My car's trans is offically fried. It is a major effort to get it into any gear. I'm taking to the dealer on Mon. I have changed the trans lube to Redline D4. Should I drain the Redline and put the stock (whatever it is?) trans oil back in. Hate to waste the d4, but dealer saying "no repair you have modified your trans" kinda scares me. Need some advice. Thanks
jason
jason