,since my wife ordered my car because i was in iraq,and i cant find the window sticker that tells you whats in the car, how do i tell if i have 3.55 gears because they are not stock in the 07 like alot of people think its a $100 option. also do all gt's have positrack or whatever its called so both wheels spin not one, or is that an option too?

 

I already answered these questions before. I told you where to look and how to tell if it was traction lock.

 

All GT's have Traction Loc. (Positraction was a GM unit produced by Eaton).

 

thanks gene, ZZ sorry i dont recall the answer.

 

look at the tag number located on your rear axle cover, it's held on with one of the rear cover bolts, if you see a 3L55
that would indicate you have a locking 3.55 rear ratio.
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Run it up to 6k rpms in 3rd gear. You should be running just over 100mph.If you are going 110 or faster then you have 3.31.

I guess you could do it in 2nd gear, if you hit 68mph@6000, you have 3.55's, if you're doing 73mph@6000, you have 3.31's. Not as big of a difference in 2nd though.

 

thanks guys. yeah i heard about the tag but it was cover up by the undercoating by the dealer.

 

So scrap it off.

 

If that doesn't work maybe you could ask the dealer? They should be able to get you the info.

 

scrap it off knowing my luck it would scrap the tag off 2