Diff upgrades or do i need new?
05-29-2014, 09:30 AM
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Car: 1986 Trans Am
Engine: 327 .030 over sbc
Transmission: wc t5
Axle/Gears: stock
Diff upgrades or do i need new?
hey guys i am in the process of building a 350. it will make 400+ hp with some spray. i have a t56 on the way to me right now. thre going into a 86 t/a. what i really want to know is what about my rear end. what upgrads do you guys recomend? or will it hold up to the drag racing i intend on using it for? I know there is a thread to explain some of this but im just looking for some advice from you guys. what you guys have learned over the years.
05-29-2014, 10:24 AM
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05-29-2014, 10:53 AM
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Re: Diff upgrades or do i need new?
I doubt that the rear end you have will make it very long. I would guess that the first time you put sticky tires on it and dump the clutch it will probably bust. A after market 12 bolt or 9 inch would be the way to go. Moser, Strange and some others make bolt in rear ends for your car.
05-29-2014, 01:11 PM
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Car: 1986 Trans Am
Engine: 327 .030 over sbc
Transmission: wc t5
Axle/Gears: stock
Re: Diff upgrades or do i need new?
I doubt that the rear end you have will make it very long. I would guess that the first time you put sticky tires on it and dump the clutch it will probably bust. A after market 12 bolt or 9 inch would be the way to go. Moser, Strange and some others make bolt in rear ends for your car.
05-29-2014, 03:21 PM
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Re: Diff upgrades or do i need new?
Take a look at this. http://www.hotrodders.com/forum/hill...ch-300274.html
05-30-2014, 02:50 AM
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Diff upgrades or do i need new?
I built a 10 bolt with some nice aftermarket parts.
That's worked out ok for a DD, automatic with street tires.
It cost me around 1,500.00 to do.
Don't waste your time or money on a 10 bolt upgrade with what you’re doing.
Defiantly a 9" or 12 bolt.
big gear head knows what he's talking about. Very experienced and Knowledgeable .
That's worked out ok for a DD, automatic with street tires.
It cost me around 1,500.00 to do.
Don't waste your time or money on a 10 bolt upgrade with what you’re doing.
Defiantly a 9" or 12 bolt.
big gear head knows what he's talking about. Very experienced and Knowledgeable .
Last edited by Ron U.S.M.C.; 05-30-2014 at 02:55 AM.
05-30-2014, 07:06 AM
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Car: 1986 Trans Am
Engine: 327 .030 over sbc
Transmission: wc t5
Axle/Gears: stock
Re: Diff upgrades or do i need new?
Take a look at this. http://www.hotrodders.com/forum/hill...ch-300274.html
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05-30-2014, 11:34 PM
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Diff upgrades or do i need new?
I just thought I would post a photo or two so you can get an idea why the 9" is preferred over the GM 7.5/7.65 Ring and Pinion for certain applications.
05-31-2014, 10:30 AM
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Car: 1986 Trans Am
Engine: 327 .030 over sbc
Transmission: wc t5
Axle/Gears: stock
Re: Diff upgrades or do i need new?
05-31-2014, 01:46 PM
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Diff upgrades or do i need new?
Some of the guys here can explain what’s needed and what is the least expensive way of putting together the parts necessary for the 9"
I say 9" over the 12 bolt because that seems to be the preferred choice here.
Just for kicks and giggles I have included my 10 bolt build.
It’s worked well for me but it’s my DD,5.0,auto,with street tires so its all I need.
https://www.thirdgen.org/forums/tran...de-photos.html
I say 9" over the 12 bolt because that seems to be the preferred choice here.
Just for kicks and giggles I have included my 10 bolt build.
It’s worked well for me but it’s my DD,5.0,auto,with street tires so its all I need.
https://www.thirdgen.org/forums/tran...de-photos.html
Last edited by Ron U.S.M.C.; 05-31-2014 at 02:24 PM.
05-31-2014, 04:12 PM
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Car: 1986 Trans Am
Engine: 327 .030 over sbc
Transmission: wc t5
Axle/Gears: stock
Re: Diff upgrades or do i need new?
Some of the guys here can explain what’s needed and what is the least expensive way of putting together the parts necessary for the 9"
I say 9" over the 12 bolt because that seems to be the preferred choice here.
Just for kicks and giggles I have included my 10 bolt build.
It’s worked well for me but it’s my DD,5.0,auto,with street tires so its all I need.
https://www.thirdgen.org/forums/tran...de-photos.html
I say 9" over the 12 bolt because that seems to be the preferred choice here.
Just for kicks and giggles I have included my 10 bolt build.
It’s worked well for me but it’s my DD,5.0,auto,with street tires so its all I need.
https://www.thirdgen.org/forums/tran...de-photos.html
With what i plan on doing with mine im leaning twards the 9 
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