I own a 2005 Dodge 3500 Cummins with a 6Spd manual, I dont like ATF for transmission fluid mostly because there are no EP additives and a lot less AW additives compared to regular tried and true gear oil. I was thinking of making my own fluid by mixing two different fluids to provide a better oil. I am looking for advice on the best fluid combo, how about 2quarts of RL light shockproof gear oil and 4quarts RL C+ ATF? Maybe 2quarts light shockproof and MLT and C+ ATF? IMPUT?!