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

gear ratio swap

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Old Jun 5, 2016 | 11:42 PM
  #1  
w41duvernay's Avatar
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From: Washington D.C. area
Car: 1986 Pontiac Firebird s/e
Engine: 305 Chevy
Transmission: 700r4
Axle/Gears: 2.77 for now
gear ratio swap

Sirs,
I need to find someone here who would be willing to do a gear ratio swap on my 86 firebird s/e 5.0l soon. I did get an offer from someone on this forum in Baltimore in D.C. I got 2.77/3.08s in the 86 stock, and I want to got to 3.42s, and I only need to get an installation kit from Drivetrain.com.
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Old Jun 6, 2016 | 07:07 AM
  #2  
big gear head's Avatar
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Re: gear ratio swap

It would be helpful to know where you are. It would also be helpful to know which rear end you have. It could be the 7.5 10 bolt or the Borg Warner 9 bolt.


If you want a cheap kit that is still worth having (assuming that you have the 10 bolt)then get the USA Standard kit from Quick Performance or Summit.
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Old Jun 6, 2016 | 01:15 PM
  #3  
w41duvernay's Avatar
Thread Starter
Junior Member
 
Joined: Nov 2011
Posts: 71
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From: Washington D.C. area
Car: 1986 Pontiac Firebird s/e
Engine: 305 Chevy
Transmission: 700r4
Axle/Gears: 2.77 for now
Re: gear ratio swap

Originally Posted by big gear head
It would be helpful to know where you are. It would also be helpful to know which rear end you have. It could be the 7.5 10 bolt or the Borg Warner 9 bolt.


If you want a cheap kit that is still worth having (assuming that you have the 10 bolt)then get the USA Standard kit from Quick Performance or Summit.
Im in the Washington D.C. area. It's the 7.5 10 bolt.

Last edited by w41duvernay; Jun 6, 2016 at 01:17 PM. Reason: Forgot
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Old Jun 6, 2016 | 02:19 PM
  #4  
big gear head's Avatar
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Re: gear ratio swap

Originally Posted by w41duvernay
Im in the Washington D.C. area. It's the 7.5 10 bolt.
Who are you? AspenW41 started this thread.
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Old Jun 6, 2016 | 02:58 PM
  #5  
w41duvernay's Avatar
Thread Starter
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Joined: Nov 2011
Posts: 71
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From: Washington D.C. area
Car: 1986 Pontiac Firebird s/e
Engine: 305 Chevy
Transmission: 700r4
Axle/Gears: 2.77 for now
Re: gear ratio swap

Same guy. I didn't realize a had 2 address in here.
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Old Jun 6, 2016 | 03:04 PM
  #6  
big gear head's Avatar
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Re: gear ratio swap

I'm not able to help you much due to your location, but I can give some advice. There are 3 installation kits that I can recommend, Tom's Differentials, Yukon and USA Standard. All of the others that I have used are junk. I have not used one from Drivetrain.com, but I have used just about every other one that is made and other than the 3 that I listed they are all junk.


Do you have a set of gears yet? If you do, what brand are they?
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Old Jun 6, 2016 | 03:07 PM
  #7  
w41duvernay's Avatar
Thread Starter
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Joined: Nov 2011
Posts: 71
Likes: 0
From: Washington D.C. area
Car: 1986 Pontiac Firebird s/e
Engine: 305 Chevy
Transmission: 700r4
Axle/Gears: 2.77 for now
Re: gear ratio swap

Found the original private message! It was on the other post.
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