I have an 89 formula WS6 305tbi AT. I think it has the 700r4. steel driveshaft.

The question i am asking is:
Does my car have posi/limited slip, or regular open end?

I have noticed that a few weeks ago i would powerbrake it for some rice burners to enjoy, and it would lay a mean a$$ posi, but the last couple times, i have been laying nice dark one-leggers... nice, but disappointing when i know it used to rip posi shots. Can anyone tell me what is up with that. Thanks!!!

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'89 formula, 305 tbi, red, t-tops, all-stock except for edelbrock open element and k&n 3"filter. exc cond.

 

Check for the RPO code G80, if you have that you have POSI, if not it's open, should be in your center console.

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1989 Trans Am GTA, L98 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27, Dynomax muffler, K&N
1992 Camaro RS, LO3 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel, K&N - Sold

Honda engines ROCK, I have one on my lawn mower but I still have to push it.

 

Yea! you shot your Possi with those nice burn
outs one time to many.

[This message has been edited by Z28DJP1987 (edited September 21, 2001).]

 

Most TBI's are non-posi. The G80 code will tell you for sure.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

I am under the same impression as Kevin; that most TBI cars are "peg legs". Finding a G80 code will confirm. Look at your SPID.

 

hey thanks for the help... I checked and there is no G80 code on my sticker. But why then is it able (or USED to be able) to rip a posi shot on newer and clean asphalt? There are no signs of tampering on the rear axle/diff, and the person i bought it from never put any mods on it, so i am pretty sure nobody did nothing to it. also, i can buy a spool for about $100... Is it worth it, and will i blow it up doiong what i do?