Currently I have a 95 TA with the LT1. Does anyone know what the stock HP is rated at and gearing in the rear end. I also have a "TRANSMISSION PERFORM" button and would like to know what it does! Looking to upgrade exhaust and intake. Currently have a 84 with a 383 stroker and a 88 with a 305 which is a discrace! If you would like to see I can post pics of all. So anyways I have kind of a passion for the F-body and am just looking for some info. Thanks,
Rick

 

If I'm not mistaken 95 was the split year that could have had either dual cats or single cats. If your car has 2 cats it was rated at 285 hp. If it has one cat it was rated at 275 hp. The majority of TA's and Z28's had 3.23 gear ration in the automatics, or 3.42 in a manual (thats it yours has the 150 mph speedometer). You can also tell the gear ratio from the RPO codes (located in the glove box):

GU2 - Axle, Rear 2.73 Ratio
GU4 - Axle, Rear 3.08 Ratio
GU5 - Axle, Rear 3.23 Ratio
GU6 - Axle, Rear 3.42 Ratio

The Performance Button was added to increase the speed or firmness of the shifting in automatic cars. Personally I don't think it really does all that much. But some people believe it does wonders.

As far as exhaust goes. Get a CAI (cold air induction). Either K&N or Moroso. Both are cheap and work wicked well. Then go with a good set of long tube headers or mid length if emissions is a concern for you and a cat back (GMMG or Corsa IMO). That should get ya started, and hopefully this helps some.

Jp

 

The only 95's that had dual cats were the A4 cars with CA emissions. All others have a single cat. And all 95's were rated at 275HP no matter how may cats they had.

 

I just want to clear up some bad info in this section...

Like said above 2 cats were for CA cars, and BHP ratings were all the same at 275... A4 cars had 2.73's stock and 3.23's with an upgraded performance package (and that ahad nothing to do with the speedo, but who gets a performance upgrade without upgrading tire's). The speedo upgrade was dependant on the tire selection the vehicle was made with. low speed rated tires had a 110 MPH speedo and all high rated came with the 155 MPH speedo. Like my car had the upgraded tires but not the performance package and I have the 155 MPH speedo... *** EDIT*** and if you read the literature from that year you see the tire upgrade is what mentions the speedo change...

Oh yeah to the comments about the button not doing much. There are actually different tables in the computer that change shift points, tcc lockup, and other things when that button is pushed, and it all depends on if you computer is stock or not if you feel the difference, a lot of tuners tune then to be the same when you get the computer tuned...

 

Hmph, I don't think I've ever seen an F-Body with a 110, only Bonne's and Grand Prix/Am

 

I drove a 95 Lt1 vert with a auto and it had a110mph speed....I think that was the weakest Lt I have ever been in....what a turd

 

found this online too:EDIT found this too this is actually what I was looking for:

 

Thanks for your help!!!!
-Rick