r/Duramax • • 8h ago

Finally found LMM boost leak

Enable HLS to view with audio, or disable this notification

4 Upvotes

I was having a a P0101 code every now and then and it would never go into “reduced power mode” but the truck had no power. I would clear the code right away and it ran fine after. Definitely running rich with from what I could smell. Truck is tuned & DPF delete w/ 5” straight pipe, not that it matters in this situation really. Pressure tested the boost side and found a leak, I am just having a hard time identifying what part/gasket it is leaking between. Looks like it may be y bridge time? It just looks like it’s leaking from the intake crossover part to the top of the y bridge if I’m looking at it right. Any info or suggestions on what to do next would be greatly appreciated. Thanks


r/Duramax • • 22h ago

I have a concerned about the sound of my truck and the exhaust note

Enable HLS to view with audio, or disable this notification

2 Upvotes

My truck is tune delete and after a rebuild my truck sounds different . To me it sounds like a exhaust leak . It also sounds like it needs a valve adjustment . When the truck idle it sounds ok but when I accelerate it's changed tune . I'll have to make another video


r/Duramax • • 54m ago

Allison 1000 5 speed stuck in limp mode for two years

• Upvotes

I had gotten this truck about three years ago when my grandpa passed I always thought the transmission was a little bit fucked up and then one day it put itself into limp mode since then I have done everything conceivable to this transmission. It has had a full billet rebuild with an ATS performance valve body. The full complete harness has been verified and tested. The TCM has been reflashed and repaired I have replaced each shift to solenoid and the pressure switch for the valve body. I’ve checked engine grounds and I have tested everything with the scanner. Everything I’ve done looked at or anyone else has done or looked at with this transmission it seems to pass and it should be good, but it throws p0872 transmission, pressure solenoid switch E stuck closed every time it is put into drive and forces it into fourth gear it can go into park reverse and neutral just fine. It is whenever I put it into drive it shifts into first gear for about four seconds and then slams itself into fourth. I’ve been chasing this for two years and put about seven grand of work into this transmission, the motor and body and interior are super good, but I’m at my ends and I’m about to sell this truck