I agree with Max, if it's near the rear differential, it won't have anything to do with the automatic transmission. If you're close to a larger city, hunt for a shop that can repair hydraulic hose with swaged fittings & just fix the existing lines. I used to live in Spain for a few years but that was long ago & my Spannish is rusty. Ask for something along the lines of: "reparar tubo hidrolico". In a pinch, you could do a bandaid fix just to get you back home by buying a length of air compressor hose, it's usually rated for 300 psi & will have oil resistance for the short term. Using 2 or 3 hose clamps at each end, & then have it fixed properly once back home. What part of Spain?