Rear end "popping" noise, need help and opinions - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

usmcjlp · 06-16-2011, 05:29 PM

There a few eaton style true trac sytems that are supposed to come to market soon. One company builds the rear ends for corvette racing, Audi differentials, and military applications. But they are expensive and not out to market yet. I was told over $2000. It would involve switching to a spool. I have heard different things. Some say it will be tighter than the posimod. Others say it's a huge improvement.

Tough to know what's right. I'm not willing to risk more cash, until I hear it works from folks who own it.

usmcjlp · 06-16-2011, 05:31 PM

Fifty driver, I should have read all your mods before replying to your pm.

Fiftydriver · 06-16-2011, 11:27 PM

Took my car into my GM service center. Talked with the performance sercive department manager and his best vette and 2010-2011 camaro tech. Took them for a ride to let them hear the popping noise in the rear end.

First off, they were AMAZED at how loud the popping was and both instantly said it was the outer CV joints popping. Their discription was about what has been said on here. The axles binding up and twisting which preloads the CV joints and then when things release, you get the pop.

They seemed more concerned then many on this thread. They asked if it had gotten any worse since the diff was installed. In all honesty, it has gotten worse over since it was installed. Not dramatically so but it pops more often now then it did at first. I would not say its any louder, just more frequent.

I asked them if anything was going to break and both said it was unlikely that under normal driving conditions that anything would break but that eventually, the CV joints would wear to the point that I would hear this popping noise even at higher speed, mild turning. Not acceptable.

I asked them what the fix was and they gave me two options:

1. Replace the factory parts(which I do not have) to convert the rear end back to the factory limited slip system. They said this should solve the popping noise for sure but that if there was CV joint damage there may still be some popping noise at times which would require moving to option 2.

2. Install upgraded axles and see if that solves the problem. Again, may be needed anyway if the factory CV joints are damaged. If I have to replace the axles might as well upgrade them.

They were going to work up an estimate to convert the rear end back to the factory limited slip system so I guess I will find out tomorrow what the cost of each option would be and go from there.........

Fiftydriver · 06-18-2011, 10:24 AM

My service center told me 6-8 hours labor to convert the diff back to the factory limited slip unit. Sounds like ALOT to me but thats what they quoted.

They only quoted three hours of labor to install new axles and they said it may be less then that. Probably going to go that way.

They had the car all morning to look over the factory axles and when I picked the car up the service manager explained what they found. In their opinion, the factory axles on my camaro were quite sloppy from the factory to begin with and then when we installed the JRE diff., trailing arms and stiffer bushings, it exaggerated the problem and since there was no where else that would give, the loose CV joints reared their ugly head.

He also said that had we known that the warrantee would have covered the axle replacements but with the new rear end upgrade, they could not prove the CV joints were like this from the start so as I expected, no warrantee coverage, was not expecting any.

He said that the DSS 1400 HP axles would likely solve this problem, at least the popping of the CV joints as they are made to handle these types of stresses much better then the factory axles.

Guess that is the way I will go. If I had good factory axles I would probably just convert the rear end back to factory specs but these loose CV joints have me a bit worried once I put on the supercharger. Would rather replace them now then break them later and take the chance of breaking even more parts in the process.

On an interesting note, they had a 2011 camaro they had just installed 4.11 gears and an upgraded Diff with posi unit upgrade as well. They did not say hows posi unit it was. Other then that the car was a factory LS3 2SS. The customer was starting to prep this car for a strip car project. They let me take it for a spin and there was NO CV joint popping of any kind. Lots of wheel sliding but no popping. If I can get rid of the popping I will be happy because I love the traction of the JRE rear end.

Those 4.11s sure get you out of the hole fast!!! But that car hit red line very fast as well. I think I would hit the rev limiter ALOT with that car even just playing around. Hell, I do it now from time to time with my L99 A6. THis was a manual trans and I think I would get sick of shifting in town as much as needed with the 4.11 gears. My 3.73 are about perfect in my A6 for what I am looking to do. Just showed me how the CV joints should sound.

I guess now I get to order some fancy new DSS axles!!! Not a bad thing but was hoping to put more into the SC investment right now. Just have to back that up a bit longer now. I guess its better to correct the loose CV joints before adding more power to the car!!

