Hello and Newbie with a question

[cfd2bc]

Hello everyone. My son has a 1999 Firebird with the 3.8 and auto. He is wanting it to be a little peppier. I tried searching the threads about switching the rear to a 3.73, but couldn't really find anything on it. If I read correctly, his car has a 3.08 in it now correct? Would this be a worthwhile swap? Would there be any issues with it? Would this really kill the top end? It is a daily driver.

Thanks in advance for your help,

Jeff

 

[melsg5]

it's not ideal for a daily driver, the 3:08 is an economy axle

 

[cfd2bc]

Melsg5, Thanks for the reply. I understand that the 3.08 is an economy axle. What would be a happy middle for this car? I run a 3.73 in my 07 Mustang GT and it did not really affect the drivability of it. It did start out with a 3.31 though. Would the 3.42 fit the bill better?

 

[melsg5]

that would be a good compromise between some economy and some what more acceleration. I went from a 3.08 to a 3.55 and it really woke the car up.

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[5spdgirl]

I have a 3.8, been doing a lot of research on it, and perhaps consider putting a supercharger in it, can also gain a lot of hp from changing the head gaskets, intake, exhaust...not saying I'm "right" just an idea

 

[cfd2bc]

We will look into the 3.55's. Thanks for the ideas 5spdgirl. He has plenty of those, including everything you mentioned