Thanks guys, I have a leak on a 350 turbo transmission. Not sure if the pan gasket or the seal on the shifter shaft. The fluid and filter need to be changed anyway so just was wondering about different brands because the prices are all over the place.. I found valvolene at wallyworld, for $13.99 a gallon. That was 8 dollars cheaper than at local flaps for a gallon of stp transmission fluid.