Torque converter not locking. - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 12-26-2012, 09:15 AM Thread Starter
Compression Ignition Addict
 
JD_MILLS's Avatar
 
Join Date: Apr 2011
Posts: 505
Thanks: 5
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
Torque converter not locking.

Got a code of p0741 and p1744 torque converter won't lock in over drive anymore. Guessing I've gotta bad converter or solenoid. But which would it be? i passed someone this morning running about 60-70mph the tc unlocked and rpms raised a good bit. (it did not down shift). then i got a wrench light come up. checked the codes and got p0741 and p1744. trans temp never raised. now the next part i'm pretty much guessing at but someone correct me if i'm wrong. shouldn't the rpm and imput shaft rpm be the same? at least while the converter is locked?


2008 f-250 LARIAT, SCT LIVEWIRE, S&B CAI, 8" MBRP STACK

Last edited by JD_MILLS; 12-26-2012 at 06:43 PM.
JD_MILLS is offline  
post #2 of 8 Old 12-26-2012, 06:45 PM Thread Starter
Compression Ignition Addict
 
JD_MILLS's Avatar
 
Join Date: Apr 2011
Posts: 505
Thanks: 5
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
anyone? really need some help to figure this one out


2008 f-250 LARIAT, SCT LIVEWIRE, S&B CAI, 8" MBRP STACK
JD_MILLS is offline  
post #3 of 8 Old 12-26-2012, 06:49 PM
Fueling M.A.D. Everywhere
 
CountryAggie's Avatar
 
Join Date: Sep 2011
Location: Rockwall, TX
Posts: 1,890
Thanks: 4
Thanked 47 Times in 29 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
I would try the solenoid first and see if it fixes it. It sounds like maybe the solenoid is bad and therefore you couldn't hold drive line pressure to keep the converter locked.
CountryAggie is offline  
post #4 of 8 Old 12-26-2012, 07:13 PM Thread Starter
Compression Ignition Addict
 
JD_MILLS's Avatar
 
Join Date: Apr 2011
Posts: 505
Thanks: 5
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
Any one ever heard of checking the tc this way? its got some pics to just cant get them to load but heres the link to it http://www.atraonline.com/gears/2007...2007_03_08.pdf

Here’s a quick method for testing the pump and converter
at the same time, using a tool you can build in 3 easy steps,
from an old TCC solenoid:
Step 1: Bend the 4 tabs back with a screwdriver (figure 4).
Step 2: Remove the solenoid parts (figure 5). It isn’t
Figure 4 necessary to remove the allen screw and spring from the tipof the solenoid.
Step 3: Secure the solenoid plunger
to the solenoid snout with a small hose
clamp (figure 6). Be sure to align the
hose clamp screw with the flat on the
solenoid snout (figure 7). If it isn’t
aligned properly, it won’t fit into the
solenoid body.Now you’re ready to put your new
tool to work on the transmission:
• Drop the pan down and replace
the TCC solenoid with the tool
(figure 8).
• Replace the pan and the
fluid.…and you’re ready to
go.
I’ve done this procedure and it
takes only 20 minutes, if that.
CAUTION: This will engage the
TCC all the time, and in all ranges. If
the torque converter and pump are operating
properly, the transmission will
kill the engine as soon as you put it in
gear. Engaging the transmission with
the TCC applied will be very hard on
the TCC lining, so keep your testing toa minimum.
If the engine stalls with the test
tool in place, the converter clutch and
lockup valve are working properly. We
already know the computer signals are
correct.


2008 f-250 LARIAT, SCT LIVEWIRE, S&B CAI, 8" MBRP STACK

Last edited by JD_MILLS; 12-26-2012 at 09:47 PM.
JD_MILLS is offline  
post #5 of 8 Old 12-27-2012, 06:24 PM Thread Starter
Compression Ignition Addict
 
JD_MILLS's Avatar
 
Join Date: Apr 2011
Posts: 505
Thanks: 5
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
tranny codes!!!

Can anyone tell me what these two codes mean i've searched for two days now and still have yet to find an answer p1744 p0741


2008 f-250 LARIAT, SCT LIVEWIRE, S&B CAI, 8" MBRP STACK
JD_MILLS is offline  
post #6 of 8 Old 12-27-2012, 07:57 PM
Fueling M.A.D. Everywhere
 
CountryAggie's Avatar
 
Join Date: Sep 2011
Location: Rockwall, TX
Posts: 1,890
Thanks: 4
Thanked 47 Times in 29 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
Quote:
Originally Posted by JD_MILLS View Post
Can anyone tell me what these two codes mean i've searched for two days now and still have yet to find an answer p1744 p0741
P1744: torque converter clutch solenoid circuit performance.

P0741: torque converter clutch performance/stuck on.


Sent from my iPhone using AutoGuide.com App
CountryAggie is offline  
post #7 of 8 Old 01-23-2013, 10:20 AM
Premium Member
 
Gearhead2012's Avatar
 
Join Date: Nov 2011
Location: Moyock, North Carolina
Posts: 1,366
Thanks: 10
Thanked 61 Times in 50 Posts
Mentioned: 1 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
Ever get it figured out...mines doing the same thing. Has been for a few months actually. I feel your pain in trying to research this, I looked a while back and couldn't find anything conclusive. Ever get it fixed?



2005 F-250 Harley Davidson Edition

Warren 205/75 Injectors
KC Turbo 71mm VGT
Twisted Diesel Level 3 Transmission/PI Converter
AFE Intercooler/Flexalite Fans/Mishimoto Radiator
Icon 4 Link, 37" Nitto's
SSBC 6 piston calipers
Yukon 4.30's, Detroit Locker


Machining the 6.0:
http://www.powerstroke.org/forum/gen...ine-6-0-a.html
Gearhead2012 is offline  
post #8 of 8 Old 01-23-2013, 11:14 AM
Compression Ignition Addict
 
K1LLsW1TchEd's Avatar
 
Join Date: Oct 2010
Location: South Jersey
Posts: 400
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
My torque converter started acting up just like this too. After a couple months of snowballing problems with my trans, I scrounged up some money for a custom trans to handle the higher horsepower tunes.


2@@8 F250 FX4 Supercab
SCT Livewire w/IDP's Tunes
S&B Cold Air Intake
Rudy's EGR Delete w/FloTech Elbow
33" Nitto Terra Grapplers
MBRP 4"Exhaust/5" Tip and Hollowed DPF
Bilstein Shocks
Kicker Hide-Away Sub
Drilled and Slotted Rotors

Rides:
2008 F250 FX4
2005 Mazda 6
2004 F150 STX
2007 Nissan Maxima SE
Coming soon: VW GTI
K1LLsW1TchEd is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome