Thanks, I had kind of figured to get 15 quarts for the "just in case" clause that always happens. I ain't starting no crap, but with the very, very sensitive 4R70W trans, the only thing proven to work to get rid of the shudder problem is three things...use only labled Mercon V ATF's (Castrol or Motorcraft), install a transmission cooler and change the ATF at least every 30K miles. Everyone over at F150.com and all the other F150 forums that tried an "approved" multi-use fluid has not had any luck. Now, they will tell you they have BUT they had to add some LC or some other modifyier. On the Ford trucks and this company called factorytech, it is made up of former Ford transmission workers that retired or quit, and went into business making a better Ford tranny. Anyway from all their rebuilding, they discovered that instead of having to intall a shift kit or a new valve body, they can get the same kind of results with a separator plate. These transmissions are notorious for having a long shift time which eventually eats clutches and are prone to premature failure. Not unlike the 6th generation Hondas that have had metallurgy problems, the clutches and the 1-2 accumulators fail.