I heard that all 'ws6' cars had posi-rear ends.. is this true,, exactly What does the 'ws6' stand for ?? Were they just options you could order, or where they required when ordering the WS6 option,???...

It's a 4th gen Pontiac thing... Got this from www.ws6.com

WS6 Option - Ram Air Performance Package (Formula Coupe/Trans Am Coupe) Includes Ram Air induction system, specific tuned suspension, high polished 17-inch aluminum wheels, P275/40ZR17 speed-rated tires, dual oval high polished exhaust outlets. WS6 was the option code was available on both the Formula and the Trans AM. This option boosted power to 305 HP and 330 ft-lbs torque on the 96 and 97 models. In 1998 the WS6 boosted power to 320HP and 345 ft-lbs torque.

Sounds like the SS version of the TA and Formula cars...

mine is a 1991 formula.. 350 motor,, i thought the original ws6 cars was all about the suspension..?

ws6 is performance suspension, doesn't necessary mean that you have a posi. rpo code G80 means it is a posi, and then there is a code like GU2 which means 2.73 gears

IIRC, on 1st gen Firebird's the WS6 option was a suspension and handling package.