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Making an 8.8 work

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Old Jun 27, 2014 | 03:30 PM
  #21  
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The tubes wont separate. Weld them to the diff if it worries you

Heres a ranger 28sp 8.8 with Fbody axle tubes and stock Fbody axles. I later updated the design from a pair of tubes to a solid piece of angle
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31sp explorer unit using two drivers side explorer axles. Pass tube extended via internal sleeve. 4"x5/16" angle from drivers tube for TA mount
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Sleeve. 10 bolt mounts were cut off a junk housing and welded on the 8.8. Will fabricate the brackets from scratch the next time. That sucked
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Old Jun 28, 2014 | 09:21 PM
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Very helpful. Thanks.

On the market for the axles now, build will start as soon as both are purchased. If anyone has an 8.8/10 bolt for sale or knows of one nearish to Michigan shoot me a pm. Thanks.

Last edited by jbrockwell; Jun 29, 2014 at 08:50 PM.
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Old Jun 30, 2014 | 06:52 AM
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Considering this for my car. It seems too good to be true. Why isnt this more popular?

Someone could make a killing off these.
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Old Jun 30, 2014 | 09:05 AM
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Originally Posted by nascarnate326
Considering this for my car. It seems too good to be true. Why isnt this more popular?

Someone could make a killing off these.
Welding is a huge setback for some people who don't have the resources. Most people who haven't done much fabrication before see this as overly complicated and risky (which it really isn't if you've used a drop saw and a tape measure before).

As far as why engineering companies such as moser/trick etc. don't sell these I'm not too sure, but if someone could get a good method down that had a quick completion time, I'm sure a good majority of tech members would line up.
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Old Jun 30, 2014 | 09:08 AM
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Once I'm done with mine and I write up a build thread (and if people are pleased and confident with the results) I'd have no problem making some for tech members. If I get supplied with the donor axle and the 8.8 I don't see why I couldn't make some for a few hundred dollars in labor.
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Old Jun 30, 2014 | 10:44 AM
  #26  
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I could see myself being down for something like that. The 8.8 seems strong enough that even if I went to an LS3 with a moderate street cam it would still be strong enough I should think.
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Old Jun 30, 2014 | 01:12 PM
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I want one that keeps 4ch ABS, stock e-brake cables, and stock width that dosent use the small 10 bolt axle bearings. I want to keep my wheels and not have to buy new ones. If someone has a formula for this I can cut and weld perfect and have all the shop tools to do it with.
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Old Jun 30, 2014 | 02:26 PM
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I don't know what you mean by the small axle bearings. That's usually not a major failure component.

Sounds like you might as well just get a 12 bolt, S60, or 9 inch if you're looking to beef everything up. The goal of this though is to just get a stronger center section (and maybe a higher spline axle set).
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Old Jun 30, 2014 | 08:48 PM
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Originally Posted by SparkyJJO
I don't know what you mean by the small axle bearings. That's usually not a major failure component.

Sounds like you might as well just get a 12 bolt, S60, or 9 inch if you're looking to beef everything up. The goal of this though is to just get a stronger center section (and maybe a higher spline axle set).
I read where the 10 bolt axle bearings would be the next weak link and thought it would be a good idea to address what would be the only remaining problem. My car had a bad axle bearing when I bought it 100% stock so I don't have too much confidence in them.
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Old Jun 30, 2014 | 09:06 PM
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Ah gotcha. I just figure axle bearings are like any bearing and can wear out, and really aren't that big a deal to replace every 100k miles or whatever (though they've lasted longer than that for me).
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Old Jul 1, 2014 | 05:47 PM
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Why not just use a 8.8 from the F150 ? The 10 bolt is 64.750 wide and a truck axle is 65.50 seems like the way to go.

Last edited by mikey4play; Jul 1, 2014 at 06:09 PM.
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Old Jul 3, 2014 | 08:17 AM
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Considering this for my car. It seems too good to be true. Why isnt this more popular?

Someone could make a killing off these.
Lots of liability with used axle parts. For a company, it'd cost about the same to build a fab9 as an 8.8. Who would shell out the same money for a weaker axle?

This is a budget axle, always has been. Throw a company fabbing them in and it's no longer a budget axle. Then you might as well go aftermarket

The f150 or any heavy truck axle is out. Look at the axle flange. If you can find a shop willing to red roll the lug pattern, the tulip is still too big. The explorer axle is the heaviest axle with the small flanges, but it's the small ford bolt pattern of 5 on 4.5"

IMHO, the only two routes I would consider would be:

Use 28sp car/ranger 8.8 and slide the 10 bolt axles/tubes in. 9/10 cars on this forum will not break this setup and it can be built for around $100. Weak link are the axles. 4ch abs is all stock parts, same brakes, everything

2) explorer 31sp 8.8 using two drivers side axles, extend the pass tube, fab new brackets, use ford brakes and 1.5" adapters for the wheels or run mustang wheels. Weak link is the differential

Do whatever you want for the TA mount. I prefer the wing from the drivers tube. Hiltys mount is solid, but requires disassembling the diff. If you can properly setup a gear pattern and properly weld cast, use his mount 100%. If you can't do both, use the wing
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Old Jul 5, 2014 | 09:32 PM
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Originally Posted by Pocket
Lots of liability with used axle parts. For a company, it'd cost about the same to build a fab9 as an 8.8. Who would shell out the same money for a weaker axle?

