Torque Converter Won't lock - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

 
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post #1 of 10 (permalink) Old 02-23-2010, 12:23 PM Thread Starter
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No Torque Converter lock-up

I've had my 1999 for about six years. It has a monsterbox tranny with a BD torqloc that has been fine until the other day. Suddenly, the torque convertor won't lock up. I removed the torqloc and reconnected the wires that control the convertor lock up and still nothing. The PCM must be throwing a code cause now the OD light is blinking. Any ideas? Everything else works fine and shifts fine.

99 F250 Superduty Extended Cab 4x4 7.3, 6" lift, Dieselsite 6-pos chip, Autometer Gauges, Banks Six gun, ATS Stage 2 4R100 trans, 4" exhaust with twin 5" stacks, AFE Stage 2 intake, Banks Intercooler, Hypermax H2E Turbo, 203 Thermostat, FASS 85/150 Fuel System, Snow water/meth Injection, Fluiddamper, ZEX Nitrous, Evans Waterless cooling, B&D Torque Loc, Decelerator exhaust brake
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post #2 of 10 (permalink) Old 02-23-2010, 10:44 PM
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Will your exhaust brake lock the torque converter?

Wayne B

2000 F-250 Super Duty 4x4, Auto, Super Cab, Long Bed.

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My other vehicle:
Piaggio MP3 500
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post #3 of 10 (permalink) Old 02-23-2010, 10:58 PM Thread Starter
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My exhaust brake is not connected to the Torqloc. I'm going to pull the codes and check the converter by manually grounding the lockup wire and see where I am.

99 F250 Superduty Extended Cab 4x4 7.3, 6" lift, Dieselsite 6-pos chip, Autometer Gauges, Banks Six gun, ATS Stage 2 4R100 trans, 4" exhaust with twin 5" stacks, AFE Stage 2 intake, Banks Intercooler, Hypermax H2E Turbo, 203 Thermostat, FASS 85/150 Fuel System, Snow water/meth Injection, Fluiddamper, ZEX Nitrous, Evans Waterless cooling, B&D Torque Loc, Decelerator exhaust brake
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post #4 of 10 (permalink) Old 02-24-2010, 06:13 PM Thread Starter
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Solved

My 3rd brake light was out!!!! Everything works fine now thanks to an older post I found.

99 F250 Superduty Extended Cab 4x4 7.3, 6" lift, Dieselsite 6-pos chip, Autometer Gauges, Banks Six gun, ATS Stage 2 4R100 trans, 4" exhaust with twin 5" stacks, AFE Stage 2 intake, Banks Intercooler, Hypermax H2E Turbo, 203 Thermostat, FASS 85/150 Fuel System, Snow water/meth Injection, Fluiddamper, ZEX Nitrous, Evans Waterless cooling, B&D Torque Loc, Decelerator exhaust brake
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post #5 of 10 (permalink) Old 02-26-2010, 09:00 PM Thread Starter
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Torque Converter Won't lock

My 99 F250 4R100 4x4 torque converter suddenly is failing to lock. I checked the brakes light bulbs, all are okay. I pulled two codes off the truck, P0743 Torque Converter Clutch soleniod circuit electrical and P0741, Torque Converter Clutch solenoid circuit performance or stuck off. Also, no engagement when I ground out the TCC wire. Any suggestions before I open the bottom up? It's looking like the TCC solenoid to me.

99 F250 Superduty Extended Cab 4x4 7.3, 6" lift, Dieselsite 6-pos chip, Autometer Gauges, Banks Six gun, ATS Stage 2 4R100 trans, 4" exhaust with twin 5" stacks, AFE Stage 2 intake, Banks Intercooler, Hypermax H2E Turbo, 203 Thermostat, FASS 85/150 Fuel System, Snow water/meth Injection, Fluiddamper, ZEX Nitrous, Evans Waterless cooling, B&D Torque Loc, Decelerator exhaust brake
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post #6 of 10 (permalink) Old 02-28-2010, 09:03 PM
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It's either the solenoid or the wiring to the solenoid. Those codes don't isolate the problem to either one, you'll need to do some electrical continuity testing to know what to replace.

Mark
Former Automatic Transmission Engineer 1988-2007

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #7 of 10 (permalink) Old 03-03-2010, 02:25 PM Thread Starter
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Thanks Mark.

99 F250 Superduty Extended Cab 4x4 7.3, 6" lift, Dieselsite 6-pos chip, Autometer Gauges, Banks Six gun, ATS Stage 2 4R100 trans, 4" exhaust with twin 5" stacks, AFE Stage 2 intake, Banks Intercooler, Hypermax H2E Turbo, 203 Thermostat, FASS 85/150 Fuel System, Snow water/meth Injection, Fluiddamper, ZEX Nitrous, Evans Waterless cooling, B&D Torque Loc, Decelerator exhaust brake
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post #8 of 10 (permalink) Old 03-03-2010, 02:26 PM Thread Starter
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Not Solved

While the third brake light was out, I still have no lock up. No lock up when ground out TCC control wire. I pulled two codes off the truck, P0743 Torque Converter Clutch soleniod circuit electrical and P0741, Torque Converter Clutch solenoid circuit performance or stuck off.

99 F250 Superduty Extended Cab 4x4 7.3, 6" lift, Dieselsite 6-pos chip, Autometer Gauges, Banks Six gun, ATS Stage 2 4R100 trans, 4" exhaust with twin 5" stacks, AFE Stage 2 intake, Banks Intercooler, Hypermax H2E Turbo, 203 Thermostat, FASS 85/150 Fuel System, Snow water/meth Injection, Fluiddamper, ZEX Nitrous, Evans Waterless cooling, B&D Torque Loc, Decelerator exhaust brake
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post #9 of 10 (permalink) Old 03-03-2010, 03:12 PM
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Quote:
Originally Posted by bigdogal View Post
I pulled two codes off the truck, P0743 Torque Converter Clutch soleniod circuit electrical and P0741, Torque Converter Clutch solenoid circuit performance or stuck off.
Quote:
Originally Posted by Mark Kovalsky View Post
It's either the solenoid or the wiring to the solenoid. Those codes don't isolate the problem to either one, you'll need to do some electrical continuity testing to know what to replace.
That still applies.

Mark
Former Automatic Transmission Engineer 1988-2007

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #10 of 10 (permalink) Old 06-01-2011, 07:23 PM
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Did you ever figure out the problem? I have an 2002 expedition with the 5.4..shift great just wont go into lockup..any ideas? lockup solenoid on a 4r100 is located on the whole solenoid block..rebuilt @100 on ebay..ford wholesale@295..have checked wires..no burnt or bad places in it..no idea which wire to check for solenoid power

Quote:
Originally Posted by bigdogal View Post
While the third brake light was out, I still have no lock up. No lock up when ground out TCC control wire. I pulled two codes off the truck, P0743 Torque Converter Clutch soleniod circuit electrical and P0741, Torque Converter Clutch solenoid circuit performance or stuck off.
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