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Hey guys, I've been scanning through some of the recent threads and it looks like most of the gang is still hanging around. I've been too busy to stay involved lately, Atleast as much as I used too, but Tex and I are still around and doing fine (well, mostly).
My work truck is a 1 ton dodge dually with a 6.7 cummins and a DeF system, which means it was in the shop, so Tex and I were pulling a trailer round trip from east Texas to Pittsburgh and back, about 19 hours each way straight through. The first 3/4 of the trip went smoothly, tex performing like a champ with a current 256000 miles on the clock. Trans temp never got above 160. About 2AM Monday morning (guess that's today actually...) just east of Little Rock, cruise set at 70 on flat ground following a line of big rigs, the TC unlocks. I immediately knew that's what it was.
I tapped the breaks to turn off the cruise control, tried to get it to lock back in but no dice. I turned the O\D off and noticed the light flashing, so I know there's a code, but I still haven't broken down for AE:/. I pulled off at the next exit and shut it down, cranked it back up, checked fluid which looked fine (good level, color, and smell), and got back on the road. Right after it shifted into third, when it generally locks, the O\D light started flashing again. Other than the lack of lockup, there appeared to be no issues.
I had pretty much resolved a while back that the trans was on its way out, only a matter if time. Whether it gives out now or 2 years from now, I won't complain with the miles and work that it's done. So, I slow down and decide to keep going, keeping an eye in the temp gauge once every 3-5 seconds. I didn't really have a choice as I had to leave out for Utah (in the dodge which is out of the shop) by noon today, with the same trailer that I was pulling.
I made it home just fine, about 250 miles. Not once did the trans temp get above 160. Anyway, to my question: I won't be able to set eyes on Tex again until sometime next week, let alone put a scanner on him. I'll probably order AE from Clay and have it sitting at the house waiting for me when I get back. In the meantime, any ideas?
I'm really just interested in a list if possibilities. Worst case would be a blown converter which throws trash into the trans and trashes the whole thing, but 250 miles of interstate lean me away from that diagnosis from now.
Sorry for the late response, it's been a long week. Made it home about 3 yesterday afternoon. I didn't order AE for it to be here waiting on me, so I'm still flying blind. My guy is leaning towards a bad solenoid, but I'm not sure if I will replace it first or wait for AE (or make a trip to Arlington this weekend for TKeg's offer...) I'll update when I know something new.
For the record a scangauge 2 won't read transmission codes. I ordered AE with overnight delivery, so if the time difference from Texas to Oregon is enough, it may be here tomorrow.
P1876 Transfer Case 2-Wheel Drive Solenoid Circuit Failure
P1832 Transfer Case Differential Lock-Up Solenoid Circuit Failure
Airbag
No diagnostic codes retrieved
Hybrid Electronic Cluster
U1059 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL
U1058 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL
C1284 Oil Pressure Switch Failure
U1262 SCP (J1850) Communication Bus Fault
B1352 Ignition Key in Circuit Fault
Park Aid
No diagnostic codes retrieved
Overhead Trip Computer 2
P0500 Vehicle Speed Sensor A
B1203 Fuel sender Circuit Failure
Enhanced Powertrain
P0743 Torque Converter Clutch Circuit Electrical
P0741 Torque Converter Clutch Circuit Performance or Stuck Off
P0541 Intake Air Heater A Circuit Low
I cleared the codes and made a run, recording a bit of data. I'll post that up shortly. I highlighted the concerning portions in red. Any thoughts on what this points to?
Here are the codes that popped back up after a 5 minute run.
Generic Powertrain
No diagnostic codes retrieved
Anti-Lock Brake
No diagnostic codes retrieved
GEM/Central Timer
P1876 Transfer Case 2-Wheel Drive Solenoid Circuit Failure
P1832 Transfer Case Differential Lock-Up Solenoid Circuit Failure
Airbag
No diagnostic codes retrieved
Hybrid Electronic Cluster
B1352 Ignition Key in Circuit Fault
Park Aid
No diagnostic codes retrieved
Overhead Trip Computer 2
No diagnostic codes retrieved
Enhanced Powertrain
P0743 Torque Converter Clutch Circuit Electrical
P0741 Torque Converter Clutch Circuit Performance or Stuck Off
P0541 Intake Air Heater A Circuit Low
I'm pretty sure the two to be concerned about are the P0741 and P0743.
During the run, I noticed two things:
First: the Torque Converter Clutch - Modulated kept spiking and then going back to zero. It continued this the whole trip. Here is the graph:
The second thing I noticed is the "Vehicle Speed" gauge in AE was selected, but only went from 0 to .3. I checked and it is in MPH. The speedometer on the dash went from 0 to around 60 like normal. It may not be related but worth mentioning.
Right now I am leaning very hard towards the solenoid pack. Ford is showing around $450 online, while the Irish have one for $320 (I'm assuming this is the solenoid that you mentioned Mark, or is there another?): PowerTorque® TE140 - Solenoid | O'Reilly Auto Parts
Any input would be great. I hate throwing money at something unless I am sure. I haven't seen any way to test this solenoid, but I'd be willing to drop the pan and troubleshoot it if anyone has specs on how to do this.
Can you make a scan with the Torque Converter Clutch - Modulated, torque converter slip (it is called SLIP_ACT in the software. I have no idea what AE calls it, or if it is even available on AE,) and throttle position.
From what you've shared I don't see how you have concluded it is the solenoid. I can't make that conclusion yet. It is more likely to be a wiring problem between the PCM and the solenoid.
Can you make a scan with the Torque Converter Clutch - Modulated, torque converter slip (it is called SLIP_ACT in the software. I have no idea what AE calls it, or if it is even available on AE,) and throttle position.
From what you've shared I don't see how you have concluded it is the solenoid. I can't make that conclusion yet. It is more likely to be a wiring problem between the PCM and the solenoid.
I cannot, and here is why: I pulled the solenoid pack about an hour ago. I would simply reinstall but i'll have to wait for FORD to open at 9 to get another paper gasket (if they have it in stock). My plan was to pull it so it would be easier to test.
I'm going through the diagram now to check the pinout on the connector.
I will say that there is a considerable amount of rust on the paper gasket from the surface above it. This was likely caused from coolant that entered through a bad radiator about a year ago. Or from some other issue in the past 12 years...
Correction, when I made the run yesterday, I also recorded "torque converter slip actual" as well as engine rpms and output shaft speed. I did not record throttle position however, but here is what I have. again, vehicle speed only reported as 0-.3.
Edit: The modulated state would not go on the same graph without making it much larger. I reposted the graph here to make them closer.
That doesn't show the signal to the solenoid. That's what you had in the first graph. I will have to assume that it was calling for lockup and that it didn't happen. It is still a stretch to assume that the solenoid is the problem, but you may be right.
Check the resistance of the solenoid. I don't have the spec, but if I remember it correctly it should be 10-20 ohms. You can also put 12 volts across the solenoid and feel and listen for it to move internally. If you put 12 volts across it and nothing happens, then it's bad. If it has an open electrical circuit it's bad. Same for having no resistance. If it clicks with 12 volts across it you need to investigate the wiring.
Last edited by Mark Kovalsky; 06-29-2014 at 08:14 AM.
Reason: Corrected resistance value. Thanks, mueckster!
Here a scanned page, from my ATSG manual, of the connectors and the pins you need to check resistance across. PWM TCC solenoids should 10-20 ohms. EPC is 3-5 ohms. Solenoid Pack Pins.pdf
06-17-2014, 06:53 PM
. Here's what I've got:
