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Old Sep 1, 2010 | 08:18 PM
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Default Gear Upgrade

I'm wanting to up the rear gear ratio in my 98 automatic from the stock 2:73 to a 3:15. Can anyone recomend a good shop in the Indianapolis area that can do this?
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Old Sep 1, 2010 | 08:20 PM
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Just a suggestion. I would go with 3.42's if I was going to take the time and money to have it done.
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Old Sep 1, 2010 | 08:31 PM
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I realize that Fort Wayne is not Indianapolis, but one of the best is DTE...

http://www.dynotech-eng.com/location.htm
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Old Sep 1, 2010 | 09:23 PM
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Originally Posted by 0331MARINE
Just a suggestion. I would go with 3.42's if I was going to take the time and money to have it done.



You won't regret it.
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Old Sep 1, 2010 | 09:35 PM
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Mike Norris Motorsports, he's the best Corvette guy up there!!!
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Old Sep 1, 2010 | 09:52 PM
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I made the mistake of going 3.15 and I ended going 3.42 on my A4, wasted money and time. Do the 3.42 and save yourself a slight head ache.
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Old Sep 1, 2010 | 09:57 PM
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As others have said, Go the 3.42 gears, The difference between 2.73 and 3.15 isn't worth the cost, You will feel a slight difference going the 3.15 gears, But if you go 3.42 from 2.73 you will really reap the benefit.
Just my 2 cents.
Mr.Bill
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Old Sep 1, 2010 | 10:29 PM
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Originally Posted by Mr.Bill
As others have said, Go the 3.42 gears, The difference between 2.73 and 3.15 isn't worth the cost, You will feel a slight difference going the 3.15 gears, But if you go 3.42 from 2.73 you will really reap the benefit.
Just my 2 cents.
Mr.Bill

i went from 2.73's to 3.42's. nice mod! really woke the old girl up!

i drove an A4 with 3.15's before making my decision. as stated above, not a big enough difference to warrant the price.

btw, i went with an RPM stage II differential.

good luck with your decision!

jeff
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Old Sep 1, 2010 | 11:40 PM
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Originally Posted by 0331MARINE
Just a suggestion. I would go with 3.42's if I was going to take the time and money to have it done.
Very good advice.
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Old Sep 2, 2010 | 12:01 AM
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Originally Posted by road pilot
Mike Norris Motorsports, he's the best Corvette guy up there!!!
I have heard nothing but good thingd about Mike Norris, I am glad he is now in the mid-west.
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Old Sep 2, 2010 | 12:09 PM
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Default Thanks Everyone

How do you contact Mike Norris? I will also check out the Ft Wyne referal. I'll go with the 3:42's

Last edited by wheelhorse; Sep 2, 2010 at 12:15 PM.
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Old Sep 2, 2010 | 03:43 PM
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Mike Norris; he's the Corvette Guru that was one of the first to work on the C5 trans-axle arrangement.
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Old Sep 2, 2010 | 03:53 PM
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Doesn't 3.42 get tiresome on highway? Looking at the gear chart, it's over 2700rpm at 90mph:
http://www.eastcoastsupercharging.co...rGraph-MPH.jpg
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Old Sep 2, 2010 | 03:58 PM
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Originally Posted by T5Mika
Doesn't 3.42 get tiresome on highway? Looking at the gear chart, it's over 2700rpm at 90mph:
http://www.eastcoastsupercharging.co...rGraph-MPH.jpg
nope, doesn't get tiresome on the highway at all...anything up to 75 - 80 mph is no problem, noise or otherwise, lots more power too! at ALL RPM! I just went to 3.42 from 2.73, with a 2800 Vig stall, best mod to date!
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Old Sep 2, 2010 | 04:04 PM
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Originally Posted by T5Mika
Doesn't 3.42 get tiresome on highway? Looking at the gear chart, it's over 2700rpm at 90mph:
http://www.eastcoastsupercharging.co...rGraph-MPH.jpg
Here in AZ where the average highway speed limit is 75 mph and most people travel at 85 mph there is no excessive noise or anything. Once I get to Phoenix where its lower in altitude @ 75mph I still get between 30-32 mpg on my fuel display I think I have a pic if I can dig it up Ill post it.

here u go w/ 3.42 gears

Last edited by 02*C5; Sep 2, 2010 at 04:10 PM.
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