Blew my rear diff.

burnout5.0 · November 24th, 2009, 12:42 PM

So its been a while since ive been on here cause my car has been damn good to me for the most part but i just blew apart my rear diff and theres a hole in it about the size of my fist. so its time for a new diff and axles what should i buy as far a brand of diff and axles if you could send me links to some stuff that would be awesome. thanks guys. oh yeah its an 04 cobra and i wanna keep the IRS.

rk_2000_Z/28 · November 24th, 2009, 01:17 PM

Why did it blow? I'd look into replacing the soft bushings with the Full Tilt Boogie Racing kit.

burnout5.0 · November 24th, 2009, 01:49 PM

idk i beat the shit outta my car and i guess it just had enough i really could care less as to how it blew lol i just wanna fix it... its only been broken for a few hours and i miss it already.

M.P. Cobra Fan · November 24th, 2009, 02:45 PM

Well unless you know How you blew it, you will continue to do it again. If you are keeping IRS, I would suggest bulding it this time. FTB bushings, IRS brace (either billetflow, steeda, or the Fore precision piece). What type of power are you putting down? What type of driving do you do? Stock diff housing and axles are strong if you have the right supporting components.

burnout5.0 · November 26th, 2009, 03:41 PM

it was a completly stock rear and im making 448 rwhp and 475 rwtq but i the rear was always a funky it clunked around alot and i beat the crap outta my car so i think it was only a matter of time.

rk_2000_Z/28 · November 27th, 2009, 10:34 AM

This sure sounds a lot like what happened to me. Have you been able to pin point what actually broke and put the hole in your cover?

Here is a link to my thread:

Rubber Bushings=Bad (carnage pics)

As far as a new cover, I picked up an OEM from Tousley Ford for what I think is a decent price.

Fore makes a beautifull aftermarket piece you can get from Lethal Performance. But, I have a feeling you will need to take out a second mortgage to get it. Looks pricey.

burnout5.0 · November 27th, 2009, 07:18 PM

yeah my hole is alot bigger and on the other side of the cover but yeah im pulling the whole thing out havin the whole thing rebuilt and doin an Eaton LSD and 3.73s. im just prayin there are no cracks in the case i havent really looked at it all all, just once. im pullin it apart on sunday ill let you guys kno and maybe put up some pics too.

Fastback91 · November 27th, 2009, 09:36 PM

same thing happended to my buddy when he was racing a lambo lol

forcefedcobra · November 29th, 2009, 01:37 PM

Originally Posted by burnout5.0

yeah my hole is alot bigger and on the other side of the cover but yeah im pulling the whole thing out havin the whole thing rebuilt and doin an Eaton LSD and 3.73s. im just prayin there are no cracks in the case i havent really looked at it all all, just once. im pullin it apart on sunday ill let you guys kno and maybe put up some pics too.

sounds like yours broke on the side you should have already put a steeda diff brace on.............however if you dont upgrade the crap factory rubber bushings you will just end up with a hole on the other side of the diff cover like RK2000z28 stated.

burnout5.0 · November 29th, 2009, 03:32 PM

yep thats what happened the whole diff is still intact it just blew apart the cover. im still going to have it rebuilt w/ 3.73s.

forcefedcobra · November 29th, 2009, 04:34 PM

Originally Posted by burnout5.0

yep thats what happened the whole diff is still intact it just blew apart the cover. im still going to have it rebuilt w/ 3.73s.

dont know what your budget is but i would strongly suggest upgrading other parts before swapping gears. hopefully you can afford to do it all at once but if not I would hold off on the gear swap.

burnout5.0 · November 29th, 2009, 07:52 PM

what else would you guys suggest i do. including the price of the rebuild ive only got like just shy of 1000 bucks.

