I have exactly the same set up as you. There is a green 4X light on the dash when the button is pushed. your bulb may just be burned out
Same trans too. I have no problem down shifting from second to first and just use the 90 wt they sell at the bomba in Cobano (bulk) I do see the odd 151 for sale on Market place.
Same trans too. I have no problem down shifting from second to first and just use the 90 wt they sell at the bomba in Cobano (bulk) I do see the odd 151 for sale on Market place.