IneedAZ · 09-14-2013, 06:31 PM

What was the final outcome? When I make sharp turns in a parking lot I get the popping and I too have the JRE clutches installed. I am using Mobil1 LS fluid and am thinking of adding some redline additive.

Fiftydriver · 09-18-2013, 12:24 AM

Turned out to be a cracked factory worm gear and some chipped gear teeth. This was not the fault of JRE at all.

We did install new axles, that did not solve the problem. We pulled the complete custom Diff and returned it to Ted. He instantly found the problem. Apparently this is one of the factory OEM parts that they leave in the factory differentials when they build their upgraded Diffs.

Had Ted build one with 3.91 LPE gears, billet caps and his posi upgrade. Returned it, installed it and never had a problem sense. Just bad luck with the faulty factory gear. Ted was great at helping me out.

IneedAZ · 09-18-2013, 09:30 AM

Quote:

Originally Posted by Fiftydriver

Turned out to be a cracked factory worm gear and some chipped gear teeth. This was not the fault of JRE at all.

We did install new axles, that did not solve the problem. We pulled the complete custom Diff and returned it to Ted. He instantly found the problem. Apparently this is one of the factory OEM parts that they leave in the factory differentials when they build their upgraded Diffs.

Had Ted build one with 3.91 LPE gears, billet caps and his posi upgrade. Returned it, installed it and never had a problem sense. Just bad luck with the faulty factory gear. Ted was great at helping me out.

Glad he got it worked out for u! thanks for the update. I am debating putting the stock GM clutches back in. When we upped the 3.73 to the 3.91 we noticed several ring gear teeth chipped as well as the bearings and spider gears. All of that was replaced, but we put the same JRE clutches back in and i am thinking its too tight.

Matt @ FSP · 09-19-2013, 09:47 PM

Quote:

Originally Posted by IneedAZ

Glad he got it worked out for u! thanks for the update. I am debating putting the stock GM clutches back in. When we upped the 3.73 to the 3.91 we noticed several ring gear teeth chipped as well as the bearings and spider gears. All of that was replaced, but we put the same JRE clutches back in and i am thinking its too tight.

Shim thickness or the gears are not ground flat.. Something is up, the last three from the same installer as you have all been the same way. One we just removed because the owner could not stand it. Heck it was annoying for us. Another one mine as well be a spool or locker, lol.

06-16-2011, 11:27 PM	#31
Fiftydriver Drives: 2010 Camaro 2SSRS RJT L99 Join Date: Jun 2010 Location: Fort Shaw, Montana Posts: 1,242	Took my car into my GM service center. Talked with the performance sercive department manager and his best vette and 2010-2011 camaro tech. Took them for a ride to let them hear the popping noise in the rear end. First off, they were AMAZED at how loud the popping was and both instantly said it was the outer CV joints popping. Their discription was about what has been said on here. The axles binding up and twisting which preloads the CV joints and then when things release, you get the pop. They seemed more concerned then many on this thread. They asked if it had gotten any worse since the diff was installed. In all honesty, it has gotten worse over since it was installed. Not dramatically so but it pops more often now then it did at first. I would not say its any louder, just more frequent. I asked them if anything was going to break and both said it was unlikely that under normal driving conditions that anything would break but that eventually, the CV joints would wear to the point that I would hear this popping noise even at higher speed, mild turning. Not acceptable. I asked them what the fix was and they gave me two options: 1. Replace the factory parts(which I do not have) to convert the rear end back to the factory limited slip system. They said this should solve the popping noise for sure but that if there was CV joint damage there may still be some popping noise at times which would require moving to option 2. 2. Install upgraded axles and see if that solves the problem. Again, may be needed anyway if the factory CV joints are damaged. If I have to replace the axles might as well upgrade them. They were going to work up an estimate to convert the rear end back to the factory limited slip system so I guess I will find out tomorrow what the cost of each option would be and go from there......... __________________ Fiftydriver 2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages. More to come!!

