REAR AXEL ASSY UPGRADE REQUIRED

The picture above is of a MOPAR 8 ¾ inch Model 489 differential and carrier assembly with a sure grip unit and 3.23 ratio gears.

Our Charger has a Model 741 differential and carrier unit in it’s 8 ¾ ” rear axel assembly. Given the horsepower we plan for this vehicle we will upgrade to a Model 489 with a sure grip unit and 3.23 ratio gears.

Work resumed on the front suspension with the intention of swapping out the lower ball joints. This effort was cut short when it was discovered the previously purchased front end rebuild kit contained two driver side lower ball joints instead of one for each side. The company (Performance Suspension Components located in Phoenix, AZ. -  Web address: http://www.performancesuspension.com/) that sold the kit was contacted. They are sending the needed part plus a postage paid box to return the other one in. Their quality control needs improvement but their customer service is excellent.