4r TCC partial lockup malfunction? - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 01-01-2015, 07:49 PM Thread Starter
Newbie
 
Join Date: Aug 2014
Location: Tampa
Posts: 3
Smile 4r TCC partial lockup malfunction?

Running a 4r with baumann controller.

I use a floor switch to manually lock converter and have an LED light to indicate when the converter is locked.

Lately, I have noticed, when unlocked, I have a small amount of light on the LED intermittently (not fully lit as is typical with lockup). This leads me to believe the TCC is receiving some sort of uncommanded ground signal or there is something wrong with the TCC solenoid or the Baumann controller. I have eliminated my switch as a potential culprit.

The real problem here is I have experienced stalling when going from P to R or D. This problem is intermittent but annoying. I have to give it about 1500rom to keep it from stalling.

Thoughts?

Thanks,
Mike
chuzie is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 01-01-2015, 07:58 PM
Seasoned PostWhore
 
theterminator93's Avatar
 
Join Date: Jan 2009
Location: North Ridgeville, Ohio
Age: 31
Posts: 9,043
Garage
It's hydraulically impossible to lock the converter in 1st gear on the 4R70W, so I doubt it's the cause of your stall when shifting out of park.

The TCC solenoid is PWM controlled IIRC, at least on the Ford PCMs. Do you have a way to check the duty cycle for that circuit?

-Brandon
97 Laser Red Thunderbird LX 162k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
98 Black Mark VIII 160k, stock daily driver
07 Redfire Fusion V6 SEL 178k, for the wife
Gone but not forgotten: 96 Mark VIII, 94 Cougar XR7, 93 Mark VIII

TCCoA's resident pilot since 2014
Once you have tasted flight, you will walk the world with your eyes turned skyward, for there you have been and there you long to return. -Leonardo da Vinci
theterminator93 is offline  
post #3 of 5 (permalink) Old 01-01-2015, 11:57 PM
Moderator & Teksid Whore
Super Moderator
 
guitar maestro's Avatar
 
Join Date: Jul 2002
Location: Laredo, Texas
Age: 39
Posts: 11,961
Send a message via MSN to guitar maestro Send a message via Yahoo to guitar maestro
that kind of stalling usually stems from a large vacuum leak that is letting in so much unmetered air that the engine stalls before the PCM has any time to adapt the fueling and record corrections.
guitar maestro is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 01-02-2015, 12:19 AM Thread Starter
Newbie
 
Join Date: Aug 2014
Location: Tampa
Posts: 3
Actually I am working a vac issue too. Just thought the strange lockup indication was too much of a coincidence. Let me button up this vac issue and I will report back if it doesn't work.

Thx.
chuzie is offline  
post #5 of 5 (permalink) Old 01-02-2015, 11:13 AM
No, Mr. Lemmywinks, No!!!

Moderator
 
Grog6's Avatar
 
Join Date: Jun 2005
Location: Harriman, TN
Age: 56
Posts: 10,043
Garage
You might need to change the fluid or wash down the wiring; an LED doesn't need a lot of current to be visible, less than 1 milli-amp, so you could get leakage in the wiring somewhere.

Salt in the external wiring could do this; the solenoid needs a bunch of current to work, so a dim light is unlikely to be enough to move it.


I can confirm the 1st gear/no-TCC interlock; My black Cougar has been having problems disengaging, and I finally figured out my TCC solenoid is stuck closed, lol.

It's drivable, but rough.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


"War Is Peace. Freedom Is Slavery. Ignorance Is Strength." - George Orwell.
Truth Isn't Truth. - Rudy Giuliani, 2018 Award winner, “Most Outrageous Diversion” by MSNBC for this quote
Grog6 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums 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











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

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