ducktape11

I'll try to adjust the cable tomorrow but my upshifts seem okay. It is having an issue downshifting from 3rd to 2nd now so I need to turn the TV screw in. I was looking at bat voltage and testing at each ground. I also did voltage drop tests on the cables wherever I could find cables and they were all 0.00v

Where should I add a ground? I disconnected the alternator and drove it with no changes. Let up on the pedal to around where it should be in lockup and push the pedal back and magic TCC lockup until I drop a gear...... Also I ran the multimeter onto all the grounds in the engine bay and they were all at battery voltage no drop.

I turned up the pressures to 75psi at idle and 110PSI WOT. I still need to let off the pedal and ease it back to lock up the TC and then it holds fine. Also I have to drop the pan again and adjust the TV screw because it's downshifting is horrible. I need to turn clockwise correct?? Where should I go from here for the TCC lockup symptoms. I'm kind of lost at this point. I'll clean up the body and frame grounds as well.

Tested line pressure at the accumulator port and showed: 64psi at idle 85psi at 1800rpm 95psi at WOT from what I can tell these are stock 47re numbers. I have a shift kit and aftermarket valve body at the minimum. Not sure on other internals. Shouldn't my pressures be 10-15psi higher? When I turned the screw last time I fear I might have turned clockwise instead of counter clockwise and turned my pressures down. That could have been when the issues started but I'm not sure as I didn't notice the TCC issues until I started towing my 14k lb camper last year. Add another body/frame cable from battery?

UPDATE Did the APPS reset and didn't change anything. It reads 0-100%. It is not very fluid though it jumps but like 7% at a time going up and down. Is is supposed to do that? Also is the INJ pump voltage supposed to be 12v or bat voltage? Driving around I couldn't get the TCC lockup unless I left off the accelerator to the RPM where it should be with TC locked then push back into it. After that it stays locked at all speeds even if I have to slow down and speed up as long as I stay in 4th. If I slow down enough for 3rd then I have to do it all over again in 4th. This leads me to believe it's a line pressure issue of not being enough?? I have messed with the pressures before but until today I haven't actually tested what they are. Once my gauge setup gets here today I'll get the hard data and drop the pan.

I'll double check the wiring. When watching it on scan tool it seems to be reading fine.

Yea I'll double check batteries tomorrow to make sure they are charged completely. But....... New info. Had to adjust down the voltage regulator because I got a 3rd gear start for the first time in a long time. That fixed that. I was driving around and figured out I can get the TCC lockup if I left off the accelerator to a bare minimum for a few seconds then go back to normal. The TC stays locked as I accelerate. I replicated it a few times before going home. If I go from a stop all the way into 4th gear staying on the pedal it doesn't seem to lockup. I never see that "5th gear" RPM drop unless it is locking with the 4th gear upshift. When I know it's in lock up speedo and tach seem to match so that's my confirmation of lockup. With this info I would think maybe it's a line pressure or APPS issue? I left the batteries disconnected for the night to do a APPS reset first thing in the morning. I also need to see if I have the right fitting to check the line pressures to see if they are too low or too high. Does anyone know the parameters for the PCM to allow TCC lockup? I can't seem to find it anywhere. I can not seem to ever get TCC lockup in 3rd gear unless I just don't notice it.

I tried measuring AC voltage with my meter but it's not that great. Even in mV AC setting it would jump between 100-500mV then go to 0 and stay.

I'll have to find it this afternoon. The weird thing is it does the CCD issues at any blower speed but if you disconnect the blower it only happens at face and floor selections. All other selections are fine. It leads me to believe either a ground is shorted or a wire is somewhere it shouldn't be.

Looking at all the grounds and such I didn't see a G107 I'll have to look at my hard copy manual. I did just see G123 that has compressor clutch and CCD - buss? Could that be it?

I figured it was due to the 4.10 gearing. Just sounds long because of the 2000-2100rpm shift The LED is a smart idea that should work great!!

Would AC noise cause no pickup? I don't have the typical symptom of lock/unlock. I need to figure out a way to watch the TCC lockup wire and make sure the PCM is grounding it. My scanner won't give me any transmission live data no matter what I do. Barely any ECU stuff. Also for the WT mod I put the grounds directly to the battery negative and not the block then the battery so I will do that as well.

I did the W-T mod already and the alternator and batteries are new. I saw 0.04v ripple DC from the alternator but I did not measure AC. I'll have to look at that tomorrow.

Also the transmission holds 3rd gear a long time but I believe that is due to the 3.54 to 4.10 regear. Won't shift to OD until 45mph unless I'm barely on the pedal.

Disconnected noise filter with no change in either issue. I have good battery voltage at the PCM red/white wire. Trans line pressure wire with fooler box goes to max voltage of 4.6v at idle I can go down to 3.2v and up to 4.6v. isn't that too low? I can only get TCC lock up sometimes as far as I can tell. Pushing on accelerator raises RPM much faster than speed so I'm guessing TCC is not locked Is this thing wire correctly? Shouldn't it be on the green/white wire for governor pressure?

Okay I'll look tomorrow. It does have the noise filter on there. I haven't checked the ripple on the new alternator.

So I've come to the almighty moparman forums seeking help on an unusual issue I'm having. My truck is heavily modified by the previous owner and I'm constantly having to fix one thing or another and chase things. So I have 2 issues now 1 of which I believe I know the issue but don't know a good fix. First issue is I get trans limp mode and a P1689 with no buss on the CCD when turning on the HVAC blower at any speed. Once turned off it goes back to normal. I have taken the ground off for the HVAC controls and the no buss issue also happens without the blower motor running only in face vents or floor vents position. Looking at wiring diagrams I can't tell where any of the HVAC would cross with CCD modules. Second issue I'm having is TCC lockup. I have increased line pressures and a DTT box to decrease the voltage to 4.5v all the time. It engages sometimes but not others and the only way I can tell is just by RPM at 60mph. It's 1 tick below 2000rpm with 4.10 ratio rear. I believe maybe the DTT box is bad or the line pressures are too high? What is the TCC lock up algorithm? Sometimes if I left off the pedal and slowly accelerate it will be locked. It's easier to tell if it's locked when I'm towing which is what I use the truck for. Thank you for any help! I'll provide any info y'all need and hopefully I can get this all figured out! Edit* forgot to mention I have done the following things to try to fix both issues. PCM grounded to pass side battery negative W-T mod New batteries and alternator Disconnected a/c relay and compressor( didn't fix so I guess it's not in the a/c circuit)