Swapping for 4.10's
Thread Starter
Instructor
Joined: Dec 2008
Posts: 226
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From: Charlotte, NC / Mesa, AZ
Swapping for 4.10's
Hey guys, I am VERY new to this gear swap idea....however I have heard great things about it. Right now I have an 03 MN6 Coupe with ONLY a vararam (and soon to be BB Bullets)... what do i need to know about swapping out the 3.42's and putting in 4.10's .... will my stock car take that? Are the tires going to break loose every time i step on the gas a little? MPG? any other work that will need to be done in order to compensate for the bigger gears?
Thanks guys!!
Thanks guys!!
Last edited by Scoops03; Mar 19, 2009 at 11:33 AM. Reason: Tranny clarification
Team Owner
Joined: Jan 2004
Posts: 22,185
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From: NJ
Since its got 3.42's I am assuming it is a 6 speed, so you shouldn't have to do anything else. My neighbor has 4.10's in his 2002 coupe and LOVES them. If and when I go to gears, it will be 4.10's for sure.
If the car is an auto it will need a reprogram for the speedo to read correctly.
If the car is an auto it will need a reprogram for the speedo to read correctly.
Premium Supporting Vendor
Joined: Jan 2001
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From: Central Jersey
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4.10's are a great choice for stock internal or head and cam cars. If you plan on going forced induction in the future I would suggest staying eith the factory 3.42 gears though. While you are doing the gears I would suggest doing out trans brace as an added safety feature.
http://www.eastcoastsupercharging.co...rut_Brace.html
http://www.eastcoastsupercharging.co...rut_Brace.html
Team Owner
Joined: Jan 2004
Posts: 22,185
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From: NJ
Thread Starter
Instructor
Joined: Dec 2008
Posts: 226
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From: Charlotte, NC / Mesa, AZ
Team Owner
Joined: Sep 2001
Posts: 23,283
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From: Lake Elsinore, CA
Neither the MN6 nor the A4 require speedo recalibration since the speed sensor reads the output in the diff. An A4 does need shift point retuning though. Your MN6 will not need anything special programming-wise. I put 4.10's in my MN6 and the 3.42's from that went in my wife's A4. Love 'em both.
I would recommend you buy a converted diff from a tuner like DTE rather than chancing a bad install of ring/pinion by a local shop unless they have lots of experience setting up C5 diffs. Lots of folks have tried saving money doing just that and ended up having to have it redone due to an improper setup.
I would recommend you buy a converted diff from a tuner like DTE rather than chancing a bad install of ring/pinion by a local shop unless they have lots of experience setting up C5 diffs. Lots of folks have tried saving money doing just that and ended up having to have it redone due to an improper setup.
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Drifting
Joined: Apr 2008
Posts: 1,316
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From: St. Louis Mo
Contrary to Chevy guys comment that you ll need a reprogram for the speedo to read correctly- No, it ll read correctly, regardless of gearing. It won t SHIFT correctly(in an auto) though! You ll want a reprogram for that! And<for the price< Get a differential with the gears already installed. Its not particularily cheap to get gears set up, but finding a diff at a good price isn t hard! I Just sold a low mile 4.10 geared diff(worked flawlessly) for $650 shipped! They will appear for a good price and will save u from having to get the gears set up.(& $) On top of that, you can sell your stock differential to recoup part of your $$ towards the new/used diff....And swapping the diff isn t a hard job at all! Ill NEVER buy gears only. Ill ALWAYS purchase awhole diff!
Go with the Diff/trans Brace!(DTE or ECS) Added strength/insurance. Good Luck!
Go with the Diff/trans Brace!(DTE or ECS)
Added strength/insurance. Good Luck!
Safety Car
Joined: Mar 2007
Posts: 3,518
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Contrary to Chevy guys comment that you ll need a reprogram for the speedo to read correctly- No, it ll read correctly, regardless of gearing. It won t SHIFT correctly(in an auto) though! You ll want a reprogram for that! And<for the price< Get a differential with the gears already installed. Its not particularily cheap to get gears set up, but finding a diff at a good price isn t hard! I Just sold a low mile 4.10 geared diff(worked flawlessly) for $650 shipped! They will appear for a good price and will save u from having to get the gears set up.(& $) On top of that, you can sell your stock differential to recoup part of your $$ towards the new/used diff....And swapping the diff isn t a hard job at all! Ill NEVER buy gears only. Ill ALWAYS purchase awhole diff!
Go with the Diff/trans Brace!(DTE or ECS) Added strength/insurance. Good Luck!
Go with the Diff/trans Brace!(DTE or ECS)
Added strength/insurance. Good Luck!The Predator handheld tuner can adjust the PCM for the new gear ratio and adjust the shifting.
Team Owner
Joined: Jul 2004
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From: NJ
St. Jude Donor '05-'08
We do 4.10 gear swaps at the shop all the time, but we have been doing it for years. I would not go to someone that didnt know the vette.
Most people enjoy 4.10 gears in their car. I loved them even with 460rwhp, but when I started to get into road racing I dropped down to 3.73.
Most people enjoy 4.10 gears in their car. I loved them even with 460rwhp, but when I started to get into road racing I dropped down to 3.73.
Melting Slicks
Joined: Jun 2006
Posts: 2,983
Likes: 6
From: Redondo Beach Ca
We do 4.10 gear swaps at the shop all the time, but we have been doing it for years. I would not go to someone that didnt know the vette.
Most people enjoy 4.10 gears in their car. I loved them even with 460rwhp, but when I started to get into road racing I dropped down to 3.73.
Most people enjoy 4.10 gears in their car. I loved them even with 460rwhp, but when I started to get into road racing I dropped down to 3.73.
