Fox Mustangs 1979-1993 Mustangs Member Tech & Restoration Discussion

replacing stock rear end gears....suggestions?

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Old Nov 10, 2007 | 02:57 PM
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GT5088's Avatar
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From: smallest state in the union.
replacing stock rear end gears....suggestions?

I am going to take my car to my dads friends machine shop to have them switch the rear end gears..I havent bought the gears yet because I wasnt sure what set to go with....some people suggest 4:10's but I think I won't like them because I do drive the car on a regular basis, even though I take it to the dragway several times a year....I was thinking 3:73's, but didn't know if anyone suggested anything different...
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Old Nov 10, 2007 | 04:04 PM
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From: Odenville, AL
Personally I would go with 3.73's max...rule of thumb I use is for a 5 speed car...3.55 to 3.73 for street and occasional strip use....3.73 to 4.10 for an auto car.
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Old Nov 10, 2007 | 05:32 PM
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I love my 3.73s, I was worried about highway RPMs but I can drive 80mph for long stretches and not worry about anything... its just loud. 1st gear doesn't long either
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Old Nov 11, 2007 | 01:08 PM
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From: smallest state in the union.
thanks for the advice guys, that makes my decision much easier....I'm going to order the 3:73's
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Old Nov 11, 2007 | 01:34 PM
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That is the smart move on your part you will enjoy the ride..
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Old Nov 11, 2007 | 02:06 PM
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what do the 06 GT's come with from the factory?
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Old Nov 11, 2007 | 03:54 PM
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From: Miami
If you check the sticker on the door you will find one of these codes

Rear Axle Codes
BG — 3.31 — non-limited slip, base vehicle with manual or automatic
CD — 3.55 — limited slip, GT with manual transmission
CG — 3.31 — limited slip, GT with automatic transmission

Hope this helps.....
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Old Nov 11, 2007 | 05:27 PM
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From: smallest state in the union.
I think the 3:37's will be good...especially compared to the stock set
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Old Nov 11, 2007 | 07:08 PM
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In my eariler post I meant "1st gear doesn't last long". The guys in the S197 forum should have your answer about the '06
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