4l60e problems. I give up...
 

After my cam and converter install my truck ran fine for 2 days. I was driving to work and it let go and free revs when I hit the gas. If I shut it down and let it sit for a minute it goes into gear and shifts fine But trans will let go again after maybe 100 yards of driving.

No leaks. Fluid level fine. Fluid is clean. hooked a pressure gauge up to make sure line pressure was good and pump was pumping and everything is good.

Scan tool found a bunch of solenoid codes but I pinned the harness and everything is fine! Codes are: p0740 tq converter clutch solenoid, p0748 pressure control solenoid, p0753 1-2 shift solenoid, p0785 3-2 shift timing solenoid, p2761 tcc pcs solenoid.

What else can I do? Can this trans be saved or is it time to call it a day and buy a built 4l60e? even if i do buy a new trans it still bugs me i cant figure this out. 05 cam/stall/bolt on ecsb 4x4

How old are the solenoids? I'm a noobie still but have read they can wear out?

What kind of pressures were you seeing? Was the gauge hooked up while it was failing to move?

I Believe all the solenoids are original and I have 90k on the truck now,but I can't see all of them going bad at the same exact time...

My buddy was the one who checked the pressure so I don't know, but when this first happened I pulled the main plug on the trans to put it in limp mode and the truck drove for a little longer bc of the increased line pressure, but it still did the same thing after...

Sounds like a common wiring issue for all solenoids to be bad.

I've read that a leak of trans fluid into the trans connector can cause all sorts of issues.

Attachment 156839

I'll look into the connector. About to pull the pan and check the filter. Does anyone know how to check if its the TCM? Id hate to buy a new trans and have it be a tcm and I'd still be SOL

05 doesn't have a TCM, just a PCM.

Drop the panel under the column there is a harness that comes off the ign switch and goes to the drivers side fuse block. It has a white, yellow pink and a couple others in it. Backprobe the white wire while the trucks acting up see what the voltage on it is. If it has under 12V then it's ignition switch. That is the circuit that powers all solenoids in the trans pan.

It could be really simple if you didn't get the connector seated all the way when reinstalling the trans. Disconnect it and hook it back up push down until you hear and feel a solid click.

Yea I thought ignition switch too so I replaced it and didn't help. I ordered a new pcm and it should be here today hopefully. Gonna put that in and see what happens.