Alot of times if it goes into limp mode that is when the van will not run very ffast or useually come past 2nd gear it just needs a little fluid the transmission has a flat top dipstick with a clip on front just place a smaller flat head screw driver in the slot closest to you and pull it gently toward you and it will come right out check it running at operating temperater but when putting the dipstick back in turn it 180 degrees so it will not lock and pull out and check the3 level and slowly add fluid try not to overfill and wait 2 minuetes or so and add av little more untill full the replace the dipstick where it will lock and usually thats all it is to it but you need to find the leek and repair it 1 minute ago by todd dease