi,

That's right below where the dipstick tube is located. Other members have suggested cleaning the entire area of the transmission, i.e. brake clean, then with it dry sprinkle baby powder. The powder will show the fluid's path.

I would check the o-ring on the dipstick tube, cracks on the end dipstick tube, etc. If it looks good, put a fair amount of gasket RTV around the o-ring, put the tube back in and smear the RTV down around the tube where it meets the case to seal it.

Mike.