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bclev 07-12-2013 04:14 PM

Quick opinions Please..
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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.

CPTCO 07-12-2013 05:17 PM

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.

bclev 07-12-2013 06:33 PM

k cool.. thats what I thought but thought id ask

JCON 07-12-2013 09:08 PM

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?

bclev 07-13-2013 09:43 AM

255/35-20 front and 275/35-20 rear and i've started from fourth.. it was really bogged down but I did it.

bclev 07-13-2013 10:49 AM

and burned some clutch I might add. :icon_deadhorse:

ski 07-13-2013 11:04 AM

4.10's for sure.

Chevy Convert 07-19-2013 06:12 AM

Yep. I'm a butt hair or two under 3k at 80mph.

Nuke 07-19-2013 06:51 AM

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.

JCON 07-19-2013 04:21 PM

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 ;)

bclev 07-20-2013 04:15 PM

I smoked the clutch a bit.. it was cool cause never drove anything that could do it!! but ive got a warranty so if I tear the clutch up ill get it done for 100$ :icon_woot:

Nuke 07-20-2013 06:15 PM


Originally Posted by bclev (Post 8251381)
.... ive got a warranty so if I tear the clutch up ill get it done for 100$ :icon_woot:

So you paid how many 100's of dollars for an extended warranty to save 1 or 2 hundred? :icon_woot:

You could have put that money into a separate interest bearing account to use for repairs as you need them and still have money left over after you get rid of the car.

JCON 07-20-2013 09:28 PM

I bought an extended warranty on my 05 v6 only because it was 100% money back if unused at the end of it's term. Didn't bother with the 05 GT, don't regret it one bit. Would not buy one that isn't 100% money back.

bclev 07-24-2013 02:06 PM

I'm sure Ill use it for what its worth! if I have a warranty i'm sure not gonna baby it

AMWill 07-24-2013 02:48 PM

I agree it seems like a 4.10 gear ratio with your tire height. Also it sounds like the extended warranty is coming in handy. I hope they don't void the clutch warranty because of the gears, though.


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