i have a daily driven 89 firebird bandit 2 edition with 32,000 miles on it just got it from my dad a month ago it as a stg 2 jet chip borla dual exhaust deleted cat and k&n drop in i will be also planning on getting 4.10 gears was wondering if 4.10 gears will be good for daily driving and will it still keep its top end even tho its an automatic???? thanx for the help

 

410's are too steep for either. Your fuel mileage will be nothing, and you will top out on RPM's at like 80mph.

A good street gear eor an auto is 3.42 - gives a jump off the line, but keeps top end and mileage reasonable. I have 342's with an auto and a carbed 350, and I get about 17mpg. 373's are popular, but drop the mileage down to about 10mpg on a 350 auto.

What is in there now?

And, BTW - your title says tranny help, but this is a rear end question - you do know we're talking rear end gears, right? Just checking.

 

The car is stock other than the mods i said before so i guess it has the stock gear. My goal for the car as of now is to get it running in the low 12 high 11 range.