im looking at gears on 9bolt.com. the 4.11, 3.90, 3.70. i got a 700R4 and i drive my car on the highway to the drag strip and i like to be able to still just not at 4 grand. i really like to get my 60 feet time under 1.900's. not an ever day diver. i have a 3.27 and it's ok but time to try something new. what do you guys like better for the gears. thanks

http://www.9bolt.com/gearsets.html

 

With the 700R4, I wouldn't recommend anything deeper than 3.70 unless you're going to use a taller tire.

I got my car into the 11's with a 3.27 gear and 26" tall tires.

 

OK, thanks for info 3.70 sound fine to me. i know it throw off my speedo so where can i find the piece that going in the trany, to fix that.

 

3.70 gears and an automatic trans you will need a 15 tooth drive gear and VSS and a 45 tooth driven gear. You can get those from a GM Dealer or any 700R4 tranny shop.