Glad you posted this because, while someone here helped me identify the gear ratio by the code, a 3.90, but the part that clinched it was when the statement was made that "some GMCs got the Chevy rear end". That's a great description of mine! Now if I can get that pesky spline count and find out what differential's in it I'll be happy!
Last edited by Doug5558; 10/29/2010 2:32 AM.
