If you are sure it is leaking from the down shift lever it is just a O-ring , remove the nut and lever and use a pick to remove the old O-ring , install new one , if it's the shifter shaft you have to remove the pan , the nut on the inside , and a small pin in the middle of the gasket area , use a small vice grip to remove it , you do not have to remove the valve body to do it , if the parts store does not list it use a 93 ford ranger with the A4LD , it is the same seal ,

great , glad you got it fixed , guess over the years they changed , mine had a O-ring in it , later Blaine