Here is a picture of Big G doing what he does best. This is actually the last Differential  Big G did at Westport Dodge! This particular Dakota had a broken Posi unit and was replaced by BigG under warranty. Here at Big G auto service we can overhaul, repair, replace or even change gear ratios or add posi units to vehicles that were never equipped with one.  Check our prices we are very competitive in this area and there are very few places that even offer this type of work. Big G offers a no whine guarantee! Which means you won't whine about the price and your differential won't whine either! Used posi units available for GM Ford and Dodge. Posi's installed for around $160 labor.  Gears set up for around $300 Labor!  Used posi's around $200 Complete bearing and seal replacement around $500 includes parts!