gear swap

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Dec 17, 2004 | 12:22 AM

jhanwell

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Heel & Toe

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gear swap

Can someone tell me in numbers what going from a 2.73 to a 3.42 is like. I guess what I am asking is what is your rpm at 70mph with the 3.42? Also is a torque converter switch neccessary when you swap the gear? Thanks!

Dec 17, 2004 | 12:43 AM

Mitch C

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From: Davie Florida

Quote:

Originally Posted by jhanwell

I had 3.42s in my car, you will be at 2150 RPM at 70 MPH with 3.42 gears.

You don't have to swap converters, but I would strongly recommend that you do install a high stall T/C when you install your gears. A high stall T/C and gears are the best bang for the buck mods on an A4. Good Luck!!

Dec 17, 2004 | 12:49 AM

jhanwell

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Heel & Toe

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Thanks

Thanks Mitch. Any idea how much this should cost and where in chicago to get it done? I realize you are from florida, hopefully others have some ideas.

Dec 17, 2004 | 12:56 AM

1FUNVTT

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High stall TC

What will the High Stall TC do for you? How is this different from the stock TC? Would you install this on a 3.15 RE A4

Greg
03-50thAE - A4

Dec 17, 2004 | 01:33 AM

Mitch C

Melting Slicks

Joined: Jun 2001

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From: Davie Florida

Quote:

Originally Posted by jhanwell

Thanks Mitch. Any idea how much this should cost and where in chicago to get it done? I realize you are from florida, hopefully others have some ideas.

I paid $500.00 labor to install my gears and T/C. I can't help you with a good shop in Chicago.

Dec 17, 2004 | 01:43 AM

Mitch C

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From: Davie Florida

Quote:

Originally Posted by faaty go

What will the High Stall TC do for you? How is this different from the stock TC? Would you install this on a 3.15 RE A4

Greg
03-50thAE - A4

A high stall T/C allows your engine to instantly spool up higher in the power band where it is making a lot more power when you go WOT. The stock T/C stalls at 1600 RPM a 3000 stall T/C would stall at 3000. Your engine makes alot more power at 3000 RPM than it does at 1600 RPM.

Whether or not I would use 3.15 gears with a T/C depends on your plans for your car, and your T/C selection. I would use 3.15s with a small converter (2800-3200) with a high STR. I would want at least 3.42s if the T/C I selected was 3500 stall or greater.

Last edited by Mitch C; Dec 17, 2004 at 01:46 AM.

Dec 17, 2004 | 01:52 AM

1FUNVTT

Drifting

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a big thanks for the TC education. Guess I better study up somemore before doing any mod.

Thanks again!

Dec 17, 2004 | 02:32 AM

Cscokd

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From: Carson City, NV

I created a really cool excel file to calculate RPM vs tire size, gear ratio and even MN6, M12, and A4 transmissions...but I am not allowed to post attachments. Can someone do this for me? I'm sure it would be helpful. Thanks.
John