Rear end gears - Pontiac GTO Forum
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post #1 of 8 (permalink) Old 10-09-2006, 10:36 PM Thread Starter
 
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Rear end gears

Hey guys, I was just wondering what gears come stock on the 06 goat. 3.42's, 3.73's?

And I was curious as to 1/4 mile times for the people who put a higher gear in their's.

Thanks.

BT
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post #2 of 8 (permalink) Old 10-09-2006, 11:08 PM Thread Starter
 
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Oh yeah, i did a search for rear end gears, and I couldn't find anything about stock gears. I did find one talking about how high of a gear you could get into one, but that is it. Any info would be appreciated.
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post #3 of 8 (permalink) Old 10-10-2006, 08:50 AM
 
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GTO's come stock with a 3.46 rear end. Most go to a 3.91

I did calculations using formulas found online (2005 stock 17in tires):
approx top speed in each gear @ 6500 rpm
gear/ratio...3.46...........3.73...........3.91
1st.......... 48.3...........44.8...........42.8
2nd......... 69.4...........64.3...........61.4
3rd.......... 100............93.1..........88.8
4th.......... 143............133...........127
5th.......... 171............159...........151
6th.......... 252............234...........223

Not sure how much quicker the different rears make you
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post #4 of 8 (permalink) Old 10-10-2006, 02:47 PM Thread Starter
 
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Thanks alot man. Thinking about putting some 3.73s in the future. My 06 is still bone stock, and I can't wait to start doing minor mods. Looking at CAI and exhaust (like most people) for my first mods. Although pockets aren't THAT deep. Going to have to save awhile.
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post #5 of 8 (permalink) Old 10-10-2006, 06:46 PM
 
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Your first mod won't cost you a cent. Remove the rubber dampers from your hood scoops and get some cool air into that hot engine compartment.
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post #6 of 8 (permalink) Old 10-10-2006, 11:35 PM Thread Starter
 
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You know, I actually read a pretty long thread about that earlier today on here. Then seeing your post, SloTymer, I went and took them out. Thanks fellas.
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post #7 of 8 (permalink) Old 10-11-2006, 02:10 AM
 
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What would a set of 3.73 gears run cost wise?
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post #8 of 8 (permalink) Old 10-11-2006, 08:15 AM
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Originally Posted by SloTymer View Post
Your first mod won't cost you a cent. Remove the rubber dampers from your hood scoops and get some cool air into that hot engine compartment.
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