ZL-1 1Le Torque Steer, goes left on throttle - Page 5

closs2sx · 04-09-2018, 11:38 AM

Quote:

Originally Posted by JANNETTYRACING

Update, went to the dealer this morning and took the Service manager out and showed him what it is doing, He was Freaked out by it.

So we took an Identical new car out and it went perfectly straight under the same test.

They have a call in to a GM Chassis specialist that has the case on his desk.

Now the waiting game begins.

We all know the waiting game with GM. Still waiting on my 2nd ZL1 1LE to ship. I guess I should drive mine before I sign for it. I was hoping not to with the sand on the road I was going to trailer directly to the Xpel installer. How much acceleration are you doing to get your car to act up so I can test mine when it gets here?

*mlee* · 04-09-2018, 11:38 AM

Duplicated issue is a huge plus...

JANNETTYRACING · 04-09-2018, 11:41 AM

Quote:

Originally Posted by closs2sx

We all know the waiting game with GM. Still waiting on my 2nd ZL1 1LE to ship. I guess I should drive mine before I sign for it. I was hoping not to with the sand on the road I was going to trailer directly to the Xpel installer. How much acceleration are you doing to get your car to act up so I can test mine when it gets here

My dealer has 3, Red, Garnet, and Blue.

Ted.

JANNETTYRACING · 04-09-2018, 11:42 AM

Quote:

Originally Posted by mlee

Duplicated issue is a huge plus...

Nothing we did to the suspension, tires alignment, corner weights, tire pressures, conditions, with and without passenger has any affect on it.

Does it ever time.

Ted.

Can'tHave2MuchHP · 04-09-2018, 11:45 AM

Ted's issue is separate from the "Floating" feeling that some/all? ZL1 owners experience. Thankfully GM has gotten the issue, but hopefully it gets resolved in some sort of a timely manner. I'd be pushing for a buy-back myself.

I haven't driven my ZL1 yet but I'm guessing it's guaranteed that I'll feel the rear end float.

Possible that both Ted's problem and the "floating" feeling are both related to a new fangled ELSD that maybe wasn't quite ready for production?

JANNETTYRACING · 04-09-2018, 11:48 AM

Quote:

Originally Posted by Can'tHave2MuchHP

Ted's issue is separate from the "Floating" feeling that some/all? ZL1 owners experience. Thankfully GM has gotten the issue, but hopefully it gets resolved in some sort of a timely manner. I'd be pushing for a buy-back myself.

I haven't driven my ZL1 yet but I'm guessing it's guaranteed that I'll feel the rear end float.

Possible that both Ted's problem and the "floating" feeling are both related to a new fangled ELSD that maybe wasn't quite ready for production?

Agreed, although mine is unique I feel it can be related.

*Mr. Wyndham* · 04-09-2018, 12:03 PM

Does it continue to "steer" left until you let off the throttle? Or does it jerk the car over at first, and then hold steady?

JANNETTYRACING · 04-10-2018, 10:06 AM

Update, back to the dealer yesterday afternoon, Tech hooked up a the MDI, and Service manager brought out some tech bulletins.

They wanted to verify the Steering sensor calibration as someone mentioned above, and it was fine, they did a calibration anyway.

NOTE to guys complaining about the Trammelling as GM calls it, or Wiggle on acceleration, there is a reprogramming update released March of 2018 to address this.

They applied this update to my RDCCM, Rear Differential Clutch Control Module.

They also found a code for a Clutch control command permanently failed.
I may have worded this incorrectly but that is how I remember it.

So They are trying to get an OK to order a new Differential.

Waiting

Can'tHave2MuchHP · 04-10-2018, 10:28 AM

Quote:

Originally Posted by JANNETTYRACING

Update, back to the dealer yesterday afternoon, Tech hooked up a the MDI, and Service manager brought out some tech bulletins.

They wanted to verify the Steering sensor calibration as someone mentioned above, and it was fine, they did a calibration anyway.

NOTE to guys complaining about the Trammelling as GM calls it, or Wiggle on acceleration, there is a reprogramming update released March of 2018 to address this.

They applied this update to my RDCCM, Rear Differential Clutch Control Module.

They also found a code for a Clutch control command permanently failed.
I may have worded this incorrectly but that is how I remember it.

So They are trying to get an OK to order a new Differential.

Waiting

This is great news! I wonder if my 2018 built on Feb 22nd, already has the updated software or should I have my tech's flash it...

Hopefully yours gets resolved! Sounds like you're on the right path.

