[MoparG]

It's also possible that all the press prototype pre-production cars had no DSA code rear. Since job one isn't until April 14th, we shall see. I'd like to know where the broadcast codes are for the equipment on a car. Are they on the trunk lid? It's a sure bet that all those pre-production cars will be crushed too.

The difference between anti spin and limited slip is nothing.

There can be a difference between limited slip and locking-type differential but often they are spoken in the same breath. For example the Cadillac STS brouchures mention the limited slip option in some sections and under axle headings they call them a locking axle.

Sure Grip is just a marketing term used by the former Chrysler Corporation which ceased to exist on November 1998 when Daimler AG merged with it.

To my knowledge, they don't use this term anymore but may be more suited to the Dodge RAMs, Dakotas, Durangos, Nitros, Libertys, Aspens, Commanders, Grand Cherokees and Wranglers which often use limited slip Dana 44 (9.125 inch) and Dana 60 (9.75 inch) live axle rear ends.

To compare, Ford calls their traditional limited slips TRAK-LOK. Particularly, the Mustang uses a 8.8 inch beast.

GM (Chevrolet particularly) uses Posi Traction for a marketing term.

AMC called it Twin Grip even though they probably used a mix of Sure Grips and Posi Tractions.

The problem with the limited slip rears is that the clutch packs tend to wear out after heavy use usually in 10 years. Even after steady lubrication schedule adherence, they can fail. This doesn't mean that they cause the car not to run, but often don't hook up and act as an open axle non-locking unit.

My 1978 Dodge Monaco pursuit vehicle's 9.125 inch Dana 44 rear (the cover looks like a stop sign) is still in awesome condition. The car can slide sideways in the dry with no hesitation. Mighty Mopar indeed.

Most rear wheel drive cars optioned in San Francisco before the days of traction control had to have limited slip; good luck going up those hills in the rain. Your left wheel will spin up endlessly and is very embarassing. Today, with traction control and a non-locking rear, what would happen going up that hill is brake pulsation and throttle let up usually in the form of engine retardation and you better have enough fuel and the reccomended octane when this happens or the knock can cause fatal detonation to the pistons.