Nissan Titan rear differential problem fixFor anyone who has the Nissan Titan 2004-2007' with the M226 ( 32 spline Dana 44 ) rear differential. That axle has a tendency to get the axle vent plug clogged and it ruins the rear differential. The best and most economical replacement for that rear diff is the Eaton Detroit Truetrac helical gear limited slip differential part # 913A582 which is a part we stock. That unit is a performance aftermarket gear driven limited slip and is much less expensive than buying a whole new rear axle which is what the Nissan dealer may tell people they have to do.