Rear end fortification suggestions

[wbt]

How would it have prevented it? Where can I go to learn more about this? I know slicks and hrd launches like to snap things, which things I would like to larn about to reinforce. "1pc alum DS and rear end" seem to be what people say...but I want to learn how and why.

Would this work with the Fays2 Watts Linkage?

I'm trying to build a AutoX and Strip beast.

When you mount stickies on a car, the traction gained with a high RPM launch caused the axle tube to flex forward. This puts stress on the differential and bearing caps.

To counter this, a rear girdle will protect the bearing caps from flexing and the axle tube brace will prevent the tubes from flexing forward causing stress on the differential and leading to breakage. Spider gears seem to take the brunt of it.

Hope that helps!

 

[KonaGT]

What has changed with these rearends compared to the 8.8 out of the older Fox body Mustangs? Why do they need so much work?

I used to race mine with a stock housing, no braces, no girdles, stock caps, stock bolts, stock cover, axle tubes not welded, etc...On slicks cutting 1.4x 60' times with no problems. I had 33 spline axles and a spool.

 

[luillo]

I got the girdle from JPC and the axle tube brace from a vendor here who had purchased and decided not to use.

Total I paid about the same as the package deal from CHE directly:
http://www.cheperformance.com/CartGenie/prod-258.htm

Here is the pic I posted from before:

Just for curiosity using these CHE part would not let me use the Steeda
Extreeme launch brace right??? because of those tubes running to the side i will not be able to weld the tabs and install the steeda peace right???

 

[wbt]

Just for curiosity using these CHE part would not let me use the Steeda
Extreeme launch brace right??? because of those tubes running to the side i will not be able to weld the tabs and install the steeda peace right???

Not sure. I haven't looked into it much.

 

[GeorgeInNePa]

Just curious, but how does that CHE brace stop the axle tubes from flexing fore and aft? It sees as though that would be more effective for up/down.

I'm used to seeing bolt on back braces that work with the rear girdle/cover.

 

[Liftedbronco]

The che brace IMO is a bunch of hooey. As stated above, theyve been racing on 8.8's forever and no one uses that ricer crap. The only reason you think you need it is cuz they sell it and its bolt on.

Look at BBR, and all the other shops race cars. Do they use axle braces? no. Girdle, absolutley, I have one. Weld your axle tubes for extra safety. But i can tell you i didnt even do that and i was at 500whp for 2 years and 30k miles. My rear is just fine.

 

[beefcake]

i've got a jegs thicker cover and welded my axle tubes. i think on an automatic car that will be fine.

i have run the axle braces before on stick cars. it's a nice piece.

 

[wbt]

Just curious, but how does that CHE brace stop the axle tubes from flexing fore and aft? It sees as though that would be more effective for up/down.

I'm used to seeing bolt on back braces that work with the rear girdle/cover.

The brace forms a supporting triangle between the front of the rear end housing and the end of the axles. It is very solid and will prevent the tubes from flexing forward.

The che brace IMO is a bunch of hooey. As stated above, theyve been racing on 8.8's forever and no one uses that ricer crap. The only reason you think you need it is cuz they sell it and its bolt on.

Look at BBR, and all the other shops race cars. Do they use axle braces? no. Girdle, absolutley, I have one. Weld your axle tubes for extra safety. But i can tell you i didnt even do that and i was at 500whp for 2 years and 30k miles. My rear is just fine.

You have no idea what you are talking about. I use a brace on every car I run at the track with a solid axle. Hundreds of passes on the stock differential with slicks. No issues.

Welding your axle tubes is not going to prevent flex causing deflection, premature wear and failure of the differential. JPC has a kit, LPW has a kit, CHE has a kit, etc...

If you want to play with fire then so be it. Don't post a thread whining when you break your rear. It will happen.

I would rather have piece of mind knowing I can drive to the track, run and drive home without failure.

 

[beefcake]

The brace forms a supporting triangle between the front of the rear end housing and the end of the axles. It is very solid and will prevent the tubes from flexing forward.



You have no idea what you are talking about. I use a brace on every car I run at the track with a solid axle. Hundreds of passes on the stock differential with slicks. No issues.

