I replaced all the tranny fluid with some GM syncromesh and love the feel. My question is when I original bought 3 quarts from GM they gave me syncromesh with friction modifier. I had to buy 1 more quart today because it was still low, well the same guy this time gave me regular syncromesh (doesn't say friction modifier on bottle and had different part #) and before I realized it was different I had already put it in. Will this damage the tranny any with different fluids. I don't think it will but am curious as to what others thought.
