I wasn't sure but i wanted to change my gear oil and tranny oil to possibly RoyalPurpal or somthing that is nearly as good. My truck has about 127,000 on it and wasn't sure if this would be safe for the truck or should i just stick to the regular stuff? I know the diff hasn't been drained and filled but the tranny was done about a year ago and i wanted to do it befor winter of this year. So please any and all information is appreciated.
ThankYou