06-18-2011, 10:24 AM	#32
Fiftydriver Drives: 2010 Camaro 2SSRS RJT L99 Join Date: Jun 2010 Location: Fort Shaw, Montana Posts: 1,242	My service center told me 6-8 hours labor to convert the diff back to the factory limited slip unit. Sounds like ALOT to me but thats what they quoted. They only quoted three hours of labor to install new axles and they said it may be less then that. Probably going to go that way. They had the car all morning to look over the factory axles and when I picked the car up the service manager explained what they found. In their opinion, the factory axles on my camaro were quite sloppy from the factory to begin with and then when we installed the JRE diff., trailing arms and stiffer bushings, it exaggerated the problem and since there was no where else that would give, the loose CV joints reared their ugly head. He also said that had we known that the warrantee would have covered the axle replacements but with the new rear end upgrade, they could not prove the CV joints were like this from the start so as I expected, no warrantee coverage, was not expecting any. He said that the DSS 1400 HP axles would likely solve this problem, at least the popping of the CV joints as they are made to handle these types of stresses much better then the factory axles. Guess that is the way I will go. If I had good factory axles I would probably just convert the rear end back to factory specs but these loose CV joints have me a bit worried once I put on the supercharger. Would rather replace them now then break them later and take the chance of breaking even more parts in the process. On an interesting note, they had a 2011 camaro they had just installed 4.11 gears and an upgraded Diff with posi unit upgrade as well. They did not say hows posi unit it was. Other then that the car was a factory LS3 2SS. The customer was starting to prep this car for a strip car project. They let me take it for a spin and there was NO CV joint popping of any kind. Lots of wheel sliding but no popping. If I can get rid of the popping I will be happy because I love the traction of the JRE rear end. Those 4.11s sure get you out of the hole fast!!! But that car hit red line very fast as well. I think I would hit the rev limiter ALOT with that car even just playing around. Hell, I do it now from time to time with my L99 A6. THis was a manual trans and I think I would get sick of shifting in town as much as needed with the 4.11 gears. My 3.73 are about perfect in my A6 for what I am looking to do. Just showed me how the CV joints should sound. I guess now I get to order some fancy new DSS axles!!! Not a bad thing but was hoping to put more into the SC investment right now. Just have to back that up a bit longer now. I guess its better to correct the loose CV joints before adding more power to the car!! __________________ Fiftydriver 2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages. More to come!!

09-14-2013, 06:31 PM	#33
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,111 View My Garage	What was the final outcome? When I make sharp turns in a parking lot I get the popping and I too have the JRE clutches installed. I am using Mobil1 LS fluid and am thinking of adding some redline additive. __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

09-18-2013, 12:24 AM	#34
Fiftydriver Drives: 2010 Camaro 2SSRS RJT L99 Join Date: Jun 2010 Location: Fort Shaw, Montana Posts: 1,242	Turned out to be a cracked factory worm gear and some chipped gear teeth. This was not the fault of JRE at all. We did install new axles, that did not solve the problem. We pulled the complete custom Diff and returned it to Ted. He instantly found the problem. Apparently this is one of the factory OEM parts that they leave in the factory differentials when they build their upgraded Diffs. Had Ted build one with 3.91 LPE gears, billet caps and his posi upgrade. Returned it, installed it and never had a problem sense. Just bad luck with the faulty factory gear. Ted was great at helping me out. __________________ Fiftydriver 2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages. More to come!!

06-16-2011, 05:29 PM	#29
usmcjlp Drives: 2SS/RS LS3 RJT Join Date: Jun 2009 Location: Northern Virginia Posts: 754	There a few eaton style true trac sytems that are supposed to come to market soon. One company builds the rear ends for corvette racing, Audi differentials, and military applications. But they are expensive and not out to market yet. I was told over $2000. It would involve switching to a spool. I have heard different things. Some say it will be tighter than the posimod. Others say it's a huge improvement. Tough to know what's right. I'm not willing to risk more cash, until I hear it works from folks who own it.

06-16-2011, 05:31 PM	#30
usmcjlp Drives: 2SS/RS LS3 RJT Join Date: Jun 2009 Location: Northern Virginia Posts: 754	Fifty driver, I should have read all your mods before replying to your pm.