Transmissions and Drivetrain Need help with your trans? Problems with your axle?

From 2.73 to 3.42

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Old Apr 11, 2004 | 08:42 AM
  #1  
Black91Z28's Avatar
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From: Nebraska
Car: 1991 Camaro z28
Engine: 350 Tpi
Transmission: 700r4 Auto
From 2.73 to 3.42

I'm taking my car out of storage on wednesday (april 14) and im taking it straight to the shop to beef up the rearend. I want to put some new and stronger gears in the rearend but im debating on what gears to get..Can anyone help me? I wanted to get 3.42 but i heard you wont notice much diff between the 2.73 and 3.42 in a SOTP feel. I really need some advice on what to get (3.42, 3.73) but i dont want to sacrifice huge amounts in the gas mileage department since the prices of gas are going nowhere but up! Last thing, which are the best brands of gears to go with that wont make loud noises or sound like they grind, etc.

Thanks in advance guys and girls

Eric

Last edited by Black91Z28; Apr 11, 2004 at 08:45 AM.
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Old Apr 11, 2004 | 10:19 AM
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From: Manitoba
Car: '91 GTA
Engine: 421sbc
Transmission: Powerglide
Axle/Gears: Ford 9" with 3.89
I have a '91 GTA with a 305. I changed my gears from 2.73 to 3.42. I lost maybe 1-2 mpg. The difference in acceleration was WAY better! I could actually spin my tires out of the hole!!
This is my opinion only,but, I would go for the 3.73's. Reason is this. if you are going to go thru the $ and the trouble, go for the gold. Not much $ more. You have to get a series 3 carrier anyway!!

As for the brand, if you are not putting huge hp to the car, as long as the gears are properly aligned, I'm sure any brand will do. I have "no names" and I have put 6000 miles on mine (raced it 2 times last summer) with no problems.
Make sure they are POSI!!!!!!!

LB9GTA
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Old Apr 11, 2004 | 12:57 PM
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From: Glen Allen, VA
Don't get Richmond if you don't want it to whine. I have motives and am happy with them. What plans do you have for the car and what trap speed are you expecting? Both will make a nice SOTP improvement.
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Old Apr 11, 2004 | 01:09 PM
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Black91Z28's Avatar
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From: Nebraska
Car: 1991 Camaro z28
Engine: 350 Tpi
Transmission: 700r4 Auto
well im kind of rebuilding (if u wanna call it that) my car 1 piece a year. Last year I rebuilt the tranny, this year the rearend, and next year im gonna do the engine..so im wondering what kind of gears would be worth my time. As far as the engine goes, im lookin to make around 450hp with prolly a range of 3000-6500 rpm if possible. I want something strong but nothing that will take my top speed to a grand total of around 105mph if u know what i mean. I dunno, im just confused right now
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Old Apr 11, 2004 | 10:01 PM
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From: Manitoba
Car: '91 GTA
Engine: 421sbc
Transmission: Powerglide
Axle/Gears: Ford 9" with 3.89
top speed

With the 2.73's, i used to have a top speed of about 140-145mph. Now with the 3.42's, about 115mph.

LB9GTA
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Old Apr 11, 2004 | 11:03 PM
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http://www.precisiongear.com


I use them, and I swear by them.
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Old Apr 12, 2004 | 12:00 AM
  #7  
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From: delaware
Car: 85 berlinetta
Engine: lg4
Transmission: 700r4
the real top speed limiter is hp.if you change to lower gears you might lose some top speed if you leave the motor stock.how many guys@ the track runnin 4.10, 4.56s and go way over 115. just match your rear to what mods you wanna do to the motor
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Old Apr 12, 2004 | 01:35 AM
  #8  
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From: MA
Car: 89 Camaro RS
Engine: LO3 305 TBI
Transmission: T5WC
Originally posted by twistydick
the real top speed limiter is hp.if you change to lower gears you might lose some top speed if you leave the motor stock.how many guys@ the track runnin 4.10, 4.56s and go way over 115. just match your rear to what mods you wanna do to the motor
With a T5 and 4.56s, your top speed would still be about 120. I dunno about the autos or a T56.... But with 450hp, I don't think many people would try their luck with a T5.
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