Is this Sierra a 1500, or 2500? It will make a difference in the transmission. I am under the assumption it is a 1500, with a 4L60E trans. What was the condition of the replacement pump, by that I mean, was it a complete bolt on, or was there any assembly necessary. Even if it was installed dry, I don't believe it would cavitate and not eventually pull fluid from the pan and build pressure. Were all pump gaskets and seals in place? Keep in mind, you only added 4 quarts. In either trans, fluid capacity for pan removal is 5-8 quarts, and complete overhaul 11-13.5 quarts. You removed pan, and also replaced converter(which holds approx 5 or more quarts itself), the fluid sloshing you may be hearing is cavitation from existing low fluid still. You did not specify, was this the previous condition before any transmission repairs were made?
Friday, March 12th, 2010 AT 10:31 PM