I’ll start as simple as i can, we can expand as this thread goes on.

Basically, i am familiar with the AC interference issue and have “fixed” that by following the WT tutorial.

I rebuilt the transmission myself a few years ago and can’t completely rule out a valve body issue. I think a piece of debris could have made its way into the TCC plunger somehow and scored the bore it rides in, and when I rebuilt it i reused the same oil pump and valve body and torque converter. This problem didn’t show up right away and instead took a while to start happening.

Ive got a quadzilla installed in the truck currently.

Im experiencing a weird intermittent problem. It manifests through torque converter lock/unlock but does not follow the same rapid speed that AC interference does. Its much slower and completely unpredictable. Only happens in 3lock or 4lock but will happen at any speed (35-85mph) that those gears can be used.

Last week i hopped in to go to work and it was behaving as though the MAP sensor was unplugged, was not registering boost through the quadzilla, I hadn’t connected to the iquad in a while so I also noticed at that time that i had no fuel pressure reading. I unplugged and replugged those connectors and the truck ran perfectly for the next week, now its back to the same behavior. I thought, wow what a coincidence that both sensors use the same round 3 pin (deutsch?) connector, got some contact cleaner and dielectric grease and got no improvement. Still no fuel pressure reading so it may have been hammered to death and just needs to be replaced. Also using an aftermarket MAP sensor thats been installed for probably 7 years now.

A few weeks ago i got a multimeter out and confirmed that the TCC solenoid is giving the appropriate resistance and that I do have continuity through that whole circuit.

I have an autel ml629 scanner and am not seeing anything obvious in the live data nor do i get any relevant codes. I only have a code for grid heaters as i have them disconnected because the leads melted and i didn’t want a fire hazard.

Im hoping someone has insight before i order a valve body from randys transmission, its an expensive dart to throw at a problem that so far seems to be possibly related to the MAP sensor as well.

Maybe there’s a ground circuit I need to look at? Ive got really good battery terminals (napa military style) and oreilly brand marine deep cycle batteries.

Edited Sunday at 05:19 PM1 day by 2000Ram2500

3 hours ago, 2000Ram2500 said:

I have an autel ml629 scanner and am not seeing anything obvious in the live data nor do i get any relevant codes.

What about temporarily testing with a Voltmeter? Connect one lead to the OR/BK wire from terminal #11 at Connector #2 PCM connector and the other lead to ground and go for a test drive. When TCC is unlocked - 12 volts should be present. With the TCC locked - 0 volts should be present. You might get some useful information with this test and it doesn't cost anything to perform.

• John

I’ll find my alligator clips and give it a whirl. Might be a couple days I’ll check back in with what i find