This is a budget axle, always has been. Throw a company fabbing them in and it's no longer a budget axle. Then you might as well go aftermarket

The f150 or any heavy truck axle is out. Look at the axle flange. If you can find a shop willing to red roll the lug pattern, the tulip is still too big. The explorer axle is the heaviest axle with the small flanges, but it's the small ford bolt pattern of 5 on 4.5"

IMHO, the only two routes I would consider would be:

Use 28sp car/ranger 8.8 and slide the 10 bolt axles/tubes in. 9/10 cars on this forum will not break this setup and it can be built for around $100. Weak link are the axles. 4ch abs is all stock parts, same brakes, everything

2) explorer 31sp 8.8 using two drivers side axles, extend the pass tube, fab new brackets, use ford brakes and 1.5" adapters for the wheels or run mustang wheels. Weak link is the differential

Do whatever you want for the TA mount. I prefer the wing from the drivers tube. Hiltys mount is solid, but requires disassembling the diff. If you can properly setup a gear pattern and properly weld cast, use his mount 100%. If you can't do both, use the wing
Using option 1, would a set of moser hardened axles for a fbody make this rear able to compete with the 12 bolt strength wise? Id like to see the revised angle mount you came up with if you have any. Where does it require welding to the chunk to avoid removing the gears vs Hitsy's mount? Do you make and sell the mount that you designed? if so P.M. me. Thanks.
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Old Jul 13, 2014 | 11:43 AM
  #34  
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Possibly, you're looking at $400 in axles though, so its not that appealing

I posted pics of the old and revised mounts. Old was two pieces of roll bar tubing, new was a single 5"x5/16" piece of angle. Both located the TA mount close to the snout and used 2"x1/4" steel stock to wrap a loop around the snout and bolt to the flange on the pass side. Point of the "wing" is to control the up/down forces from the axle. The strap controls the L/R of the TA attempting the fish tail under load. All welding is done on the drivers mild steel axle tube, not the cast diff

I do not sell anything for the axle. The parts are simple to make
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Old Jul 14, 2014 | 06:47 AM
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Cant see the pics.
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Old Jul 31, 2014 | 11:39 AM
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Update:

Broken clutch slave cylinder bleed valve had my spare time tied up lately. Everything is ok now and the rear end project resumes. I'm having some trouble locating an ideal donor axle (10bolt or 8.8) and that seems to be my only remaining obstacle. I'm following up a lead this weekend that might land me the 8.8.

A build thread will be started as soon as both axles are purchased and begin to be cut apart.
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Old Jul 31, 2014 | 11:46 AM
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Originally Posted by jbrockwell
Update:

Broken clutch slave cylinder bleed valve had my spare time tied up lately. Everything is ok now and the rear end project resumes. I'm having some trouble locating an ideal donor axle (10bolt or 8.8) and that seems to be my only remaining obstacle. I'm following up a lead this weekend that might land me the 8.8.

A build thread will be started as soon as both axles are purchased and begin to be cut apart.
Good to know. I will either be buying a s60 or going the 8.8 route as the 9" is too expensive.
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Old Jul 31, 2014 | 04:52 PM
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One of the advantages of the 8.8 center/r&p for those of us who road race/open track their f bodies is that there is a STRONG version of the very high bias, Torsen T2R diff available for these (through FRPP).

Whereas the version for the 7.5 10 bolts has a very weak case and is prone to cracking.

This diff is NOT made for 9" or S60s of ANY kind/company.
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Old Aug 6, 2014 | 09:10 AM
  #39  
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10 bolt purchased w/ panhard and springs for $60. I'm heading over to a junkyard today to check out an 8.8. They said if they have one it will be $100.

Cost to build:

10 bolt donor: $60
8.8" full assm: $100
Flange yoke: ~$20
Materials: ~$20
__________________________
Total so far: $200


Not bad considering it will be a major leap above the 10 bolt towards the strength of a 9" or 12 bolt.
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Old Aug 6, 2014 | 09:42 AM
  #40  
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Also stumbled across this. Just about filled in all the missing links.

http://www.therangerstation.com/tech...8_8-axle.shtml
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