I decided I really needed to get the 4.56s in and started getting info together for the job. Crawled under the truck and the tag on the front diff has D 27 A stamped on it. Does this mean I have a D27, if so is there any way to convert to a D35 and from what vehicles ? The rear is OK V313L, 31 spline, out of an FX4. Funny what we find when we check things out. Please comment !