It would seem that you have 3.55:1 gears, assuming your tire size is stock.

Here's my "How fast can I go in each gear?" calculator, select the auto transmission from the drop down list and 3.55 as the gear ratio = 89.5 in high gear at 3k RPM...

 

i have an auto...they only have 4 gears

 

Yes and when you only have 4 gears, 4th gear is high gear...

 

i think ima get the gears and save up for a 5 speed swap... what would my top speed be then and if it aint ne higher it will still be funner to drive

 

Top speed in our cars is limited by horsepower, a 3650 with the 3.27:1 stock gears has a theoretical top speed of 225 mph or so. Thing is it would take 500+ rwHP to push it that fast (here's my "How much HP does it take to go how fast?" calculator).

Running n/a 145 to 160 is about as fast as you can get a new-edge rolling, depending mostly on overall gearing.

The 5-speed with 3.73s or 4.10s, and the auto with 3.55s (as you car seems to be), are the "sweet" combinations putting rpms at top speed right on or very close to the HP peak.

My car with the 3650 transmission and 3.73s would be turning a bit over 5k rpm at 160 in 5th, which is just a bit past the HP peaks at 4800. Fastest I've had it going was 138.3 per my GPS receiver.

 

ok awesome....one thing everyone,agree i dont have 4:10's for sure?...i dont wanna blow money on stuff i dont need

 

No way, with 4.10s and the auto tranny you'd be going 78 mph at 3k rpm--again assuming you have stock diameter tires, and were actually going 90 mph at 3k.

 

4th Gear does. Not the car. Now people are going to read this and take is as the car tops out at that.

 

FUNNY>>> when i was on the turnpike heading home last night I took a pic of me cruising at 90 with the CC on... rpms were at about 2800...

that's an automatic.

 

i jus jacked my car up in the driveway and put a piece of tape on the well and fender wheel and a piece on the driveshaft and it spun 3 1/2 times so my guess is i have 3:55's which suck imo and im goin 4:10's!!!