Rubber Bushings=Bad (carnage pics)

rk_2000_Z/28 · October 26th, 2009, 02:19 PM

I haven't made a thread about this yet, but about two weeks ago I took a couple of friends out for a little joy ride. Of course, I wanted to show off so I was really putting the spurs to this old horse. I had it matted and was shifting like a mad man (I was actually very impressed with my shifting

)

But as soon as I let out at ~90 I hear SNAP!!! Than a horrible, horrible vibration noise.

So I limped the poor girl home, where it has sat for a couple of weeks until yesturday when me and my main man Brandon (forcefedcobra) finally got it torn down (it was mainly Brandon-I'm just around for eye candy)

And this is what we saw.

This is not good. A little closer view of the diff cover. That big whole is not supposed to be there.

This is the cause of the problem:

This is the rear bracket that helps support the rear of the differential. It uses a very soft rubber bushing. It appears that the bushings had too much give in them and let the brace twist too much and "SNAP!" And the broken bracket just punched a whole in the cover.

SOOOOO....From Brandon's suggestion I ordered a new set of Delrin bushings from Full Tilt Boogie Racing and a set of alluminum front supports and washers to set the pinion angle properly. Hopefully this will help keep this from happening any time soon.

How my car looks now:

BostonPerformance · October 26th, 2009, 02:21 PM

that sucks.
those rear brakes look tiny lol

rk_2000_Z/28 · October 26th, 2009, 02:22 PM

And yes, we will be painting the calipers and and rotor top hats while we have everything appart. Whoever painted them before I got the car did a HORRIBLE job.

AzSonicSnake · October 26th, 2009, 02:24 PM

Sra Ftmfw.

Mach Boy · October 26th, 2009, 06:25 PM

Looks like you'll need to add a diff cover to that shopping list as well.

mustanginky · October 26th, 2009, 06:53 PM

and some more jack stands. i wouldnt lay underneath that setup for a million dollars.

TheUNZippee! · October 26th, 2009, 06:55 PM

Seriously.

M.P. Cobra Fan · October 26th, 2009, 07:25 PM

Damn man that sucks. That is the reason that I replaced my diff bushings with the MM kit. Hope to prevent that problem.

SWEET2KSTANG · October 27th, 2009, 12:47 AM

damn dude, i looking for SRA for my buddies 03. he has a small klunk from the rear end and is really pissing him off.

08blkgt500 · October 27th, 2009, 01:19 AM

Originally Posted by mustanginky

and some more jack stands. i wouldnt lay underneath that setup for a million dollars.

+1. one jack stand? really?

sucks that had to happen to you

forcefedcobra · October 27th, 2009, 01:31 AM

Originally Posted by Mach Boy

Looks like you'll need to add a diff cover to that shopping list as well.

I had him purchase one before we even knew it had a huge hole blown into it.

Originally Posted by mustanginky

and some more jack stands. i wouldnt lay underneath that setup for a million dollars.

Its not going anywhere.

Originally Posted by 08blkgt500

+1. one jack stand? really?

sucks that had to happen to you

are you serious? How would you get the car to balance on one jack stand? Of course there is another jack stand under the flsfc on the driver side also.

forcefedcobra · October 27th, 2009, 01:34 AM

Originally Posted by SWEET2KSTANG

damn dude, i looking for SRA for my buddies 03. he has a small klunk from the rear end and is really pissing him off.

yeah the clunk of the irs can be annoying. upgrading to bruce's bushing kit and larger front irs subframe bolts really helps or completely gets rid of the clunk.

full tilt boogie racing FTW!

08blkgt500 · October 27th, 2009, 01:34 AM

Originally Posted by forcefedcobra

are you serious? How would you get the car to balance on one jack stand? Of course there is another jack stand under the flsfc on the driver side also.

oh sorry

id still put another one under there for security haha

forcefedcobra · October 27th, 2009, 02:05 AM

Originally Posted by 08blkgt500

oh sorry

id still put another one under there for security haha

LOL! yeah it looks crazy in the pic. The car isnt going anywhere though. I'm using all my tools to work on the car at his house, so my cobra was loaded up with tools, jack, jack stands, etc, etc......

SWEET2KSTANG · October 27th, 2009, 02:06 AM

Originally Posted by forcefedcobra

yeah the clunk of the irs can be annoying. upgrading to bruce's bushing kit and larger front irs subframe bolts really helps or completely gets rid of the clunk.

full tilt boogie racing FTW!

glad to hear that. i am guessing its a common problem with these things then? he wants to do the SRA to prevent anything from happening in the future, i think he wants to do all the stuff to it but keep stock eaton for now.

forcefedcobra · October 27th, 2009, 02:25 AM

Originally Posted by SWEET2KSTANG

glad to hear that. i am guessing its a common problem with these things then? he wants to do the SRA to prevent anything from happening in the future, i think he wants to do all the stuff to it but keep stock eaton for now.

yeah the clunk is a very common problem. between driveline slop and irs slop it can get pretty bad. However having all of bruce's "full tilt boogie racing" goodies makes a HUGE difference in every single way possible. street, strip, road track......whatever. I still get some clunk but nothing near like it was when all stock but I have no fear of anything in the irs giving up the ghost like Ryan's did.

SWEET2KSTANG · October 27th, 2009, 02:36 AM

half shafts?

M.P. Cobra Fan · October 27th, 2009, 08:27 AM

Originally Posted by forcefedcobra

yeah the clunk is a very common problem. between driveline slop and irs slop it can get pretty bad. However having all of bruce's "full tilt boogie racing" goodies makes a HUGE difference in every single way possible. street, strip, road track......whatever. I still get some clunk but nothing near like it was when all stock but I have no fear of anything in the irs giving up the ghost like Ryan's did.

