9 inch + 35s

[stevelknievel]

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

[JBfab]

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.

[stevelknievel]

Originally Posted by JBfab

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

[sackman9975]

If you drive it everyday, you won't like having the rear "locked".

[f150inline]

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.

[stevelknievel]

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

[ProBronco]

Originally Posted by stevelknievel

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 ?????

[JBfab]

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.

[stevelknievel]

Originally Posted by JBfab

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

[bluebolt]

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?

[ProBronco]

Originally Posted by bluebolt

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.

[stevelknievel]

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

[Kingfish999]

Originally Posted by JBfab

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.

Originally Posted by ProBronco

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

[ProBronco]

Originally Posted by Kingfish999

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.......


The Stang Master

[379sinvb]

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.

[Robs79BBbronco]

Wouldn't really consider it an "upgrade".

Sent from my XT603

[bluebolt]

Originally Posted by ProBronco

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.

[bluebolt]

Originally Posted by stevelknievel

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.

[stevelknievel]

Originally Posted by bluebolt

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

Originally Posted by Kingfish999

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

[ProBronco]

Originally Posted by bluebolt

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..................