Auto Box

I have a 95 r19 alize with the ad4 auto which is faulty. The transmission light is on and the car is stuck in 3rd gear no matter if you selct 1,2,3,d reverse works fine. To reset this once the car is warm I stop turn it off back on and all fixed.
Upon further investigation i found the final drive all was low (very low) i topped this up and after driving 100k's or so most of it was in the engine bay. Does anyone know how to replace this seal???:banghead:

I know this wasn't your question... but do you know where the gear box ATF level dip stick is? I have a four speed as well, and when I looked where I thought it was, near the air filter, I can see the tube going down into the box, but it's just a rubber bung instead of a dip stick! Cheers, Nick.