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

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Old 04-12-2010, 02:37 AM   #1
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Join Date: Nov 2006
Location: NY
Posts: 1,696
Car: 89' IROC , 84' Corvette,96' Caprice
Engine: Vortec 357, LT1, L99
Transmission: T-56, T-56, 4L60e
Axle/Gears: 3.23 POSI , 3.08 POSI, 2.93 Open

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3.73's or 4.10's
I am looking to upgrade my gears in the rear. I am currently running 3.23's and the car doesn't pick up until 3000-3500 rpm's(and it really picks up then). So i was looking into 4.10's until i started reading that ppl with 10 bolts breaking the 4.10's... and i am now looking into 3.73's. The car barely sees highway use and i just cruise around a lot around 50-60 mph which in 6th gear is pretty low(it doesn't like anything under 50 mph in 6th, no power) What do you think is a good gear for the car? The powerband is roughly about 3500-6500. Thanks a lot.
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1984 Corvette-LT1/T-56 swap,cc503, 30lb bosch III's, LT's, intake.
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Old 04-12-2010, 08:14 AM   #2
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Join Date: Dec 2004
Location: Lincolnton, NC
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Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73

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Re: 3.73's or 4.10's
4.10s are very popular with the 6 speed crowd
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Old 04-13-2010, 08:53 PM   #3
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Join Date: Nov 2006
Location: NY
Posts: 1,696
Car: 89' IROC , 84' Corvette,96' Caprice
Engine: Vortec 357, LT1, L99
Transmission: T-56, T-56, 4L60e
Axle/Gears: 3.23 POSI , 3.08 POSI, 2.93 Open

Classifieds Rating: (0)
Re: 3.73's or 4.10's
Quote:
Originally Posted by 3rdgenmaro View Post
4.10s are very popular with the 6 speed crowd

Thanks for the input.
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Old 04-13-2010, 09:04 PM   #4
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Location: Norfolk, VA. USA
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Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5

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Re: 3.73's or 4.10's
I had 4.10's in 3 cars and they are great for a 6 speed.
they were fun in my 5 speed Formula but gas mileage sucked due to no extra over drive gear.
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Old 04-13-2010, 09:21 PM   #5
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Join Date: Dec 2006
Location: Vernon CT
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Car: 88 IROC-Z
Engine: 383
Transmission: T56
Axle/Gears: 4th gen 3.42posi

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Re: 3.73's or 4.10's
Who buys a camaro/firebird for gas milage anyway. go 4.10
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Old 04-14-2010, 01:07 AM   #6
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Join Date: Nov 2006
Location: NY
Posts: 1,696
Car: 89' IROC , 84' Corvette,96' Caprice
Engine: Vortec 357, LT1, L99
Transmission: T-56, T-56, 4L60e
Axle/Gears: 3.23 POSI , 3.08 POSI, 2.93 Open

Classifieds Rating: (0)
Re: 3.73's or 4.10's
Quote:
Originally Posted by 383fbod View Post
Who buys a camaro/firebird for gas milage anyway. go 4.10

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Old 04-14-2010, 01:42 AM   #7
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Join Date: Feb 2002
Location: PENDLETON, NY
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Car: 1985 T/A
Engine: 355 TPI
Transmission: T-5
Axle/Gears: 3.42

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Re: 3.73's or 4.10's
def 4.10, where have a 95 impala with 4.10 and there are not bad at all and take the car everywhere
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Old 04-14-2010, 01:42 AM
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