05-20-2024, 08:08 PM | #1 |
ZLB1LLY
Drives: 2017 Camaro ZL1, 2019 Lexus GX460 Join Date: Mar 2021
Location: Minnesota
Posts: 14
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A10 Service?
Hello forum friends. I’m a bit of a lurker and not a regular poster. I have been searching for this information and haven’t been successful.
I have a 17 ZL1 a10 w/ 25k miles, summer toy only with an occasional HDPE. Noticed lately that the 3-2 downshift in manual mode is unusually harsh. Also getting some violent low speed surges. I’m clearly out of warranty but any ideas on what this might be? Is this the transmission, or the diff? Does it need a service? |
05-20-2024, 09:38 PM | #2 |
PKG4U
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Especially the gears you are discussing has me worried. You should do some digging on the threads I have posted and the nightmare I went through with GM during Covid getting my repairs done under warranty. As much as many on the forums here would like to disagree with me, there are documented issues with the 10-spd across almost every GM platform. They aren’t very common but at this point I would say bulletproof is quite a stretch.
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2020 Camaro LT1. Bought 10/2020 | GM PERF. CAI | GM Muffler Delete (Performance Exhaust 4” tips). | SOLD 1/2022|
2018 ZL1 Summit White | Bought 1/2022 | PDR, Recaros, Carbon Dash, WeaponX Hx System, Apex SM-10 in ZLE fitment w/PS4S Mods after Warranty “Imma keep it stock” |
05-20-2024, 10:21 PM | #3 | |
ZLB1LLY
Drives: 2017 Camaro ZL1, 2019 Lexus GX460 Join Date: Mar 2021
Location: Minnesota
Posts: 14
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05-21-2024, 09:48 AM | #4 |
Snackbar Tuning
Drives: 2023 SGM ZL1 Join Date: Oct 2016
Location: Florida
Posts: 1,288
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Did the battery recently die? If the TCM learning was reset then it will down shift rather harshly for a couple of drives.
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GM Gen V Calibrator
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05-21-2024, 04:22 PM | #5 | |
ZLB1LLY
Drives: 2017 Camaro ZL1, 2019 Lexus GX460 Join Date: Mar 2021
Location: Minnesota
Posts: 14
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Quote:
Being the OE battery was ~7 years old I put a new one in. I never noticed any problems before until this year. I didn't know that was a thing. |
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05-21-2024, 05:05 PM | #6 |
Drives: 2020 Chevy Camaro ZL1 Join Date: Apr 2023
Location: Calgary Canada
Posts: 1,629
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With the several computers running this car, it can act like a baby with new teeth. Very finicky.
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05-21-2024, 05:47 PM | #7 |
Drives: 2022 Camaro LT1 A10 Join Date: Nov 2015
Location: new england
Posts: 394
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Does disconnecting the battery also reset the TCM learning?
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2022 Camaro LT1 A10 - Drag Pack/AxleBack -11.849@118.67MPH/1.798 60' 2001 Camaro SS A4 - HCI/Stall/Bolt-on/Gear/Tune/DR/Diet - 429HP/392TQ - 10.99@123.58MPH/1.584 60' 1998 Camaro Z28 A4 - Bolt-on 1999 Camaro Z28 A4 - Stock FJB |
05-22-2024, 12:27 PM | #8 |
ZL1 Believer
Drives: 2019 Camaro ZL1 Join Date: Oct 2020
Location: Bangkok, Thailand
Posts: 536
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This is good to know....
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05-22-2024, 01:27 PM | #9 |
Drives: 2023 ZL1 - Modified All Bolt On's Join Date: Dec 2022
Location: Columbus, Ohio
Posts: 692
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I had a similar issue when my battery died over the winter. I had it on a battery tender, but someone (I think my middle kid) unplugged the power stirp it was plugged into to charge a USB device! My car just didn't drive right the first two times I had it out. Even got a lot of scary warning message on the display like, rear axle disabled, body control module lost communication etc. etc. Then I got a fully charge on the battery over about a week long period and the 3rd time I drove it, it was as normal as could be.
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2023 ZL1 Auto - CSP 2" Long Tubes by Stainless Works | Gesi G-Sport High Flow CATs | Stainless Works Legend NPP Axle Back | Roto-Fab Big Gulp | Kong NM103mm | Kong X-Port | Griptech 2.3" Upper | ATI Super Damper w/9.45" (18%) Lower | TooHigh PSI Port Injection w/Siemens 875cc Injectors | Brisk RR14S Plugs | Granatelli Malevolent Coil Packs | Katech Low Profile Billet Valve Covers | Katech Duel Fuel Pump System | MightyMouse Wild 1000HP CC | DSX Flex Fuel Kit | DSX Billet Lid | DMS 2gal Fender Tank | Unlocked T93 TCM | NT555R2's 285/305 | Katech Tuned | Straight E85 = 784rwhp / 678rwtq @ 19psi
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05-22-2024, 03:14 PM | #10 | |
ZLB1LLY
Drives: 2017 Camaro ZL1, 2019 Lexus GX460 Join Date: Mar 2021
Location: Minnesota
Posts: 14
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05-24-2024, 11:11 PM | #11 |
Drives: 6th Gen LT1 Join Date: Jun 2023
Location: Southeast
Posts: 312
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05-24-2024, 11:14 PM | #12 | |
Drives: 6th Gen LT1 Join Date: Jun 2023
Location: Southeast
Posts: 312
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Quote:
ECU most probably adjusts the throttle curve a little bit, and TCM relearns the wear of the clutches/fluid. Basically calculates the position/delay where the clutches actually engage. Some other cars have a learning procedure instead of this. |
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05-25-2024, 07:32 PM | #13 |
Drives: 2022 Camaro LT1 A10 Join Date: Nov 2015
Location: new england
Posts: 394
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Thank you. I guess I should stop disconnecting
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2022 Camaro LT1 A10 - Drag Pack/AxleBack -11.849@118.67MPH/1.798 60' 2001 Camaro SS A4 - HCI/Stall/Bolt-on/Gear/Tune/DR/Diet - 429HP/392TQ - 10.99@123.58MPH/1.584 60' 1998 Camaro Z28 A4 - Bolt-on 1999 Camaro Z28 A4 - Stock FJB |
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