3.90 as first mod
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On The Tree
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3.90 as first mod I have a 2000 TA m6, stock except for an slp lid. Im going to do arh lt headers, ory and catback at some point. In looking to gain some performance without spending 2 grand, i was going to do 3.90 gears. On a stock car, will there be a noticeable difference, would it be a bad idea to do this before the exhaust?
Going from the stock 3.42s' to 3.90s' will be a noticeable difference. Most M6'ers go to 4.10s,not trying to talk you out of 3.90s',just saying what most go with.
Will be a 14% increase in torque to rear wheels
Will be a 14% increase in torque to rear wheels
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On The Tree
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Unless I'm completely wrong, which isn't outside the realm of possibility
Thread Starter
On The Tree
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however to the op I run 3.90s and like them a lot they are def a big difference over 3.42's. i felt that the 4.10's are just a little too short for the street and st gear is almost non existent. as you said the 3.90s are a little stronger because of the larger pinion and should hold up a little better. people break 10 bolts often with an m6 but i think as long as you dont do clutch dumps at the track with a good tire you'll be ok.
keep in mind that the 3.90s are only available as a performance gear cut and there may make a little noise. mine have a slight noise around 45-55 but you need to have the windows up and radio off to hear it and even then you'd have to know what to listen for. with that said i love my 3.90s and have no regrets.
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On The Tree
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Im aware that the 10 bolt is weak. Ive had the car for 6 years and it hasnt seen the track and i havent launched it yet, the mods are for the fun factor.
Thanks redbird, thats what Im looking to here, big upgrade, lots of fun.
Thanks redbird, thats what Im looking to here, big upgrade, lots of fun.
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I just got 390 gears installed .I went with them over 410 due to there the same size as my old 373 auto setup.As said earlier i can still get some use out of first gear.If i was in your situation i might consider longtubes ,exhaust,maybe tune first then gears but thats the way i did it,Gears will give a good kick in the pants feeling for the price.
Id just like to share this so you can play around with it a bit. http://www.csgnetwork.com/rpmcalc.html
Put in your tire diamater (if stock about 26") put in the gear ration, and the top gear of an m6 is .5 You can play around with it and see how your RPM's will change when you put different gears in the car
Put in your tire diamater (if stock about 26") put in the gear ration, and the top gear of an m6 is .5 You can play around with it and see how your RPM's will change when you put different gears in the car
3.90's are a great gear for these cars...even near stock or 1st mod.
4.10's are a bit to much gear unless your running a taller tire than stock...then your really asking for trouble out of the 10bolt.
4.10's are a bit to much gear unless your running a taller tire than stock...then your really asking for trouble out of the 10bolt.
I had 4.10s in stock 10 bolt and they were fine. Now I have 3.89s in a 9" and I like it a little better. I like how first gear doesn't go by so quickly with the 3.89, and there is a couple hundred rpm difference at 70.
From a performance standpoint, gears as a first mod won't get you faster et's. But like you said you're just looking for fun factor, the car will FEEL a ton faster and be more fun when downshifting and taking off.
A bonus with steep gears is that you can cruise around in town in 5th or even 6th gear.
From a performance standpoint, gears as a first mod won't get you faster et's. But like you said you're just looking for fun factor, the car will FEEL a ton faster and be more fun when downshifting and taking off.
A bonus with steep gears is that you can cruise around in town in 5th or even 6th gear.
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On The Tree
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Part of the reason im going to so the gears is that one of the rear wheel studs snapped off when trying to loosen it by hand. Ive been told it can only be replaced by pulling the axle, im def going to do gears in the future so i dont want to have pay to pull the axle twice.
One of the reasons gears hopped to the front of the list.
I've done rear gear change in an a4 and m6. For the money, there isn't a much more fun mod you can do.
I'm sure you're next thread will be "what brand gears should I get?" I've used Motive gears with good success no noticeable noise increase.
I'm sure you're next thread will be "what brand gears should I get?" I've used Motive gears with good success no noticeable noise increase.
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On The Tree
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I actually already planned on motive gears, so thanks for the confirmation!
12 Second Club
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From: Bucks County, Pa.
I went from 4.10s installed when the car was <2 years old, to 3.73s because of the strength factor, as well as because that gives the same effective overall ratios as the C5 Z06's MN12 Tremec with it's stock 3.42s.
MUCH, MUCH better for open tracking/road racing than the unusable 4.10s, and more responsive than the stock 3.42s with the stock MN6 Tremec.
That being said, IF there were 3.90s with even a chance of being quiet, and guaranteed to be made HERE, I would have considered them.
MUCH, MUCH better for open tracking/road racing than the unusable 4.10s, and more responsive than the stock 3.42s with the stock MN6 Tremec.
That being said, IF there were 3.90s with even a chance of being quiet, and guaranteed to be made HERE, I would have considered them.
I went from 4.10s installed when the car was <2 years old, to 3.73s because of the strength factor, as well as because that gives the same effective overall ratios as the C5 Z06's MN12 Tremec with it's stock 3.42s.
MUCH, MUCH better for open tracking/road racing than the unusable 4.10s, and more responsive than the stock 3.42s with the stock MN6 Tremec.
That being said, IF there were 3.90s with even a chance of being quiet, and guaranteed to be made HERE, I would have considered them.
MUCH, MUCH better for open tracking/road racing than the unusable 4.10s, and more responsive than the stock 3.42s with the stock MN6 Tremec.
That being said, IF there were 3.90s with even a chance of being quiet, and guaranteed to be made HERE, I would have considered them.