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GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids
View Poll Results: which is the best option
4.30
6
40.00%
4.56
7
46.67%
4.88
2
13.33%
Voters: 15. You may not vote on this poll

4.30, 4.56, or 4.88's w/a 4l80e?

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Old 08-14-2011, 06:42 PM
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Default 4.30, 4.56, or 4.88's w/a 4l80e?

On the street I run a 31.5-32" tire pretty much w/my 22's.

Which would be the best overall option as far as performance/daily drivability?

I need something badly, especially for the track bc I haven't had anything better than a 2.1 60' even on my 27" tall hoosier's. And of course its such a slow take-off on the street Down the road I may do a 75-150 shot as well

Looking for your opinion's about each
Old 08-14-2011, 07:14 PM
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How much highway driving do you do and what's your average hwy speed?
Old 08-14-2011, 07:30 PM
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well before it was much, but now (until I get another MPG car) it will be a lot w/my new job I start tomorrow. I normally sit between 65-70 so right now I'm right around 1900-2000rpm.

I've been playing with the calculator and here is what I come up with the rpm/speed:

3.73 - 1950 @ 70 (currently)

*estimates

4.30 - 2300 @ 70
4.56 - 2400 @ 70
4.88 - 2700 @ 70

I don't know how accurate they may be but its all I can go off

the 4.88's sound fun though but really any of them would be a significant improvement
Old 08-14-2011, 09:00 PM
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Almost .3 going from 3.73's to 4:30's..
Old 08-14-2011, 09:48 PM
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E.T. wise? Where your at in your sig is about all I wanna be really.
Old 08-15-2011, 12:22 AM
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i hate my 3.73s but with this converter you cant even tell. ill destroy these tires on rolls and a dig is pointless.

im still gonna do gears though. im going with 4.56's sinc they dont have a 4.3 for the 14 bolt. i didnt wanna vote since i personaly havent done it.
Old 08-15-2011, 06:53 PM
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anyone else with some incite?
Old 08-16-2011, 12:53 AM
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Decide what your 1/4 mile mph goal is and gear accordingly. 4.88's are fun at a stop light but your wasting time shifting into OD at the strip.

O'yea, are you racing or are you driving to work? Is it really worth gaining a tenth or two for a loss of fuel mileage or long term dependability? For some it is, but thats a question you have to answer.
Old 08-16-2011, 01:17 AM
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In your case, I'd go with 4.56s
Old 08-16-2011, 02:45 AM
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4.56s for u


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