Project Carbon Next Gen 10 Speed Valve Body Kit

[viven44]

I hear you...There is never a good time unfortunately... but a good window where you can do mindless peaceful work is key... Working under pressure has often got me in trouble. A few weeks ago, some pending preventative work, all I was supposed to do was swap out the old distributor on my truck when I had exactly 30 mins before some family commitments so I was working with a sense of urgency...I pull the distributor and the cap retaining clip fell inside the block and wedged itself somewhere my magnetic pickup tools or borescope could not find... after an hour of struggle I decided to drop the pan and retrieve the clip..... turned a 20 min job into a 3 hour job.. Fun !!

 

[Kobot]

I watched that interview with The Car Guy and the Next Gen engineer the other day which led me to this thread after researching the issue. Just when I thought I was done spending money on this truck, I find out about this and I’m now considering the upgrade. It’s either dump money into this truck to keep it long term or dump money on a new one that will have issues later. I have a 19 with the 10L80 but it seems the Next Gen Project Carbon kit is still the same aside from the manual shift linkage. I’ve read every word in this thread so far and following for more info.

 

[jfoj]

@Kobot,

Yea, the deal is you drop $80k+ then you need to start spending.

Understand that I used to rebuild transmissions on a small scale for my vehicles and friends and some customers. 3, 4 and 6 speeds. Have not done any for a while. The bulletproof one were the older GM TH400 and Ford C6. The STUPID valve body separator plate that is too thin for the pressure it needs to seal and the fact they have the stupid thin paper gasket and screens, this is just a BAD IDEA. All the transmission work I did over the years had thick steel separator plates with no gaskets and no problems. So I know this is something that will solve at least the internal valve body fluid leaks. Along with the upgraded shift valves these just higher quality parts that should last longer without as many problems.

Based on what I learned over the years and reading about all the transmission problems I determined it was wise of me to invest close to $2k in the transmission valve body. My expectation is it is not IF but WHEN.

While I have a 2024 which was not under the transmission Recall, I have read about a lot of 2024 and 2025 that also have the same problems. They are no different than the 2021-2023, they just were not built when the Recall was released. I expect the 2024-2025 to be Recalled, but GM is trying to cover the turd in the catbox by updating the TCM software to put the transmission in Limp mode (45 MPH max) if the trans applies 4 clutches at one time.

Then the fun starts. How far are you away from home? How far to the nearest dealer? How many family members are in the truck with you? Were you going on or returning from an event with luggage and gear? Were you towing something? How long to wait for a reman valve body? How long before the reman valve body have the same problems? Did the valve body put wear and tear on the clutch packs or torque converter due to low pressure, so do you really need a full transmission? How long are you in a sub compact rental car? When does GM quit reimbursing your for a rental?

Just too many questions and I do not want to wait more that an afternoon to have this problem resolved. The problem for me is my schedule is crazy for the next 7-10 days. I hope to jump on the project SOON.

I look at things this way. Some people buy a brand new truck, spend thousands on mods, wheels, tires, tint, lift, exhaust. I just want a reliable vehicle, something that does not leave me stranded or I am without for months on end. Granted at some point the valve body delay should decrease, but why should I even have to just sit back and WAIT FOR IT??

Will update once I get to the job. Yukon has 8,000 miles at this point, I need to get it done soon as the problems are worse when the fluid gets hotter and thinner, I have lived that nightmare on VW 6 Speed Tiptronics many years ago!