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Old 12-06-2012, 09:04 PM   #1
stevelknievel
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9 inch + 35s

wasnt sure where to put this. ive acquired a 9 inch to replace my 8.8. id like to lock it and have been considering a spool or even lincoln locking it. its a 28 spline rear end and im currently running 35x12.50s (plan to for awhile too), how should it hold up? im not super hard on my truck but it definitely gets used
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Old 12-06-2012, 09:11 PM   #2
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Might hold up if you can keep your foot out of it. but you wont have a vss to control your speedo or abs. Also affects shift points in an automatic. There is a company that sells a vss relocation kit to move it to the rear output on the tcase but i belive its $300. So you have to ask if its worth it at that point.
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Old 12-06-2012, 09:15 PM   #3
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Might hold up if you can keep your foot out of it. but you wont have a vss to control your speedo or abs. Also affects shift points in an automatic. There is a company that sells a vss relocation kit to move it to the rear output on the tcase but i belive its $300. So you have to ask if its worth it at that point.
Sorry forgot to mention my vss has already been relocated as the 8.8 I had to hastily had to swap in during the summer had no vss
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Old 12-06-2012, 09:33 PM   #4
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Old 12-06-2012, 09:36 PM   #5
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go with a real locker locker for the rear if you drive it on the street like a detroit locker or a yukon grizzly locker.
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Old 12-06-2012, 10:06 PM   #6
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I'm currently trying to get my hands on a second vehicle so the truck wouldn't be a main dd but if the budget allows I would prefer a real locker, main question is durability
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Old 12-06-2012, 10:17 PM   #7
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I'm currently trying to get my hands on a second vehicle so the truck wouldn't be a main dd but if the budget allows I would prefer a real locker, main question is durability

Like U can hurt it with your engine ?????
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Old 12-06-2012, 10:20 PM   #8
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Id find a locker and some 31 splines. That would be much better then lincoln locking and 28's. if it was me id pull a pumpkin and axles from a yard with 31 splines. Did you use a relocation kit or use a transfer case with vss? Im curious because i swapped in an older tcase that has the vss in it and wondered what needed to be done if i went this route.
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Old 12-06-2012, 10:30 PM   #9
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Id find a locker and some 31 splines. That would be much better then lincoln locking and 28's. if it was me id pull a pumpkin and axles from a yard with 31 splines. Did you use a relocation kit or use a transfer case with vss? Im curious because i swapped in an older tcase that has the vss in it and wondered what needed to be done if i went this route.
That would be ideal if time/money allows otherwise i just toss it in as is. And I used a relocator kit to just move the vss
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Old 12-06-2012, 11:14 PM   #10
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Your 8.8 in there is probably stronger than that 9 inch with 28 splines. Why do you want to change it? What did the 9" axle come out of?
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Old 12-06-2012, 11:19 PM   #11
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Your 8.8 in there is probably stronger than that 9 inch with 28 splines. Why do you want to change it? What did the 9" axle come out of?
Um No!! Axle bearing suck on a 8.8.

Only down side is HIGH HP draw on the 9" and not rab compatible.....

8.8 is a MUSTANG rear MADE to fit a truck.
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Old 12-06-2012, 11:23 PM   #12
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9 inch is out of a older fsb so it's a easy swap and I like the idea of a removable 3rd member the extra strength and no c clips
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Old 12-06-2012, 11:43 PM   #13
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Quote:
Originally Posted by JBfab View Post
Id find a locker and some 31 splines. That would be much better then lincoln locking and 28's. if it was me id pull a pumpkin and axles from a yard with 31 splines. Did you use a relocation kit or use a transfer case with vss? Im curious because i swapped in an older tcase that has the vss in it and wondered what needed to be done if i went this route.
i always wondered that but ive heard that the signal is different. would be a nice alternative.

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Um No!! Axle bearing suck on a 8.8.

Only down side is HIGH HP draw on the 9" and not rab compatible.....

8.8 is a MUSTANG rear MADE to fit a truck.
most mustangs/rangers use a 7.5" axle or a 28 spline 8.8. stock 31 spline 8.8 is stronger than stock 9". the aftermarket for the 9" is huge tho
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Old 12-06-2012, 11:49 PM   #14
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i always wondered that but ive heard that the signal is different. would be a nice alternative.



most mustangs/rangers use a 7.5" axle or a 28 spline 8.8. stock 31 spline 8.8 is stronger than stock 9". the aftermarket for the 9" is huge tho

Really ?? are U a true Ford fan??

Boy I have owned many Mustangs and never found a 7.5 behind a V8 past 85................


Hell I have 03-04 Cobra 8.8 pumpkin center in the basement.......


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Old 12-06-2012, 11:53 PM   #15
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I'm running 36" swampers 9" with a Detroit drive it on the street a lot and wheeled it hard with no issues of yet. broncograveyard is doing a 10% off special right now on items they sell. I bought my Detroit there and was about the cheapest anywhere.
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Old 12-07-2012, 12:00 AM   #16
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Wouldn't really consider it an "upgrade".

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Old 12-07-2012, 12:02 AM   #17
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8.8

Quote:
Originally Posted by ProBronco View Post
Um No!! Axle bearing suck on a 8.8.

Only down side is HIGH HP draw on the 9" and not rab compatible.....

8.8 is a MUSTANG rear MADE to fit a truck.
I admit the 8.8 axle bearings with C clips suck but a 31 spline 8.8 will be stonger than a 9 inch with 28 splines.

The more HP draw of a 9" is only something to worrry about if you need that last .02 second in a drag race.

And actually the 8.8 came out for 1983 trucks so it is a truck axle made to fit a Mustang.
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Old 12-07-2012, 12:06 AM   #18
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Originally Posted by stevelknievel View Post
9 inch is out of a older fsb so it's a easy swap and I like the idea of a removable 3rd member the extra strength and no c clips
Are you sure it's a 28 spline? I have pulled apart a lot of 1973 up truck axles and the only 28 spline ones I have seen are the 4.5" bolt pattern ones in early 80's F100's.
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Old 12-07-2012, 12:11 AM   #19
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Are you sure it's a 28 spline? I have pulled apart a lot of 1973 up truck axles and the only 28 spline ones I have seen are the 4.5" bolt pattern ones in early 80's F100's.
99% sure its a 28 spline

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i always wondered that but ive heard that the signal is different. would be a nice alternative.



most mustangs/rangers use a 7.5" axle or a 28 spline 8.8. stock 31 spline 8.8 is stronger than stock 9". the aftermarket for the 9" is huge tho
dont want to start a pissing match regarding strength or what came in what, but you also hit the nail on the head, ive got more options with a 9 inch than a 8.8
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Old 12-07-2012, 12:24 AM   #20
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I admit the 8.8 axle bearings with C clips suck but a 31 spline 8.8 will be stonger than a 9 inch with 28 splines.

The more HP draw of a 9" is only something to worrry about if you need that last .02 second in a drag race.

And actually the 8.8 came out for 1983 trucks so it is a truck axle made to fit a Mustang.
U got me on that, my 98 F150 had the 8.8


So trucks have more torque and mustang have more hp. So how is it a bad rear ??? C clips maybe.....


Not sure on how splines have anything to do with it..................
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