What gears are better for a 95 z28 auto, 3:23 or 3:42?

 

Neither gear is better. They are just different. What you want to do with them would determine which is better for you. Either way its only a 6% change.

 

do you mind explaining the difference for me?

 

3.42 is a little lower ratio than the 3.23 ,lower gearing gives more off the line power for quicker acceleration but less top end speed.
Think the big sprocket on the back wheel of your old 10 speed bike VS the little sprocket.
Anyhow as Gorn posted it's not a drastic difference,either set is good for a street driven car.
I would suggest the lower gears if you drive mostly in the city and the higher gears if you do a lot of highway driving.

Here is a good read for you explaining gear ratios and how to calculate them.

http://www.chevyhiperformance.com/te...ing/index.html

lifted from the site above........

What's in a Ratio?An automobile uses gear ratios in both the transmission and the drive axle to multiply power. The two ratios multiplied together equal the final drive ratio. Spend a few minutes in any bench-racing session and soon you'll hear rear axle gear ratios discussed. For many performance cars, 3.73s and 4.10s are common gear choices. The rearend gear ratio refers to the relationship between the ring gear and the pinion gear. By simply dividing the ring gear tooth count by the pinion gear tooth count, the ratio is determined. For example, if we divide a ring gear with 41 teeth by a pinion gear with 10 teeth we find that the gear ratio is 4.10:1 (41/10 = 4.10).

 

this helps alot thankyou