How much is driveline vibration increased in the cabin with the FTB kit? I really like the concept of this kit, but being mine is a daily driver that never sees track use, I am wondering if the trade off is worth it.

Thanks.

forcefedcobra · October 27th, 2009, 08:42 PM

Originally Posted by SWEET2KSTANG

half shafts?

IMHO......upgrading half shafts isnt needed. 9/10 people have more problems with aftermarket half shafts than they are worth. a set of 28" or even 26" (depending on how much rwhp and how crazy they launch) will do the trick and keep the half shafts happy. Most halfshafts are broken due to launching too hard on drag radials and getting wheel hop...........You shouldnt get wheel hop with a good set of slicks. Plus they will absorb some of the initial shock of the launch.

Originally Posted by M.P. Cobra Fan

How much is driveline vibration increased in the cabin with the FTB kit? I really like the concept of this kit, but being mine is a daily driver that never sees track use, I am wondering if the trade off is worth it.

Thanks.

nothing turning the radio up a little wont cure. You will have some increase noise in the cabin but it isnt that bad.

The car pictured in this thread is a purely street driven car and you can see the results of crap stock rubber bushings.

Sirl · October 27th, 2009, 08:50 PM

Here... try some of this Might Putty.. Supposed to stop leaks on anything

October 26th, 2009, 02:19 PM	#1
rk_2000_Z/28 boats n' hoes 2003 SVT Cobra Join Date: Apr 2007 Location: Enid, OK Posts: 2,857	Rubber Bushings=Bad (carnage pics) I haven't made a thread about this yet, but about two weeks ago I took a couple of friends out for a little joy ride. Of course, I wanted to show off so I was really putting the spurs to this old horse. I had it matted and was shifting like a mad man (I was actually very impressed with my shifting ) But as soon as I let out at ~90 I hear SNAP!!! Than a horrible, horrible vibration noise. So I limped the poor girl home, where it has sat for a couple of weeks until yesturday when me and my main man Brandon (forcefedcobra) finally got it torn down (it was mainly Brandon-I'm just around for eye candy) And this is what we saw. This is not good. A little closer view of the diff cover. That big whole is not supposed to be there. This is the cause of the problem: This is the rear bracket that helps support the rear of the differential. It uses a very soft rubber bushing. It appears that the bushings had too much give in them and let the brace twist too much and "SNAP!" And the broken bracket just punched a whole in the cover. SOOOOO....From Brandon's suggestion I ordered a new set of Delrin bushings from Full Tilt Boogie Racing and a set of alluminum front supports and washers to set the pinion angle properly. Hopefully this will help keep this from happening any time soon. How my car looks now: __________________ 03 Cobra-Slow 02 SS, 00 Z/28-Gone "Mods are like STD's. You don't tell everybody everything. Not even your best friends."

October 26th, 2009, 02:21 PM	#2
BostonPerformance Regular 99 Cherokee sport/87 5.0 not tested Join Date: Jun 2008 Location: san antonio, tx Posts: 497	that sucks. those rear brakes look tiny lol __________________ "Not the victory but the action; Not the goal but the game; In the deed the glory," -Hartley Burr Alexander TILLER IS MY BASTARD CHILD'S SON'S BOYFRIEND

October 26th, 2009, 02:22 PM	#3
rk_2000_Z/28 boats n' hoes 2003 SVT Cobra Join Date: Apr 2007 Location: Enid, OK Posts: 2,857	And yes, we will be painting the calipers and and rotor top hats while we have everything appart. Whoever painted them before I got the car did a HORRIBLE job. __________________ 03 Cobra-Slow 02 SS, 00 Z/28-Gone "Mods are like STD's. You don't tell everybody everything. Not even your best friends."

October 26th, 2009, 02:24 PM	#4
AzSonicSnake May ROTM 2003 SVT Cobra 11.07@127 Join Date: Aug 2008 Location: North Phoenix,AZ Posts: 2,566	Sra Ftmfw. __________________ MM Cobra Club #25 My Autolog Profile HARDCORE CREW

October 26th, 2009, 06:25 PM	#5
Mach Boy MM's Orangest 2004 Mach 1 Mustang 13.62@104 Join Date: Sep 2007 Location: Terre Haute, IN / St. Louis, MO Posts: 1,869	Looks like you'll need to add a diff cover to that shopping list as well. __________________ Project: Fach You, In Progress

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October 26th, 2009, 06:53 PM	#6
mustanginky Enthusiast 2000 gt Join Date: Feb 2009 Location: La grange, KY Posts: 963	and some more jack stands. i wouldnt lay underneath that setup for a million dollars. __________________ Procharged 2000 5 Speed BAB GT, 7.3 lbs, 368 hp, 406 rwtq. HARDCORE CREW

October 26th, 2009, 07:25 PM	#8
M.P. Cobra Fan Lefty's Fah-zah 2001 Cobra - Topless 1:59.8@10.2MPH Mall Crusier Baby! Join Date: Mar 2009 Location: ATL / TPA Posts: 1,803	Damn man that sucks. That is the reason that I replaced my diff bushings with the MM kit. Hope to prevent that problem. __________________ MM Cobra Club Member# 007 This space for rent

October 27th, 2009, 12:47 AM	#9
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,987	damn dude, i looking for SRA for my buddies 03. he has a small klunk from the rear end and is really pissing him off. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

October 27th, 2009, 02:36 AM	#17
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,987	half shafts? __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

October 27th, 2009, 08:50 PM	#20
Sirl Regular 2000 Join Date: May 2008 Location: Ft. Lauderdale, FL Posts: 345	Here... try some of this Might Putty.. Supposed to stop leaks on anything __________________ Mitch's Track Videos http://www.youtube.com/user/Msirlin My Garage page: http://www.moddedmustangs.com/forums...-member-17090/

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