JANNETTYRACING · 04-10-2018, 10:33 AM

Quote:

Originally Posted by Can'tHave2MuchHP

This is great news! I wonder if my 2018 built on Feb 22nd, already has the updated software or should I have my tech's flash it...

Hopefully yours gets resolved! Sounds like you're on the right path.

Well if it was released after your car was built I would venture to guess you do not have the latest program.

Ted.

*Mr. Wyndham* · 04-10-2018, 10:55 AM

Quote:

Originally Posted by JANNETTYRACING

Update, back to the dealer yesterday afternoon, Tech hooked up a the MDI, and Service manager brought out some tech bulletins.

They wanted to verify the Steering sensor calibration as someone mentioned above, and it was fine, they did a calibration anyway.

NOTE to guys complaining about the Trammelling as GM calls it, or Wiggle on acceleration, there is a reprogramming update released March of 2018 to address this.

They applied this update to my RDCCM, Rear Differential Clutch Control Module.

They also found a code for a Clutch control command permanently failed.
I may have worded this incorrectly but that is how I remember it.

So They are trying to get an OK to order a new Differential.

Waiting

Really cool! Were they able to provide any details about why that was happening, or what the recal fixed?

JANNETTYRACING · 04-10-2018, 11:03 AM

Quote:

Originally Posted by Mr. Wyndham

Really cool! Were they able to provide any details about why that was happening, or what the recal fixed?

Not a recall it is a bulletin, so they only apply the reprogram if someone complains of this wiggle thing.

I suspect is applies more even torque to the right and left clutches with a wider window of Steering angle.

Just my Opinion no facts.

Ted.

Jmueller · 04-10-2018, 11:03 AM

Quote:

Originally Posted by JANNETTYRACING

Update, back to the dealer yesterday afternoon, Tech hooked up a the MDI, and Service manager brought out some tech bulletins.

They wanted to verify the Steering sensor calibration as someone mentioned above, and it was fine, they did a calibration anyway.

NOTE to guys complaining about the Trammelling as GM calls it, or Wiggle on acceleration, there is a reprogramming update released March of 2018 to address this.

They applied this update to my RDCCM, Rear Differential Clutch Control Module.

They also found a code for a Clutch control command permanently failed.
I may have worded this incorrectly but that is how I remember it.

So They are trying to get an OK to order a new Differential.

Waiting

This is great news regarding the reflash. Bad news about your rear diff. Thank you so much for sharing the good news though! I can't wait to get it reprogrammed and give it a go highway... I mean track.

*Mr. Wyndham* · 04-10-2018, 11:06 AM

Quote:

Originally Posted by JANNETTYRACING

Not a recall it is a bulletin, so they only apply the reprogram if someone complains of this wiggle thing.

I suspect is applies more even torque to the right and left clutches with a wider window of Steering angle.

Just my Opinion no facts.

Ted.

Meant "recalibration", not "recall", my bad.

04-09-2018, 11:38 AM	#58
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,508 View My Garage	Duplicated issue is a huge plus... __________________

04-09-2018, 12:03 PM	#63
Mr. Wyndham I used to be Dragoneye... Drives: 2018 ZL1 1LE Join Date: Jan 2007 Location: Buffalo, NY Posts: 31,876 View My Garage	Does it continue to "steer" left until you let off the throttle? Or does it jerk the car over at first, and then hold steady? __________________ *"Keep the faith."* - Fbodfather

04-10-2018, 10:06 AM	#64
JANNETTYRACING Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009 Location: ON THE DYNO WATERBURY CT. Posts: 15,225	Update, back to the dealer yesterday afternoon, Tech hooked up a the MDI, and Service manager brought out some tech bulletins. They wanted to verify the Steering sensor calibration as someone mentioned above, and it was fine, they did a calibration anyway. NOTE to guys complaining about the Trammelling as GM calls it, or Wiggle on acceleration, there is a reprogramming update released March of 2018 to address this. They applied this update to my RDCCM, Rear Differential Clutch Control Module. They also found a code for a Clutch control command permanently failed. I may have worded this incorrectly but that is how I remember it. So They are trying to get an OK to order a new Differential. Waiting __________________ www.jannettyracing.com Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com

04-09-2018, 11:45 AM	#61
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	Ted's issue is separate from the "Floating" feeling that some/all? ZL1 owners experience. Thankfully GM has gotten the issue, but hopefully it gets resolved in some sort of a timely manner. I'd be pushing for a buy-back myself. I haven't driven my ZL1 yet but I'm guessing it's guaranteed that I'll feel the rear end float. Possible that both Ted's problem and the "floating" feeling are both related to a new fangled ELSD that maybe wasn't quite ready for production?

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