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Old 07-12-2013, 04:14 PM   #1
bclev
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Default Quick opinions Please..

I just bought a 2008 Mustang Gt and the speedo was off and so I had been trying to figure out why and it came with a tuner and so I decided to tune for gear ratios and got to 4.10 and now the speedometer is correct.. at 70 mph in 5th i'm right at 2400 rpm, 80 close to 2800-2900.. first gear is also EXTREMELY short. so I was wondering if any of yall think that sounds like 4.10s before I take the time to get out in this 100+ degree weather and jack it up to see.
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Old 07-12-2013, 05:17 PM   #2
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4.10s at least. I think American Muscle has a rpm table on there sight. Look up 4.10 gears and I think it's on that page. Doesn't seem like I'm quite that high at 70. But I'm going to say yes to 4.10s.
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Old 07-12-2013, 06:33 PM   #3
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k cool.. thats what I thought but thought id ask
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Old 07-12-2013, 09:08 PM   #4
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Sounds like 4.10's. If you can leave a stop in 3rd gear (manual) it's at least 4.10. What tire size do you have? I can give you a table. Auto or manual?
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Old 07-13-2013, 09:43 AM   #5
bclev
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255/35-20 front and 275/35-20 rear and i've started from fourth.. it was really bogged down but I did it.
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Old 07-13-2013, 10:49 AM   #6
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and burned some clutch I might add.
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Old 07-13-2013, 11:04 AM   #7
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4.10's for sure.
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Old 07-19-2013, 06:12 AM   #8
Chevy Convert
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Yep. I'm a butt hair or two under 3k at 80mph.
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Old 07-19-2013, 06:51 AM   #9
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Send me a PM with your email addy and I'll send you an excel spreadsheet for speed vs RPM where you can input your tire size, gears, etc.
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Old 07-19-2013, 04:21 PM   #10
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Yeah based on the spreadsheet Nuke sent me years ago, you likely have 4.10's. The give away is leaving in 4th. I've not tried that yet
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