IRS Differential Cover Brace

98lincmk7lsc

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I had a ton of free time at work today, so I set out to do something I've been wanting to do for a long time. I made myself an IRS brace. I'll probably never really "need" one, but I figure I should make one now, while I've got all of this machinery and tools at my disposal, just in case.
I looked at a bunch of pics of braces that different companies offer and also at LVC member "Right on the Mark"s brace that he made. Ultimately, I chose this design...

I wish I could have taken a bunch of pics as I built it, but cameras and cell phones are not allowed on site where I work, so that wasn't an option.

I had taken the cover to my spare differential in to work to clean up and sandblast prior to installing the new 4.10's and brand new Trac-loc. While it was there, I figured now was a great time to make my cover brace...

First, I made a (very crappy, lol) template out of some aluminum sheet metal. I cut out the shape it needed to be and transfer-punched the holes where the bolts go. Once I was satisfied with the template, I stenciled it onto a 1/4" carbon steel plate, and cut out the lines with the plasma cutter. As it turns out, I'm not too steady with a plasma cutter torch, so it looked like ass, lol.
I then went and cleaned up all the edges on the big-ass pedestal grinder we have. I cleaned up the inside center edge on the mill since I knew I would be welding the cross brace there and wanted a nice edge.
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Next, spacers were needed for the bolt holes, so I grabbed some thick-walled pipe from the pipe rack and cut out 6 1-inch spacers on the lathe and TIG-welded them in their required locations. Once I finished that, I mocked it up onto the diff cover and measured out the cross brace pieces and cut them out on the big-ass metal shear.
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Before I welded the cross braces on, I drilled out the hole for the fill/drain plug, also on the mill. Once that was done, I TIG-welded the cross braces on and fit it up to the diff cover.
The last step was to go over all of the edges and welds with a grinder to smooth them all down and get rid of sharp edges and stuff.
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I think it came out pretty good. It's not the prettiest IRS brace out there. I could make it look better, but it's gonna be underneath the car where no one will ever see it again, so I think it's probably good enough as it is. I'm at least going to paint it, but I may get it powdercoated if I can think of anything else I need to get done at the same time.

Hope you enjoyed my super-long post! lol.

Here it is on the diff cover...
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Cool beans. I dont have the tools or skills so I will have to buy a Mustang one some time down the road.
 
Yeah, it's really gonna suck when I don't have all of this equipment at my disposal any more. I get out of the Navy in October...
 
Cool deal. Im running an LPW girdle cover on mine with arp stainless bolts, looks great.
 
Most definitely. There's some real expensive ones but the LPW is affordable and with the amount of money i have in my rear...down to having the housing and cover powdercoated...I couldn't see not doing it.
 
Took it in to the powdercoater last week, and just picked it up today. It looks a little more professional, now that's coated! lol. Had them do the rear diff cover too. Just 'cuz...

Matte Black on the diff cover, and some Red that he always stocks...forget what it's called.

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The LPW cover is very nice, like the drain plug. But, not a joy to install on a Cobra. I now know why they say to drop the suspension.
 
Got the cover and brace bolted onto the differential, and swapped it out with the one in the car. This one has 4.10 gears and a brand new Trac-loc assembly. Should be fun!

Currently it's just bolted to the subframe. I'll be heading out to put the axles/spindles back on in a little while.

It's a pity no one's ever gonna see it under there...

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