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V6 S197 General Discussion This section is for technical discussions pertaining specifically to the V6 variation of the 2005 and newer Ford Mustang.

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Old 05-15-2012, 01:34 PM   #1
Cabbage
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Default Rear Differential + Warranty

Hi Guys, haven't been on in a LONG time. Got a call from my service guy today that my rear differential is going out (took it in for a sound in the rear end) he can't fix it but says it may cost 2k-3k to get it done somewhere. I think it MAY still be under warranty but I've added a CAI and Tune to the car. Would this void my drive train warranty if it is? If so are there instructions anywhere for how to put back on the stock filter assembly? It's been a few years since I did the mod.
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Old 05-15-2012, 02:18 PM   #2
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Differential , if done at a differential shop should cost like 600$-900, And i think that includes new gears etc.

I dont think those mods should void warrantee against a failing differential but im not 100% sure.
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Old 05-15-2012, 02:20 PM   #3
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Quote:
Originally Posted by Andy13186 View Post
Differential , if done at a differential shop should cost like 600$-900, And i think that includes new gears etc.

I dont think those mods should void warrantee against a failing differential but im not 100% sure.
agreed.
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Old 05-15-2012, 02:30 PM   #4
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You are under warranty and you're giong to take it somewhere else to get fixed besides ford...? Oh and you're having gears put in it...? Ford won't cover the rear diff anymore under warranty since it's been tampered with. The rest of the drive train will still be covered but not the diff.
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Old 05-15-2012, 03:26 PM   #5
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Originally Posted by Derf00 View Post
You are under warranty and you're giong to take it somewhere else to get fixed besides ford...? Oh and you're having gears put in it...? Ford won't cover the rear diff anymore under warranty since it's been tampered with. The rest of the drive train will still be covered but not the diff.

I was going to take it somewhere else to get it fixed if I'm not under warranty any longer, this would be the last month of my 5th year so I need to find out if it's by month or by the day the contract was signed which would have been yesterday.

I would only upgrade the gears if it's not under warranty as well.

Why would the rest of the drive train be under warranty but not the diff because of a CAI?
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Old 05-15-2012, 07:10 PM   #6
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OK Just as suspected my warranty expired yesterday. Such is my luck.

Is this a job I can do myself, and are there any good instructions out there to perform a differential swap?
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Old 05-15-2012, 08:09 PM   #7
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You can order a new rear axle complete with a 3;73.1 differential from Roush for $1100 bux.
http://www.ebay.com/itm/2005-12-FORD...ht_2034wt_1002
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Old 05-16-2012, 01:07 PM   #8
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I would recommend replacing the entire axle assembly if you can find one that meets your needs. Having recently swapped out my gears, I've discovered how hard it can be finding a competent rear end specialist.
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Old 05-17-2012, 08:01 AM   #9
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I would recommend replacing the entire axle assembly if you can find one that meets your needs. Having recently swapped out my gears, I've discovered how hard it can be finding a competent rear end specialist.
If I decide to go down the road and trade this in (Dealer already gave me a good price) should I keep my tuner and CAI and put it back to stock, or can I get more trade in value with it on? What is the SOP for trade in with CAI+Tuner(+GT Exhaust for that matter)?
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Old 05-17-2012, 09:08 AM   #10
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Dealers prefer to have a car that is stock. Easier for them to service because they know what was done and how to fix things. Easier to sell that way.
So return it to stock and take off the CAI.
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Old 05-17-2012, 09:08 AM
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2007, 2008, 2013, changing, differential, end, ford, gear, gears, issues, mustang, rear, v6, void, warranty

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