thanks for this..my 6l80 has been haunting me in my nightmares at this point. i’m unsure if it’s related but upon watching this video of yours i noticed a similarity… i have a harsh 3-4 shift (this is what brought me here) - i also have very slightly delayed drive & reverse … the kicker is …. i have 4 trans codes …… they are - - TRANSMISSION FLUID PRESSURE SWITCH 1 CIRCUIT LOW VOLTAGE - TRANSMISSION FLUID PRESSURE SWITCH 3 CIRCUIT LOW VOLTAGE - TRANSMISSION FLUID PRESSURE SWITCH 4 CIRCUIT LOW VOLTAGE - TRANSMISSION FLUID PRESSURE SWITCH 5 CIRCUIT LOW VOLTAGE all of the same switches that you show as having broken seals in your video…. maybe unrelated … but that’s unlikely. no such thing as coincidence. ill keep wracking my brain. & learning along the way. i am a first timer with this auto repair… i figure no better way to learn than on my 2007 gmc yukon denali 6.2 that’s on a last leg anyway so i can only really make things better at this point … & gain some knowledge too. & for what it’s worth - as someone with autism & other learning disabilities which make understanding/comprehension & retention very, very difficult - i wanted you to know that you absolutely do have a natural ability to teach & in a way in which even someone like me can follow the lesson & understand .. & that is extremely hard to do on a general basis for me … so for something that i’ve been so dedicated to figuring out, solving & repairing … your videos are a breath of fresh air.

I always replace the films as a matter of overhaul. The PCS's give a response to the TECHM so cleaning with electronic contact cleaner keeps the open resistance consistent. BTW your 35R leak tool was the best money I've spent in years!

I just saw your video you made an hour ago. Don't let ignorant assholes who may comment get you down and make you stop making videos. I just rebuilt my 6l80 out of my 2011 suburban and if it wasn't for videos like yours and a few others on KZfaq, I never would've been able to. Or it wouldn't have worked. Guess what. Got over 250 miles on it and working good. Thank you for your Desire to help me. You have helped me. Your KZfaq community needs you and any haters are just pathetic idiots with no life who pretend they know more than you, but have no common sense and can't rebuild a transmission themselves or they wouldn't have to watch your videos. Keep going, ignore the idiots. They get you down is their goal, and what they want. Don't let them win, they don't deserve a response.

I have a 6L80 in my 08 Ls3 Corvette and I like racing it once in a while. It runs great at the track but for a few years now while cruising spiritedly it likes to over rev as it enters 4th gear. For years I have been living with this thinking it's the clutches might need to be replaced. I have always been doctoring it up with Hp Tuners but never solving the problem. Finally I have increase the torque inertia up to 2.0 from 1 on just 4th gear. The first 3 gears were hitting harder but the 4th gear was even worse. Real bad. Then after about 20 minutes of relearn and doing some rapid paddle shifting back and forth from 3rd to 4th it starting shifting like brand new!. Thanks for the vid. Reaffirms my thinking It's a valve body problem if it ever slips entering 4th again. These transmissions are as over complicated as a F-35 lightning! Thank goodness the previous owner had it tuned and the tuner had turned off VVT and everything else that would have kept the clutches and converter churning into dust even while cruising.

Can you spray break cleaner in there and use air compressor to clean it? Or is it too delicate for that type of cleaning? Is there a recommended way to take it apart and clean?

Good catch 👏

ALWAYS HELPS...THANKYOU

love seeing these 6l80 videos. i have 6l90 in myy 08 suburban. trying to figure out why it sometimes flare shifts from 3rd to 4th.

Saludos desde Venezuela excelente video

Now we know which switch is which switch to switch the witch switch

How else can I test those

Let us know if this takes care of the concern!

How to find solenoids for replacement)

Are you planning on making new videos?

Ohh yeeahh this is great !

Did you ohm them out to see if any of the solenoids were bad or were they all reading around .5 I ask cause I have one that’s shooting up to 30.05 after breaking the connection with the switch . It’s solenoid five the clutch pressure control solenoid and I think the tcc pressure was throwing some weird numbers as well . But I got the p0741 tcc solenoid stuck off and trans went to fail safe I had to limp it home with my scanner using hp tuners. Which in my ASE 6l80 book that’s the death code for the techm lol but any thoughts if you get to read this and thank you for the video .

I will be emailing you with a question

Would there be a solenoid issue in TChM of truck doesn’t register neutral on dash indicator? Neutral is there but when you click from reverse into neutral the dash indicator goes from R to D skipping neutral.

Richard plz completes

Hello, Sir. How much pressure are you using to test the switches? Thank you.

Could you double up the switch films to make them more durable do you think

Hello! Is there anyone I could buy one of your homemade testers for the switches🙏

is there any gaskets to replace after doing this repair?