[Roddrz]

Roddrz posts concerns results and experience with a Camaro 2LT and the 10L60 transmission experiencing cooling system inefficiencies.

The shared results for the valve body upgrade are only to serve as a learning example across all models.

Sharing transmission temperature data enables comparative analysis between different Camaro models.

For A10 transmissions modifications, the upgrade order follows valve body first, then torque converter.

The current recall software upgrade does not address the root cause of transmission lock-up issues, which stem from valve body failures.

GM has not implemented a hardware-based valve body solution to resolve this fundamental problem.

Subsequent posts will concentrate on sharing next steps, specifically addressing the root cause of the recall notice.

A decision was made to prioritize reliability by upgrading the valve body rather than pursuing performance enhancements.

Roddrz discussions will try to remain focused on the issue rather than exploring performance modifications.

[FlukeSS]

Originally Posted by Roddrz

Roddrz posts concerns results and experience with a Camaro 2LT and the 10L60 transmission experiencing cooling system inefficiencies.

The shared results for the valve body upgrade are only to serve as a learning example across all models.

Sharing transmission temperature data enables comparative analysis between different Camaro models.

For A10 transmissions modifications, the upgrade order follows valve body first, then torque converter.

The current recall software upgrade does not address the root cause of transmission lock-up issues, which stem from valve body failures.

GM has not implemented a hardware-based valve body solution to resolve this fundamental problem.

Subsequent posts will concentrate on sharing next steps, specifically addressing the root cause of the recall notice.

A decision was made to prioritize reliability by upgrading the valve body rather than pursuing performance enhancements.

Roddrz discussions will try to remain focused on the issue rather than exploring performance modifications.

Ya the 2LT I am not sure might be vastly different to the SS and ZL1's in that regard. Makes sense now.

I didn't mean to devalue the post contribution, just didn't understand why the cooler upgrade was necessary. Now I understand the 2LT is different than the SS/ZL1 to that extent.

[Devstrike]

How do I tell if I have the Gen 1 A10 or the Gen 2?

[roostere4]

Originally Posted by Devstrike

How do I tell if I have the Gen 1 A10 or the Gen 2?

💯

Work also love to know if anyone can share

[FlukeSS]

Originally Posted by Devstrike

How do I tell if I have the Gen 1 A10 or the Gen 2?

Originally Posted by roostere4

💯

Work also love to know if anyone can share

Me3.

Still trying to figure that out myself.

[Roddrz]

How to Determine Generation 1 vs Generation 2 Transmission Types.

Note: This short summary applies to 10L90 and 10L60 transmissions, though the list is not comprehensive or definitive.
Hope this helps.

1. Recall Check
Search your Vehicle ID number in GM's recall database.
A recall notification typically indicates a Generation 2 Valve Body

2. GM Parts Check
Request the GM Service Department for the Valve Body Part Number and Diagram

3. Production Timeline
Reference Diagram Gen 1. vs Gen 2. for year-specific differences.
Note that vehicles produced between 2019 - 2020 may have either generation due to overlapping production periods

4. GM Part Number Verification
Compare your vehicle's specification against RockAuto and GM Parts databases to match part numbers and visual references

10 speed: 2019 - 2024

6.2L - 10L90
Gen1: 2018 - 2020 - GM (19433862) (no pictures to confirm)
Gen2: 2021 - 2024 - GM (24047994)

3.6L - 10L60
Gen2: 2020 - GM (24065346)
Gen2: 2021 - 2024 - GM (24065351) (no pictures to confirm)


Gen. 1 vs Gen. 2

[Bumbleboy92]

Production dates April 15, 2019 - June 28, 2022

https://static.nhtsa.gov/odi/rcl/202...5V148-9249.PDF

[Chris357]

It doesn't appear that there's anything that can be done preventatively to slow the onset of this, short of just not driving the car.

I'm out of the woods on the ZL1 (2018) but I daily a 21 CT5-V (10L80) and got the recall notice last week.

[Patriot Motorsports USA]

Everyone is getting these transmissions confused.

Just because it says "A10" does not mean the ZLE which is a 10L90E and shares none of the VB parts that the trucks or NA Camaros have.

To confirm this, I went by my local Five-Star GM Service Dept since my VIN triggered the recall letter due to it being an "A10" but being the ZLE I was told the recall did not apply to my vehicle.

Another interesting note, the 2019 A10 in Project Shocker has a completely different trans pan made out of steel vs the aluminum pan on my 2021 ZLE.

[Roddrz]

Originally Posted by Bumbleboy92

Production dates April 15, 2019 - June 28, 2022

https://static.nhtsa.gov/odi/rcl/202...5V148-9249.PDF

Thank you Bumbleboy92! The Safety Recall Report proves all A10 Gen. 2 are impacted. I'll explain why.

