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Old 08-23-2008, 10:15 AM   #1
nelapse
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4th Gen 10 bolt or 3rd gen 9 bolt

I have two cars I am consolidating into one.

I have an LS1 rear end 10 bolt. and one 87 GTA 9 bolt.

Which one should I use and why?
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Old 08-23-2008, 10:30 AM   #2
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

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Old 08-23-2008, 11:33 AM   #3
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

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I did, didn't find the input I was looking for.
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Old 08-23-2008, 02:15 PM   #4
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

well aftermarket support for a 9bolt is slim, while the 10 bolt is plentiful, the 4gen ten bolt as you may know has a wider track width so wheels may become a concern, and the 9bolt is a "direct " replacment of the axle you have already, well the 4th gen is too but its overal 3 inches wider i belive so. theres your options.
9 bolts you will get mixed emotions over how much power they can take etc. but its in preferance, i say the 4gen rear just because there is more of an aftermarket for it, and you can run the fancy 4 gen wheels too.....

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Old 08-24-2008, 12:17 AM   #5
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

I would go with the 9 bolt as it's made for our 3rd gens. I just rebuilt mine and it was very easy and only cost me about $300.

The 4th gen sticks out a couple inchs.

You might even want to try and sell them both and locate a 3rd gen 10 bolt. Stuff some 28 splines and a zexel in it.
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Old 08-26-2008, 07:30 PM   #6
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

Depends on the wheels you are using if you use the 4th gen wheels the ls1 10 bolt will be the best option. If you use the stock third gen wheel use the 9 bolt. The 2 inches on each side looks retarded if you ask me.
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Old 08-26-2008, 07:54 PM   #7
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

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Depends on the wheels you are using if you use the 4th gen wheels the ls1 10 bolt will be the best option. If you use the stock third gen wheel use the 9 bolt. The 2 inches on each side looks retarded if you ask me.
Really? I really get tired of people spouting off with negative comments, when they really have NO CLUE as to FACTS & are just assuming the extra 2" will cause a problem.

It gets old posting this pic, to show people they don't know what they are talking about....This car (with a 4th gen rear axle & stock wheels) looks retarded? I'd say it's a perfect fit.

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Old 08-26-2008, 09:36 PM   #8
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

I also was in the same boat. Whether to spend $300 on a rebuild, or to buy a used 4th gen 10 bolt. I ended up rebuilding mine. Glad I did. I Packed in the shims tight so now they act almost like a locker. It is a very easy set up also.

Do either of them have disk brakes? If so I would take that. Is the 9 bolt a 2 or 3 series carrier?
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Old 08-27-2008, 10:10 AM   #9
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

I would go with the LS1 rear. Better LSD, much better brakes and better aftermarket support. Only thing that is kind of a pain in the butt is making e brake cables work, but that is doable in an afternoon if your patient
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Old 08-28-2008, 04:31 PM   #10
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

what would be better between an LT1 rear and an LS1 rear? i noticed Hawk's has both available for the same price and was wondering what the differences are
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Old 08-28-2008, 05:02 PM   #11
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Re: 4th Gen 10 bolt or 3rd gen 9 bolt

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what would be better between an LT1 rear and an LS1 rear? i noticed Hawk's has both available for the same price and was wondering what the differences are

LS1 rears are the better of the 2, better LSD and larger brakes with an internal drum style e brake making them much easier to deal with.
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