mook99ta

iTrader: (3)

I found the WS9 RPO code on my 99 Trans Am and did some searching but couldn't find any concrete answers. All I could find is WS9-conversion/Formula. Does this mean my TA started as a formula and was converted to a TA or it is a formula?

redbird555

iTrader: (14)

Yes it means your ta was a formula all ta's like ss' start life out as plain formulas or z28's then they are converted into the latter. I think y82 mayb the option code for the trans am??? Not positive though.
Dan-

eseibel67

iTrader: (10)

All TA's and Formula's have the WS9 RPO.

"Formula conversion" means that it had been upgraded (engine, trans, brakes, etc.) from a V6 model.

Y84 makes the Formula a Trans Am.

LS1W66

WS9 just means the car is a V8 Firebird. W66, Y82 and Y84 designate the Model.
WS9 + W66 = Formula
WS9 + Y82 = Trans Am
WS9 + Y84 = Trans Am Convertible

mook99ta

iTrader: (3)

Thanks