Well made the checks and double checks on everything and was able to drop my car and take it out for the first time in almost a month. I got a HMS transmission with quaiffe, spec stage 1 clutch, spec aluminum flywheel, ford TOB and slave cylinder, and new axles. I filled up the tranny with 2.something quarts of the ford $52 crap and now when I first take my car out, under deceleration and deceleration only, my differential is making the same grinding noise it was when my ford one was going out. Is this something that will be going away or is this something to worry about, cause with $3,500 in parts alone, I don't think there should be anything going wrong. Please help