Justnsane2

Hi all,

New to the site and would like some help regarding changing my gears. I'm not as knowledgeable about the car specs as many people on this site (though I know a fair amount) so I'm open to whatever helpful tips you all may have. I have a 99' Formula Firebird Auto which should have a 2.73 gear ratio in it right now and am looking to switch to a 3.73 gear (max). I currently have a series 2 carrier in it and my mechanic advised me to switch to a series 3 carrier. When I searched around the site, however, I found forums that stated you can keep the series 2 carrier and just go with "thicker" gears - Saving time and $$$ which is always a plus. Is this true? Has anyone done this before and how'd it turn out? How does it sound? How long has it been that way? I found this part that SHOULD work? Please help! Thanks!

http://www.summitracing.com/parts/rmg-4900071/overview/

justin hover

Yes...go with series 2. I took my richmonds back after I read countless threads on how loud they whine. I went with motive series 2 and the master install kit. I had gu2 (2.73s) as well and swapped to the 3.73s. Really wakes the car up. No more 2nd gear lag. Feels like you gained 40hp and a second in the quarter. But a dyno and time cards will prove other wise.

FirstYrLS1Z

iTrader: (4)

that link is correct for a 3.73 gearset for a 2 series carrier.
it is a richmond gear and there are many that don't like richmond and there are some that do. I'm not gonna enter that debate.

Justnsane2

Thanks for the help! Really appreciate it! Looks like that's the route I'll go.

01ssreda4

iTrader: (96)

Motive GM75373x is what you want.

Justnsane2

Thanks! I'll check it out. Which installation kit?

01ssreda4

iTrader: (96)

I always buy the Ratech kit, number is like 308 something.