Dazed and Confused
Join Date: May 2012
Location: Upstate New York
Re: How loud is your stock 350?
I'd have to hear it to say if it's normal or not, but having driven either an E250 or E350 for the last fifteen years, I will say that they drop out of overdrive fairly easily on hills, if that's what you're hearing. A lot of things can come into play, hear, first, is it 4 wheel drive? The added weight may cause it to downshift a little sooner. The rear differential, if it's geared low, can make a lot of noise as well. My personal truck can whine pretty good with 4.11's in the back.
Ever notice that there's so many high performance parts available for GM products?
Did you ever think that maybe they NEED them?