using "tire chirping" as a means of power delivery is useless.

it just means you have crappy tires and/or improper alignment (cambered ass tires dont get much rubber to the ground).

go on the freeway and go 80mph. tell us where the RPM is.

3400rpm its an LS transmission
4000 its a GSR
4400 its a b16 or type R
4700 or higher, and you either have a 4.78 final drive or something special-er

get the car on jackstands.

spin the front wheels while they're in the air, if both spin in the same direction, congratulations you have an lsd equipped transmission.

:thumbup: