Rear differential mount broken - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

btwwat92 · 06-14-2021, 09:01 PM

2011 Camaro SS M6.
Got the car up on the lift today to pull the rear differential for a gear swap and trutrac upgrade and found that the rear diff cover/mount was broken around the bushing. Anybody else ever seen this? Or know what could possibly cause this? Thanks in advance....

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gtstorey · 06-15-2021, 09:27 AM

Damage when the stock bushing was cut out?

dreksnot · 06-15-2021, 12:33 PM

That edge looks so even and smooth, not like a fracture or break..... was it cut that way to install the new bushings because it looks that way to me (my 2-cents worth).

btwwat92 · 06-15-2021, 04:39 PM

Yeah, like I say, I don't know exactly what caused it. I was more curious if anyone had seen this before or had it happen to them. The bushing kit has been on the car for probably 2 or 3 yrs now.

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1JEWLDSSRS · 06-15-2021, 06:39 PM

As above, to me as well it looks like somebody cut it, nothing ever just breaks that evenly..

Shtiggs · 06-16-2021, 11:40 AM

I would agree with the assessment that it was cut to remove/install the bushings, the corners and cut seem way to square to be natural break from a defect in casting or stress. Did you install the bushings (or pay for them to be installed by someone else) or was it like that from a previous owner?

btwwat92 · 06-16-2021, 11:49 AM

The bushings were installed by a shop. They were the ones that brought it to my attention on Monday when they went to start removing the diff for a trutrac install.

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dreksnot · 06-16-2021, 11:58 AM

Well, it ain't right. But, apparently with the rear section missing, it hasn't destroyed the poly bushing and probably does perform mostly like it supposed to. With the open rear portion of the mount, the bushing can deflect out that opening. (I'm presuming those are poly (moderate durometer) and not Delrin (hard durometer) bushings)

btwwat92 · 06-16-2021, 12:00 PM

Yep, poly bushings. It just caught me off guard when they called about it since they were the shop that did the install.

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Shtiggs · 06-16-2021, 12:44 PM

You should find a new cover or get a PCE diff cover to replace that one during the gear and diff swap since that is really messed up. I used a bench grinder to put a slight chamfer on the bushing to help align and start them during the press.

PCE diff cover

btwwat92 · 06-16-2021, 12:54 PM

Already got one on the way! Thanks for the chamfer tip

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06-14-2021, 09:01 PM	#1
btwwat92 Drives: 1992 Red 25th Annversary RS Join Date: Jun 2009 Location: Anderson, SC Posts: 87	Rear differential mount broken 2011 Camaro SS M6. Got the car up on the lift today to pull the rear differential for a gear swap and trutrac upgrade and found that the rear diff cover/mount was broken around the bushing. Anybody else ever seen this? Or know what could possibly cause this? Thanks in advance.... Sent from my SM-G935V using Tapatalk

06-15-2021, 12:33 PM	#3
dreksnot Served USN - Atomic Chimp Drives: 2021 Camaro ZL1 1LE A10 (stock) Join Date: Jul 2012 Location: Fort Collins, CO Posts: 1,714 View My Garage	That edge looks so even and smooth, not like a fracture or break..... was it cut that way to install the new bushings because it looks that way to me (my 2-cents worth). __________________ > > 2021 Camaro ZL1 1LE A10 > > Past Builds: 2013 Twin-Turbo LSX434 M6 - 1,359rwhp daily

06-15-2021, 06:39 PM	#5
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 14,555	As above, to me as well it looks like somebody cut it, nothing ever just breaks that evenly.. __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.

06-16-2021, 11:58 AM	#8
dreksnot Served USN - Atomic Chimp Drives: 2021 Camaro ZL1 1LE A10 (stock) Join Date: Jul 2012 Location: Fort Collins, CO Posts: 1,714 View My Garage	Well, it ain't right. But, apparently with the rear section missing, it hasn't destroyed the poly bushing and probably does perform mostly like it supposed to. With the open rear portion of the mount, the bushing can deflect out that opening. (I'm presuming those are poly (moderate durometer) and not Delrin (hard durometer) bushings) __________________ > > 2021 Camaro ZL1 1LE A10 > > Past Builds: 2013 Twin-Turbo LSX434 M6 - 1,359rwhp daily

06-16-2021, 12:44 PM	#10
Shtiggs Drives: 2014 Camaro 2SS Manual Join Date: Feb 2018 Location: Denver Posts: 54	You should find a new cover or get a PCE diff cover to replace that one during the gear and diff swap since that is really messed up. I used a bench grinder to put a slight chamfer on the bushing to help align and start them during the press. PCE diff cover Last edited by Shtiggs; 06-16-2021 at 03:50 PM.

06-15-2021, 09:27 AM	#2
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,480	Damage when the stock bushing was cut out?

06-15-2021, 04:39 PM	#4
btwwat92 Drives: 1992 Red 25th Annversary RS Join Date: Jun 2009 Location: Anderson, SC Posts: 87	Yeah, like I say, I don't know exactly what caused it. I was more curious if anyone had seen this before or had it happen to them. The bushing kit has been on the car for probably 2 or 3 yrs now. Sent from my SM-G935V using Tapatalk

06-16-2021, 11:40 AM	#6
Shtiggs Drives: 2014 Camaro 2SS Manual Join Date: Feb 2018 Location: Denver Posts: 54	I would agree with the assessment that it was cut to remove/install the bushings, the corners and cut seem way to square to be natural break from a defect in casting or stress. Did you install the bushings (or pay for them to be installed by someone else) or was it like that from a previous owner?

06-16-2021, 11:49 AM	#7
btwwat92 Drives: 1992 Red 25th Annversary RS Join Date: Jun 2009 Location: Anderson, SC Posts: 87	The bushings were installed by a shop. They were the ones that brought it to my attention on Monday when they went to start removing the diff for a trutrac install. Sent from my SM-G935V using Tapatalk

06-16-2021, 12:00 PM	#9
btwwat92 Drives: 1992 Red 25th Annversary RS Join Date: Jun 2009 Location: Anderson, SC Posts: 87	Yep, poly bushings. It just caught me off guard when they called about it since they were the shop that did the install. Sent from my SM-G935V using Tapatalk

06-16-2021, 12:54 PM	#11
btwwat92 Drives: 1992 Red 25th Annversary RS Join Date: Jun 2009 Location: Anderson, SC Posts: 87	Already got one on the way! Thanks for the chamfer tip Sent from my SM-G935V using Tapatalk Last edited by btwwat92; 06-16-2021 at 03:45 PM.