I thought we were saying the same thing at the beginning, too. You confused me lol.
What gears for a 08 GT
- Thread starter 08_stanger
- Start date
I thought we were saying the same thing at the beginning, too. You confused me lol.
Dont fear the gear!! Ive got 4.10`s with a Saleen blower 10lbs boost and love it. My wifes 08 vert is n/a and also has 4.10`s. My friends 04 Cobra would pull me out the hole by a car length when I had 3.73`s , now I pull him by a car then in second I pull another car length on him. These cars are heavy and need the 4.10`s to get it out the hole quicker. If you buy the 3.73`s or 3.90 it will seem quick at first but you`ll get used to it and then regret not getting the 4.10`s. Oh ive also got the factory 18`s.
I am looking at buying a Stang, 05-08, not sure which yet. I had an '01 Bullitt with 4.10's and it was a beast for having nothing else done to it. But, the gas milage was horrible on the highway, about 13-15 mpg and it too had the "I need another gear" feeling when on the highway, but it was a blast to drive. I plan to put some aggressive looking 20" wheels on the new one. Would the 4.10's be best? Will the new gears void the warranty?
xxrequiemxx
Member
fobra559
At least it's more erect and not floppy anymore.
anthony05gt
Active Member
kooldawg6
mine works really well and can take a fair amount
I have 4.10s in my auto and love them! I have run both the OEM 27.2" tire and 28.3" rear tire with no issues at all being a DD. I've put about 26K miles on her with the 4.10s since March. I do some "spirited" driving and avg 19-20 MPG. If I stick with the 28.3" or find a taller street tire that fits, I may go with the 4.30s until I go F/I(if I do).
kooldawg6
mine works really well and can take a fair amount
The 4.10s will help being that you will be adding unsprung weight with 20s.
Sparty92
Member
I have been wondering the same thing.
My car is a daily driver, 5M, 3.55s, stock 17" wheels. I've been to the track 1 time in 2007, and don't have plans to go other than maybe a couple times a year.
What I am looking for is performance on the street and highway. Highway, in terms of MPG.....and street in terms of....well...uh, some good acceleration here and there.
(The first paved road in the USA, and unofficial factory muscle car proving ground, is a few miles away from me, Woodward Avenue, Michigan).
I MAY go to an 18" or 20" wheel. I don't want to add massive unsprung weight (I may autocross this car), so 20s will be my 2nd choice. I've found that the stock tires are very tall, with the size being 235/55/17. Most (all?) replacement tires in a 245, 255, 275 width (can't find and don't want 235s) are 50/45/40 in sidewall height. I never checked the O.D. but it seems like it might be lower than my current stock height.
Would 4.10s cause any problems on the highway? I've seen some muscle cars around here that burned up their rear diffs from driving on the highway for too long, or too fast...or maybe they just had sucky rear ends?
I had a "cough" 1999 Honda Civic Si "cough" a few years ago, and I don't know what the factory gears were, but at 80mph in 5th, I was turning 4,000 rpm. Still pulled 28mpg.
Thanks again for this great thread!
My car is a daily driver, 5M, 3.55s, stock 17" wheels. I've been to the track 1 time in 2007, and don't have plans to go other than maybe a couple times a year.
What I am looking for is performance on the street and highway. Highway, in terms of MPG.....and street in terms of....well...uh, some good acceleration here and there.
(The first paved road in the USA, and unofficial factory muscle car proving ground, is a few miles away from me, Woodward Avenue, Michigan).
I MAY go to an 18" or 20" wheel. I don't want to add massive unsprung weight (I may autocross this car), so 20s will be my 2nd choice. I've found that the stock tires are very tall, with the size being 235/55/17. Most (all?) replacement tires in a 245, 255, 275 width (can't find and don't want 235s) are 50/45/40 in sidewall height. I never checked the O.D. but it seems like it might be lower than my current stock height.
Would 4.10s cause any problems on the highway? I've seen some muscle cars around here that burned up their rear diffs from driving on the highway for too long, or too fast...or maybe they just had sucky rear ends?
I had a "cough" 1999 Honda Civic Si "cough" a few years ago, and I don't know what the factory gears were, but at 80mph in 5th, I was turning 4,000 rpm. Still pulled 28mpg.
Thanks again for this great thread!
those little ricers need the RPMs to pull itself along at 80mph. even a Kia Rio turns 3000 rpm at only 60mph. they also redline 7000-9000 rpm depending on the car.
4.10s will put you under 3000 RPM on the highway (80mph)...half of the redline for a GT. were these muscle cars 60s cars? 40 year old rear ends are prone to breakage anyway.
4.10s will put you under 3000 RPM on the highway (80mph)...half of the redline for a GT. were these muscle cars 60s cars? 40 year old rear ends are prone to breakage anyway.
Sparty92
Member
This sounds reasonable to me....a mere 500 rpm over my current setup. I suppose there's no real risk of "overheating" the rear end or anything?
I grabbed this text from the current Shelby Performance Catalog:
Again, my car is a total daily driver (yes, even in Michigan winters). I also saw that 3.73s are covered under warranty by Ford (if installed by Ford), but the 4.10s are not (Drag Pak). I also saw an asterisk next to the part number for the 4.10s in the 2008 Ford Motorsport catalog....something about not for sale or use on pollution-controlled vehicles.
I don't plan on having the dealer install these gears, so I'm not really concerned about warranty...the shop is plenty capable.
PUNISHER RACING
Active Member
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