Welding your axle tubes is not going to prevent flex causing deflection, premature wear and failure of the differential. JPC has a kit, LPW has a kit, CHE has a kit, etc...

If you want to play with fire then so be it. Don't post a thread whining when you break your rear. It will happen.

I would rather have piece of mind knowing I can drive to the track, run and drive home without failure.

On a stick car with big power, i definately think it will help. that, combined with welding your axle tubes will help.

I can tell you. My 08 gt500, i bent axles, my 04 mystic cobra, i bent axles. strange on top of that.

when i put the 04 rear end back together, i had it straightened, welded, and the che brace. never had another problem.

 

[D98GT]

So a better cover such as http://www.uprproducts.com/mustang-rear-end-stud-girdle.html wouldn't be a bad idea? I wouldn't had figured that it would make much difference?

 

[beefcake]

So a better cover such as http://www.uprproducts.com/mustang-rear-end-stud-girdle.html wouldn't be a bad idea? I wouldn't had figured that it would make much difference?

a good cover is always a good idea

 

[D98GT]

Can't go wrong with some cheap insurance then; I'll add it to my small wishlist

 

[wbt]

What has changed with these rearends compared to the 8.8 out of the older Fox body Mustangs? Why do they need so much work?

I used to race mine with a stock housing, no braces, no girdles, stock caps, stock bolts, stock cover, axle tubes not welded, etc...On slicks cutting 1.4x 60' times with no problems. I had 33 spline axles and a spool.

Weight and power are the major differences. Both combined put a ton more stress on the drivetrain when coupled with traction.

 

[beefcake]

Weight and power are the major differences. Both combined put a ton more stress on the drivetrain when coupled with traction.

yep, these cars are pigs

 

[KonaGT]

Weight and power are the major differences. Both combined put a ton more stress on the drivetrain when coupled with traction.

I was making 600hp NA and launching at 5500 off the transbrake at 3200lb race weight.

But these cars need a bunch of bracing and girdles at 450-550hp at 3800lb?

Im not trying to call anyone wrong or call anyone out, I just want to learn before I make a costly mistake.

 

[GeorgeInNePa]

The brace forms a supporting triangle between the front of the rear end housing and the end of the axles. It is very solid and will prevent the tubes from flexing forward.

Ok, I Googled some pics and see now that the arms angle forward, towards the pinion.

I've only seen rear views of it. It looked like the arms went parallel to the axle tubes.

 

[wbt]

Ok, I Googled some pics and see now that the arms angle forward, towards the pinion.

I've only seen rear views of it. It looked like the arms went parallel to the axle tubes.

Gotcha. My pic is a bit deceiving.

Here is a pic from their site:

http://www.cheperformance.com/CartGenie/image.asp?pid=315

 

[Liftedbronco]

The brace forms a supporting triangle between the front of the rear end housing and the end of the axles. It is very solid and will prevent the tubes from flexing forward.



You have no idea what you are talking about. I use a brace on every car I run at the track with a solid axle. Hundreds of passes on the stock differential with slicks. No issues.

Welding your axle tubes is not going to prevent flex causing deflection, premature wear and failure of the differential. JPC has a kit, LPW has a kit, CHE has a kit, etc...

If you want to play with fire then so be it. Don't post a thread whining when you break your rear. It will happen.

I would rather have piece of mind knowing I can drive to the track, run and drive home without failure.

Can you prove that? Then leave the personal attacks out of your replies please. Im not looking to fight wiht anyone.

 

[wbt]

Can you prove that? Then leave the personal attacks out of your replies please. Im not looking to fight wiht anyone.

If you look at the pics you will see the triangulation discussed.

 

[Liftedbronco]

It makes sense how it works. I shouldnt have called it ricer crap, that was just inflamatory. Regardless, ive had 500/500 for 2 years and nearly 30k daily driven miles. Been to the track for probably a dozen runs on small ish drag radials. I guess there could be a wear issue there from the flex, but it seems negligable to me.

Id actually have a great laugh at myself if I break my rear. Wouldnt be the first time ive put my foot in my mouth. Ill definitley post up though if it happens.