Hi all.

I've got the engine light on and further scan reveals P0740. I looked it up and know what it is, but looking through the threads, most problems and remedies are for the earlier trans. It also showed a Cylinder #6 misfire, so the plug was replaced. To bring everyone up to date, I had all the plugs changed with MOPAR copper plugs, changed the differential fluid and did a trans purge with both filters and fluid changed. (all MOPAR) Now this code is present.

I PM'd Master Tech and he asked about the Stall test. I don't know what that is exactly, but when I stomp the brake and give it gas for about 3 seconds, the rpm's go to 2000. The Durango drives normal, no jump in RPM's, no slippage, but I did notice a little drop in MPG from the last fill up. (almost 2 gallons) I had the code reset and it's back again the next day.

From what I've been reading, I'm leaning towards dropping the pan again, replacing the TCC Solenoid and while I'm in there (or whoever does it, just not the dealer) replacing the Govenor Pressure Transducer and Pressure Solenoid. I'll even have new filters and fluid put in again and it's not even 1000 miles old. Is a correct start?

I also read that a computer reflash could solve it. Any ideas are appreciated! Thanks.

SJ02

 

Symptom:
P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT
When Monitored and Set Condition:
P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT
When Monitored: During Electronically Modulated Converter Clutch (EMCC) Operation.
Set Condition: Transmission must be in EMCC, with input speed > than 1750 RPM.
TCC-L/R Solenoid achieves the maximum duty cycle and can not pull engine speed within
60 RPM of input speed. Also when the transmission is in FEMCC and the engine slips TCC
> than 100 RPM for 10 seconds. This DTC can take up to five minutes of problem
identification before illuminating the MIL.
POSSIBLE CAUSES
RELATED DTC P0750 PRESENT
INTERMITTENT WIRING AND/OR CONNECTORS
INTERNAL TRANSMISSION PROBLEM - TCC OUT OF RANGE
L/R SOLENOID INOPERATIVE
TEST ACTION APPLICABILITY
1 NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the service information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIIIt, read the engine DTC’s. Check and repair all engine DTC’s prior
to performing transmission symptom diagnostics.
With the DRBIIIt, read Transmission DTC’s. Record all DTC’s and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC’s, check and record all CVI’s.
Most DTC’s set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to Symptom diagnosis.

TEST ACTION APPLICABILITY
2 With the DRBIIIt, read transmission DTC’s
Is the DTC P0750 present?
ALL
Yes ! Refer to the Transmission category and perform the appropriate
symptom.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No ! Go To 3
3 With the DRBIIIt, Read and RECORD ALL Transmission DTC’s. After recording
DTC’s, erase DTC’s.
Drive the vehicle until the transmission temperature is at least 43°C or 110°F.
Perform the following steps 3 times.
Drive the vehicle at 80 km/h or 50 MPH.
Allow 4th gear to engage for at least 10 seconds.
Close the Throttle.
Tip back into the throttle until the TPS angle is between 25 and 29 degrees.
NOTE: If the throttle angle goes over 30 degrees, you must close the throttle
and try again.
Did the TCC engage (Engine speed approximately equal to input speed) during any
of the attempts?
ALL
Yes ! Go To 4
No ! Go To 5
4 The conditions necessary to set this DTC are not present at this time. Using the
schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wires while checking for shorts and open circuits.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wires while checking for shorts and open circuits.
Were there any problems found?
ALL
Yes ! Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No ! Test Complete.
5 With the DRBIIIt, check for other transmission DTC’s.
Are codes P1775 and P0841 present also?
ALL
Yes ! Replace the Transmission Solenoid/TRS assembly per the Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No ! Go To 6
6 If there are no possible causes remaining, view repair. ALL
Repair
Internal transmission problem, inspect the oil pump per service
manual information and replace if necessary. If no problems are
found in the Oil Pump, replace the Solenoid/TRS assembly also
replace the Torque Converter in either case.

If you have a 4.7 with a 45RFE. You don't have a governor solenoid or transducer. You have a solenoid pack. If the dealer replace the solenoid pack, did they use a reman solenoid pack? If they did, tell them to replace it with a new solenoid pack.

 

Thanks for the post Master Tech! Clear as mud. LMAO. J/K. Thanks for adding to the story, but they haven't done anything yet. I went to the dealer yesterday and they showed me the solenoid pack but I didn't get it yet. $340 for the part and a $110 diagnosis which will go towards the repair if they fix it. Any idea on the book labor rate to repair/replace? As I mentioned, the trans was just serviced last month, so should they reuse the fluid and filters or just opt for a new service as well? Thanks for your help!

SJ02

 

I called a local stealer and their diag rate is $89.95 with an hourly rate of $120.88. They say about 1 - 1.5 hours to replace the solenoid pack even with the trans pan dropped for a regular service. I questioned that since the pan would already be dropped and they said it is in the valve body. Getting hosed? Of course he said he'd want to diag it instead of putting the solenoid in that might not be needed. Sounds like it's going to be about a $700 job.

SJ02

 

Stopped by the shop that did the service last month and they gave me a contact that will do the swap for me for $250, if I bring the part to him. I may go that route, as when I was at the shop the other day, we were looking online at rockauto and saw the TCC Solenoid, but the new lead that will do the swap confirmed that it's now one bigger piece (Solenoid Pack), which I saw at the Stealer, and he's changed many of them before. Fingers crossed!

SJ02

 

Was on my way to the trans shop on Saturday morning when I looked down and saw the CEL was off. I stopped by my friend's shop and he confirmed that no codes were present when he hooked up his scanner, but when I cycled the key, it still displayed the P0700. CEL was still off.

SJ02

 

%*$!!

CEL is back on with the same code, so will be taking it back hopefully on Saturday to get it checked out. *!%&@

SJ02

 

Turns out that the Torque Converter is on it's way out. It's in the shop and will get it back this week.

SJ02

 

Thats great news.

 

Thanks Master Tech and the rest of the forum for entertaining my questions/concerns. I'll post back here once I get it back and drive it for a while.

SJ02