M.P. Cobra Fan · November 30th, 2009, 10:04 AM

Bushings Bushings Bushings. Make sure you atleast get the diff bushing kit from either FTB or MM. Then make sure you add an aftermarket cover, like the one from FORE, or the one available on AM. If those are out of budget, FORE will be I am sure, then go with the BilletFlow or Steeda IRS brace.

forcefedcobra · December 2nd, 2009, 01:29 PM

Originally Posted by M.P. Cobra Fan

Bushings Bushings Bushings. Make sure you atleast get the diff bushing kit from either FTB or MM. Then make sure you add an aftermarket cover, like the one from FORE, or the one available on AM. If those are out of budget, FORE will be I am sure, then go with the BilletFlow or Steeda IRS brace.

+1. the fore cover is nice but from what the OP seems to be using his car for and the power it is making I think a BF or steeda diff brace will be fine as long as he at minimum changes his front and rear diff bushings over to some full tilt boogie racing goodies.

06RedfireGT · December 9th, 2009, 04:16 PM

Originally Posted by burnout5.0

yeah my hole is alot bigger and on the other side of the cover but yeah im pulling the whole thing out havin the whole thing rebuilt and doin an Eaton LSD and 3.73s. im just prayin there are no cracks in the case i havent really looked at it all all, just once. im pullin it apart on sunday ill let you guys kno and maybe put up some pics too.

Not sure if it is the same with the IRS, but from what I have heard for the SRA, the Detroit Tru-Trac is a much better unit than the Eaton.

I'm pretty sure that the Eaton unit uses clutch packs much like the stock unit, whereas the Detroit unit uses a gear setup, which is a lot more durable and less susceptible to wear.

Eaton Detroit True-Trac 8.8 31 Spline Limited Slip Differential [913A561] : Lethal Performance, Performance parts for Ford Mustangs

November 24th, 2009, 12:42 PM	#1
burnout5.0 Regular 2004 Mustang SVT Cobra 448whp/475wtq Join Date: Nov 2006 Location: Connecticut Posts: 368 iTrader: 0 reviews	Blew my rear diff. So its been a while since ive been on here cause my car has been damn good to me for the most part but i just blew apart my rear diff and theres a hole in it about the size of my fist. so its time for a new diff and axles what should i buy as far a brand of diff and axles if you could send me links to some stuff that would be awesome. thanks guys. oh yeah its an 04 cobra and i wanna keep the IRS. __________________ MM Cobra Club #78

November 24th, 2009, 01:17 PM	#2
rk_2000_Z/28 Forever in our hearts travis_afx 2003 SVT Cobra Join Date: Apr 2007 Location: Enid, OK Posts: 4,311 iTrader: 0 reviews	Why did it blow? I'd look into replacing the soft bushings with the Full Tilt Boogie Racing kit. __________________ 03 Cobra-Slow 02 SS, 00 Z/28-Gone Rest In Peace Travis Billings

November 24th, 2009, 01:49 PM	#3
burnout5.0 Regular 2004 Mustang SVT Cobra 448whp/475wtq Join Date: Nov 2006 Location: Connecticut Posts: 368 iTrader: 0 reviews	idk i beat the shit outta my car and i guess it just had enough i really could care less as to how it blew lol i just wanna fix it... its only been broken for a few hours and i miss it already. __________________ MM Cobra Club #78

November 24th, 2009, 02:45 PM	#4
M.P. Cobra Fan It's in the details Mod! 01 Cobra Vert Nov 09/10 ROTM! Join Date: Mar 2009 Location: Ft Stewart/Naples/Hampton/Tampa Posts: 11,013 iTrader: 1 reviews	Well unless you know How you blew it, you will continue to do it again. If you are keeping IRS, I would suggest bulding it this time. FTB bushings, IRS brace (either billetflow, steeda, or the Fore precision piece). What type of power are you putting down? What type of driving do you do? Stock diff housing and axles are strong if you have the right supporting components. __________________ Pinup in signature by loish.net Modded Mustangs Cobra Club#007 Military Crew E5 VOTED MM's BEST SIGNATURE 2010. THANKS STANGGTR07

