8.8' Rear end vs. 9" rear end - Forums at Modded Mustangs
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post #1 of 23 Old December 17th, 2006, 05:46 PM Thread Starter
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8.8' Rear end vs. 9" rear end

I'm looking to change out my 8" rear end in the next couple of months. I've heard that the Ford 9" rear end is one of the most durable rear ends ever made. I'm looking to run a 3.73 gear, and wanted to know if there was any benefit to going to an 8.8" rear end......beside the fact that they are more plentiful.

Also, are there any modifications needed if I swapped my 8" for either the 9" or the 8.8" rear end.

Thanks,

Jeff
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post #2 of 23 Old December 18th, 2006, 03:10 AM
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Why do you want to get rid of the 8"? I wouldn't change it unless you are making alot of horsepower. I know first hand those 8" rear ends will handle a good amount of power in stock form. Are you sure its an 8"? They are very similar to a 9" too with a drop out center section.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


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post #3 of 23 Old December 18th, 2006, 06:30 AM
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You can get a bolt on 9" for about $600 at the junkyard. A 9" is easy to swap gears. If yo want a 9", get a a lincoln Versailles rearend. I am guess it will fit you car not knowing what it is.

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post #4 of 23 Old December 18th, 2006, 09:22 PM
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just go to http://currieenterprises.com/ and check these rear ends out

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post #5 of 23 Old December 19th, 2006, 11:20 PM
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Doesn't the 8" rear end swap gears just like the 9"?

Insert multiple sarcastic smilies throughout my post

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post #6 of 23 Old December 20th, 2006, 01:11 PM
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Quote:
Originally Posted by 69fastback
Doesn't the 8" rear end swap gears just like the 9"?
Yes

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


***1988 Mustang GT - Stock....almost
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post #7 of 23 Old February 24th, 2007, 02:58 PM
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Versailles rear ends are nice if you can find them, 9" with disc brakes. I picked mine up in the salvage yard for $125 ready to bolt in. It came with a Trac Loc too! 67-70 Mustang rear ends are all interchangeable. If you happen to have any of those years its worth knowing. 65-73 Bronco rear ends are the same width as a versailles rear but take more to get bolted under a Mustang.

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post #8 of 23 Old August 13th, 2008, 02:29 AM
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Dos anyone know what axles are interchangeable

Dos anyone know what axles are interchangeable with the 2001 mustangs or better what cars use the 8.8 or 9 axle that would fit the 2001
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post #9 of 23 Old August 13th, 2008, 08:58 AM
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Dos anyone know what axles are interchangeable with the 2001 mustangs or better what cars use the 8.8 or 9 axle that would fit the 2001
You might want to ask in this forum

99-04 Forum
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post #10 of 23 Old August 13th, 2008, 09:55 AM
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the 8 inch and the 9 inch lool alike.both will take a lot of punisment.if you are not punching 600 hp,leave the 8 in there and build it.

i sixing 200 six with 300 hp.
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post #11 of 23 Old August 17th, 2008, 12:56 PM
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The 8 inch is a decent rear-end. But there's no breaking a Ford 9 inch. If you do, I'll buy you a new one. Lol.
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post #12 of 23 Old October 20th, 2008, 02:23 PM
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I saw a nine inch broke once, it was shattered in the back. It was a 65 fastback with what I was told original 289 dbl 4 barrel carbs on racing slicks.

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post #13 of 23 Old October 20th, 2008, 02:26 PM
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Originally Posted by 69fastback View Post
Doesn't the 8" rear end swap gears just like the 9"?
Yes both rear ends have pumpkins that can be switched out. It is a beautiful thing for race day.

Race what ya Brought
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post #14 of 23 Old October 20th, 2008, 02:29 PM
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The 9 inch is one of the best rear ends ever made. It is the basis for most racing rear ends used today. If you get one for your car it will bolt right in without any modifications for the most part. As long as you get a basic one for your car there are no mods.

Race what ya Brought
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post #15 of 23 Old March 25th, 2011, 01:38 PM
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Waay old, but how does the cost and availability of the 8" compare to the 9"?

I imagine 9" are getting hard to get cheap in the yards.
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post #16 of 23 Old March 25th, 2011, 02:05 PM
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Why didn't you just make new thread to ask that?

Old Mustang 8" are a lot more plentiful that a old Mustang 9"

The 8" came in everything with a 289 or 302 in it. Witch most of all of them had.

The 9" came in only high performance Mustangs with 351 or bigger.

8" not rebuilt is $250, 9" not rebuilt is $350 to $450 when you can find them.

you can find 9" in trucks and bigger old 70's cars but they are about 2" wider.
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post #17 of 23 Old March 25th, 2011, 02:57 PM
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Quote:
Originally Posted by 460brevill View Post
the 8 inch and the 9 inch lool alike.both will take a lot of punisment.if you are not punching 600 hp,leave the 8 in there and build it.
600 is a lot, is this a good figure?
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post #18 of 23 Old March 26th, 2011, 10:56 AM
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I have a 9" from a Lincoln in my mustang, I did it for the disc brakes and the posi rear end. If I had to do it over again I would stick to the 8" because on a light car like the Mustang if your not pushing out a lot of hp it seems to be too much un-sprung weight and the car does not handle as nimble
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post #19 of 23 Old March 26th, 2011, 12:40 PM
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600 is a lot, is this a good figure?

??? 600 for what? HP, Cost?

8", 9", Rebuilt? Not rebuilt?

Is the question will a 8" hold 600 HP? Built yes. Without Drag slicks.

A 9" is a Lot better though.
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post #20 of 23 Old April 24th, 2011, 10:41 PM
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What years did the late models use an 8.8 rear, or are they still using them, and what are they rated for in HP and TQ?
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