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Old 06-28-2010, 11:18 AM   #1
73duster
 
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Anyone put 3.73 gears on l99 yet?

I'm considering getting 3.73 gears for my automatic. I really want the car to pull harder from a stop as these cars are so heavy. Has anyone used these gears? and if so, is it a noticable difference from stock? I see a lot of 4.10 gear swaps, but that may be too much for an l99. Any quarter mile times?
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Old 06-28-2010, 12:53 PM   #2
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Originally Posted by 73duster View Post
I'm considering getting 3.73 gears for my automatic. I really want the car to pull harder from a stop as these cars are so heavy. Has anyone used these gears? and if so, is it a noticable difference from stock? I see a lot of 4.10 gear swaps, but that may be too much for an l99. Any quarter mile times?
We have had several customers do 3.73s in the L99 cars. There is a significant improvement in acceleration. You are correct that the 4.10s would be too much, the automatic transmission is geared more aggressively than the manual.
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Old 06-28-2010, 01:15 PM   #3
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I'm going with 4.10's on my L99, should be fine with the 6 speeds.
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Old 06-28-2010, 03:10 PM   #4
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Old 06-28-2010, 04:33 PM   #5
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Any quarter mile comparisons between stock and after gear change?
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Old 06-28-2010, 05:32 PM   #6
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Seems like tires that aren't as tall would have the same benefit.
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Old 06-28-2010, 05:52 PM   #7
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there would be some similarity. I am going to use the 4.10s with the L99 and use a slightly taller tire.
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Old 06-28-2010, 06:39 PM   #8
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Originally Posted by 73duster View Post
Any quarter mile comparisons between stock and after gear change?
I don't have that, but this chart was posted a couple of days ago. It should give you an idea of the equivalent torque increase you would gain with a gear set.

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Old 06-29-2010, 03:37 PM   #9
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just order my 3.73's for my A6

KEEP EVERYONE POSTED ON RESULTS
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Old 06-29-2010, 07:09 PM   #10
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just order my 3.73's for my A6

KEEP EVERYONE POSTED ON RESULTS
Thanks for the order! Can't wait to see your perma-grin.
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Old 06-29-2010, 10:48 PM   #11
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I chose to go with the 3:73's for my A6. I think the 4:10's would have been nice, but i would be buying tires constantly. IMO they would be overkill if not on the track all the time.
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Old 06-30-2010, 07:06 PM   #12
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I chose to go with the 3:73's for my A6. I think the 4:10's would have been nice, but i would be buying tires constantly. IMO they would be overkill if not on the track all the time.
3.73s are the right choice for most A6 drivers.
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Old 06-30-2010, 10:33 PM   #13
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I'm waiting to hear how you like the gears. What i'm most interested in is how much of a difference from stock does it feel? How much quicker in the quarter mile? Being that it's an expensive and serious change, I want to be sure it's worth it. I'm thinking this is a bigger change in a daily driver than a cam, especially because of the weight of these cars.
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Old 07-01-2010, 04:54 AM   #14
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I'm thinking this is a bigger change in a daily driver than a cam, especially because of the weight of these cars.
It makes a huge improvement.
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