November 26th, 2009, 03:41 PM	#5
burnout5.0 Regular 2004 Mustang SVT Cobra 448whp/475wtq Join Date: Nov 2006 Location: Connecticut Posts: 368 iTrader: 0 reviews	it was a completly stock rear and im making 448 rwhp and 475 rwtq but i the rear was always a funky it clunked around alot and i beat the crap outta my car so i think it was only a matter of time. __________________ MM Cobra Club #78

November 27th, 2009, 10:34 AM	#6
rk_2000_Z/28 Forever in our hearts travis_afx 2003 SVT Cobra Join Date: Apr 2007 Location: Enid, OK Posts: 4,311 iTrader: 0 reviews	This sure sounds a lot like what happened to me. Have you been able to pin point what actually broke and put the hole in your cover? Here is a link to my thread: Rubber Bushings=Bad (carnage pics) As far as a new cover, I picked up an OEM from Tousley Ford for what I think is a decent price. Fore makes a beautifull aftermarket piece you can get from Lethal Performance. But, I have a feeling you will need to take out a second mortgage to get it. Looks pricey. __________________ 03 Cobra-Slow 02 SS, 00 Z/28-Gone Rest In Peace Travis Billings

November 27th, 2009, 07:18 PM	#7
burnout5.0 Regular 2004 Mustang SVT Cobra 448whp/475wtq Join Date: Nov 2006 Location: Connecticut Posts: 368 iTrader: 0 reviews	yeah my hole is alot bigger and on the other side of the cover but yeah im pulling the whole thing out havin the whole thing rebuilt and doin an Eaton LSD and 3.73s. im just prayin there are no cracks in the case i havent really looked at it all all, just once. im pullin it apart on sunday ill let you guys kno and maybe put up some pics too. __________________ MM Cobra Club #78

November 27th, 2009, 09:36 PM	#8
Fastback91 Hardcore Enthusiast 2008 Black Bullitt Sylv Rivial :P Join Date: Aug 2007 Location: California Posts: 1,397 iTrader: 0 reviews	same thing happended to my buddy when he was racing a lambo lol __________________ [/SIZE]Bullitt Crew # http://www.youtube.com/watch?v=jeYscnFpEyA rk_2000_Z/28:"Talk about tuck tail and run. Zoom Zoom motherfucker."

November 29th, 2009, 03:32 PM	#10
burnout5.0 Regular 2004 Mustang SVT Cobra 448whp/475wtq Join Date: Nov 2006 Location: Connecticut Posts: 368 iTrader: 0 reviews	yep thats what happened the whole diff is still intact it just blew apart the cover. im still going to have it rebuilt w/ 3.73s. __________________ MM Cobra Club #78

November 29th, 2009, 07:52 PM	#12
burnout5.0 Regular 2004 Mustang SVT Cobra 448whp/475wtq Join Date: Nov 2006 Location: Connecticut Posts: 368 iTrader: 0 reviews	what else would you guys suggest i do. including the price of the rebuild ive only got like just shy of 1000 bucks. __________________ MM Cobra Club #78

November 30th, 2009, 10:04 AM	#13
M.P. Cobra Fan It's in the details Mod! 01 Cobra Vert Nov 09/10 ROTM! Join Date: Mar 2009 Location: Ft Stewart/Naples/Hampton/Tampa Posts: 11,013 iTrader: 1 reviews	Bushings Bushings Bushings. Make sure you atleast get the diff bushing kit from either FTB or MM. Then make sure you add an aftermarket cover, like the one from FORE, or the one available on AM. If those are out of budget, FORE will be I am sure, then go with the BilletFlow or Steeda IRS brace. __________________ Pinup in signature by loish.net Modded Mustangs Cobra Club#007 Military Crew E5 VOTED MM's BEST SIGNATURE 2010. THANKS STANGGTR07

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