SS rear diff not locking - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

CamaroSSRS11 · 07-15-2012, 01:52 PM

I was out the other day when I came across a nice open piece of "closed course" and decided to have a little fun with my 11' SS (M6) I wanted to do a standing burnout followed by a doughnut or two. My question is why this did not go to plan and is something wrong with the car or the driver? (it's never the driver, right?)

I started by disabling the electronic traction control and stabilitrack by holding the bottom down till both warning lights illuminated on the dash. I then held the brake while adding throttle and letting the clutch out. The right rear tire began to spin but the left stayed still even after rolling forward and attempting a doughnut. It almost felt as if the stability control was breaking one wheel to prevent yaw.

Just to see what would happen, I changed modes to Competitive mode and attempted another go. To my surprise, the car whipped right around with no issues accept for the "service stabilitrack" message on the center display that went off when the car was restarted just like after dyno runs.

Is fully off mode for traction control and stability control not fully off, is my limited slip rear end allowing a lot of slip and malfunctioning, or am I doing something completely wrong?

The fact that I couldn't find any other forum posts or threads on this has me worried. I don't know if this is the right place for this question so please fill free to move it to the proper place.

SUX2BU · 07-15-2012, 01:57 PM

Doing a burn out while standing on the brakes isn't the best thing to do for your diff. Sure you have seen everyone do it and it works 95% of the time, but if you apply too much brake pressure you over come the strength of the clutches in the diff. One wheel stays locked and the other spins twice as fast, this will wear the ever living crap out of your diff clutches. If you really want to do standing burn outs and be 100% sure you will not harm the diff clutches get a line lock.

JLE58 · 07-15-2012, 10:02 PM

Alot of people have problems with the stock posi and one wheel peel... It was noticed not long after the camaro came out and at Camaro 5 fest 1 alot... JRE makes a posi mod you can do.

SC2150 · 07-15-2012, 10:17 PM

Give Jannetty a call. They have the fix.

CamaroSSRS11 · 07-15-2012, 11:11 PM

Thanks for your help guys, Looks like I'll be ordering the JRE Posi Mod very soon! Does anyone know what exactly the issue is?

Supercharged SS · 07-15-2012, 11:13 PM

Quote:

Originally Posted by CamaroSSRS11

Thanks for your help guys, Looks like I'll be ordering the JRE Posi Mod very soon! Does anyone know what exactly the issue is?

My car did it back in the day too. If the tires are wet it doesn't happen. I'm not sure why. Ted will be able to explain it for you.

SUX2BU · 07-16-2012, 02:07 AM

Quote:

Originally Posted by CamaroSSRS11

Does anyone know what exactly the issue is?

Read post #2.

CamaroSSRS11 · 07-16-2012, 09:38 PM

Sorry, I'm just having difficulty wrapping my head around my brakes overpowering the limited slip. I don't know enough about rear end locking mechanisms and the upgrade kit doesn't specify what it replaces or modifies, so I can't visualize what is going on. Back in high school I drove my parents 98' WS6 T/A and that thing had no problem smoking both rears! I think this is the first real disappointment I have had with my 5th gen.

JLE58 · 07-17-2012, 12:16 PM

Its the break away torque set up from the factory being weak. The JRE posi mod kit is the fix.

07-15-2012, 01:52 PM	#1
CamaroSSRS11 Drives: 2017 White SS 1LE Join Date: Dec 2010 Location: Las Vegas Posts: 25 View My Garage	SS rear diff not locking I was out the other day when I came across a nice open piece of "closed course" and decided to have a little fun with my 11' SS (M6) I wanted to do a standing burnout followed by a doughnut or two. My question is why this did not go to plan and is something wrong with the car or the driver? (it's never the driver, right?) I started by disabling the electronic traction control and stabilitrack by holding the bottom down till both warning lights illuminated on the dash. I then held the brake while adding throttle and letting the clutch out. The right rear tire began to spin but the left stayed still even after rolling forward and attempting a doughnut. It almost felt as if the stability control was breaking one wheel to prevent yaw. Just to see what would happen, I changed modes to Competitive mode and attempted another go. To my surprise, the car whipped right around with no issues accept for the "service stabilitrack" message on the center display that went off when the car was restarted just like after dyno runs. Is fully off mode for traction control and stability control not fully off, is my limited slip rear end allowing a lot of slip and malfunctioning, or am I doing something completely wrong? The fact that I couldn't find any other forum posts or threads on this has me worried. I don't know if this is the right place for this question so please fill free to move it to the proper place.

07-15-2012, 01:57 PM	#2
SUX2BU Quit being a pu$$y Drives: FAST Join Date: Jan 2011 Location: Sachse TX (DFW) Posts: 5,825 View My Garage	Doing a burn out while standing on the brakes isn't the best thing to do for your diff. Sure you have seen everyone do it and it works 95% of the time, but if you apply too much brake pressure you over come the strength of the clutches in the diff. One wheel stays locked and the other spins twice as fast, this will wear the ever living crap out of your diff clutches. If you really want to do standing burn outs and be 100% sure you will not harm the diff clutches get a line lock. __________________ <----- Click HERE to see ALL of my mods/write ups

07-15-2012, 10:02 PM	#3
JLE58 Drives: CGM,twin turbo, cam 2010 SS/RS Join Date: Mar 2011 Location: ROCKMART, GA Posts: 2,185	Alot of people have problems with the stock posi and one wheel peel... It was noticed not long after the camaro came out and at Camaro 5 fest 1 alot... JRE makes a posi mod you can do.

07-15-2012, 10:17 PM	#4
SC2150 Account Suspended Drives: 2012 Camaro RS, RX supercharged Join Date: Dec 2009 Location: Bradenton, FL Posts: 6,063	Give Jannetty a call. They have the fix.

07-15-2012, 11:11 PM	#5
CamaroSSRS11 Drives: 2017 White SS 1LE Join Date: Dec 2010 Location: Las Vegas Posts: 25 View My Garage	Thanks for your help guys, Looks like I'll be ordering the JRE Posi Mod very soon! Does anyone know what exactly the issue is?

07-16-2012, 09:38 PM	#8
CamaroSSRS11 Drives: 2017 White SS 1LE Join Date: Dec 2010 Location: Las Vegas Posts: 25 View My Garage	Sorry, I'm just having difficulty wrapping my head around my brakes overpowering the limited slip. I don't know enough about rear end locking mechanisms and the upgrade kit doesn't specify what it replaces or modifies, so I can't visualize what is going on. Back in high school I drove my parents 98' WS6 T/A and that thing had no problem smoking both rears! I think this is the first real disappointment I have had with my 5th gen.

07-17-2012, 12:16 PM	#9
JLE58 Drives: CGM,twin turbo, cam 2010 SS/RS Join Date: Mar 2011 Location: ROCKMART, GA Posts: 2,185	Its the break away torque set up from the factory being weak. The JRE posi mod kit is the fix.