I have bought a 2008 seirra ext/cab 4wd, worked great for the first 2 months now having trouble with it shifting from 1st to 2nd(seems to be slipping revs up to 3,000rpm and also from 2nd to 3rd) any suggestions? The tranny fluid seems to be a brownish red the truck has 85,000 kms on it, fluid is up good.
