1- Chrysler 8.75 Master Install Kit (Timken Bearings). 1- Chrysler 8.75 3.55 Ring & Pinion Set (Yukon Gear). Dodge chrysler 8.75 3.55 ring and pinion sure grip posi yukon gear pkg 489 case we recommend using standard 80/90wt (non-synthetic) oil with posi additive. Yukon Ring & Pinion sets give you the confidence of knowing youre running gears designed for the harshest of conditions.