Hi I know this is kind of a hard question to ask but I have a 91 Firebird with a 305 tbi and a T-5 trans. What gear ratios could be in this and how do I find out the easy way which one mine is? Thanks for your time guys, Ron.

 

We can tell you what probably came in it, if it has the standard one that went with that package; but there's no guarantee that's what's really in it.

Most of those came with 3.08s. But the only way to know for sure what's in yours, today, is to take off the cover and look, maybe while you're changing the fluid that probably needs it.