Originally Posted by Chris357

It doesn't appear that there's anything that can be done preventatively to slow the onset of this, short of just not driving the car.

I'm out of the woods on the ZL1 (2018) but I daily a 21 CT5-V (10L80) and got the recall notice last week.

Chris357, continue following this post and updates from Roddrz for a solution.

Originally Posted by ZLElvira

Everyone is getting these transmissions confused.

Just because it says "A10" does not mean the ZLE which is a 10L90E and shares none of the VB parts that the trucks or NA Camaros have.

To confirm this, I went by my local Five-Star GM Service Dept since my VIN triggered the recall letter due to it being an "A10" but being the ZLE I was told the recall did not apply to my vehicle.

Another interesting note, the 2019 A10 in Project Shocker has a completely different trans pan made out of steel vs the aluminum pan on my 2021 ZLE.

ZLElvira, All A10 Gen. 2 transmissions are impacted. The Safety Recall Report that Bumbleboy92 posted is the proof in writing.

Based on a review of the nhtsa recall report and speaking with Next Gen Drivetrain

Page 2 of recall report: Production dates April 15, 2019 - June 28, 2022

Page 4 of recall report: 2023 model year Chevrolet Camaro vehicles were built with new transmission control software that detects excessive wear.

GM A10 Gen. 2 Transmission Issue Summary

Problem: Valve body hardware defect in GM A10 Gen. 2 transmissions

GM's Solution: Software update activates "limp mode" when pressure drops (masks symptom, doesn't address root cause)

Risk: Transmission may be irreparably damaged once limp mode engages


Comparison of valve body's feed limit valves in photo:

• Left: Original feed limit valve design
• Middle: GM's updated valve body (harder material, but prone to seizing/warping)
• Right: Next Gen Drivetrain feed limit valve (enhanced with harder material and o-ring seals)

Note: GM's recent OEM 10L1000 valve body update, while using slightly harder materials, does not fully resolve the underlying issue.

Better Solution - Next Gen Drivetrain Valve body kit

Features improved valve body with:

• Enhanced material hardness
• O-ring seals replacing metal-on-metal contact

Service Intervals:

• Regular maintenance requirement: 25,000-mile transmission fluid flush to protect o-rings
• High-stress applications: More frequent service recommended
• Highway-only use: Intervals can be extended moderately

Implementation Schedule:

• Valve body kit ordered: March 13, 2025
• Installation date: March 29, 2025
• Documentation: Before/after photos to be taken

[taylorforschool@gmail.com]

Originally Posted by FlukeSS

GM's idea of a fix for this issue when you bring it into the dealership?

Replace the defective valve body with the same defective valve body. Its why people have their trans taking a shit right after they get them "fixed" by a dealership.

There is no mileage buffer either. Some reported issues have cars with 3000-5000 miles on them, and others with 120,000 miles having the issue.

Still not sure why the issue doesn’t include 2018. All of this recall screams exactly what I experienced with my transmission.

[radz28]

Originally Posted by taylorforschool@gmail.com

Still not sure why the issue doesn’t include 2018. All of this recall screams exactly what I experienced with my transmission.

Maybe yours was just a fluke?... I hope.

Looks like this is next on the mod' list, lol... Boo. I missed the valve spring BS, and maybe the oil pump crap (and this seems a lot less intensive), so there goes a little mod' money. At least we know what the issue is, and there is a fix. It would be better if GM were to do it, not that I trust a service department.

[FlukeSS]

Originally Posted by radz28

Maybe yours was just a fluke?...

I thought that was mine?

Sucks, just got the car running good again, and now I should not drive it because of this... :/

Although technically this doesn't exclude the dragstrip since I never get to 8th gear at the strip anyways.

ing for an excuse.

[Roddrz]

I purchased an electric transfer pump for a complete auto transmission fluid flush.

Shopping for the necessary fittings (AN connectors and barb adapters) takes 4 hours, and setup is 1 hour, the actual fluid swap is remarkably quick - just 2 minutes.

To make future fluid changes easier, I'll install a new drain plug in the pan.
I'll share part numbers for the equipment and special fill adaptor to fill the pan.

After you make the investment into the equipment, future fluid transfusions are easy.

The process is straight forward:

• Bypass the thermostat permanently, as instructed when upgrading the valve body.
  (Heating a transmission to operating temp is not difficult to do, cooling the tranny is the goal)

• Prime the system - Drain and use pump to fill the pan with new fluid

• Locate an access point in the transmission line for the pump (connection to cooler)

• The pump brings in the new fluid, while the used fluid exits the access point (connection to cooler line)

• Run both the engine and pump to complete the exchange.
  (Have a buddy cycle the transmission through Neutral - Reverse - Drive, while braking)