wptski

Sorry, Ford Shop Manuals only show a Aisin AW21, FNR5 or 6F35 going back all the way.

Okay. In Post #134 you state that it happens before you reach a constant speed, correct? If so, the TCC wouldn't be locking up or shouldn't then.

Okay, I see that now. I actually replied to that post where they disconnected the plug at the rear end, the hard way to do it. There is a so-called "hoot" sound first heard from the rear of the '09 4WD Escape, TSB to reprogram didn't help. later said to be in 4WD, FWD, I4 and V6 from drive chain in transaxle. The replaced chain only works for a short and the noise returns. Owner's are being told it's normal now. Pulling the fuse for the 4WD module stops the sound. Go figure...

At last, an answer. Thanks.

What??? Is that a typo??? Is supposed to engaged/disengaged when the system detects the need or lack of. They do wind tunnel test and add things for less than a 1mpg gain. Look at the front edge of the rear wheel well on a >09' Escape some time. The little rubber piece was added for very little mpg gain but it was added never the less.

That doesn't answer the question, did you try that? It would prove/disprove the engage/TCC claim.

Okay, I just reread a bit of this thread. I do remember it now. Bet nobody has tried the simple test of pulling the fuse on the 4WD/AWD module to see if the problem persists?

If this thread description is accurate or 1500rpm@40mph which sounds like a constant speed has been reached. By that time the rearend has disengaged. It happens well below that speed.

Not for TC but if there was a simple way to disable the AWD, it would.

Huh! That will defeat your 4WD/AWD rearend ATC unit. If that stops your problem, you need a new rearend, they aren't servicable.

That's the hard way! Just pull the fuse to disable the 4WD/AWD module.

You heard wrong. Your AWD/4WD kicks in every time you leave from a dead stop no matter what the driving conditions are.

Ford's plans are to start building those rearends in house instead of purchasing them from Dana. They will be building them at Ford's Sterling Heights, MI Gear and Axle Plant. That project has been going on for some time but I have no idea when the launch date is.

Nothing at all. It was your Tag Team partner that was trying to explain a open differtential working with TC and I incorrectly stated that it pulsed the brakes which it doesn't. Actually Ford thinks AWD means a 4WD with TC.

It says what I stated. If your trying to make the point that I said "pulsing the brakes" instead of "pulsing the brake pressure"? I did and that was incorrect.

Why don't you read this Wikipedia page on ABS systems and you can always challenge the author:My link. It states that a ABS system can release/apply braking pressure up to 16 times per second.

Apparently you've never felt the ABS system kick in while applying the brakes! The following from '07 Fusion Workshop Manual. Anti-Lock Control The anti-lock brake system (ABS) module receives wheel speed readings from each wheel speed sensor and processes this information to determine if an ABS event is necessary. The wheel speed sensor electrically senses each tooth of the wheel speed sensor indicators as it passes through the wheel speed sensor magnetic field. The active wheel speed sensor generates a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry to determine if they are functional. The ABS module continuously monitors and compares the rotational speed of each wheel and when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper. This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS module returns the solenoid valves to their normal position, and normal (base) braking resumes. The HCU has additional internal solenoid valves incorporated to enable control modulation of the wheel brake pressures. The ABS module is self-monitoring. When the ignition switch is turned to the RUN position, the ABS module does a preliminary electrical check, and at above 20 km/h (12 mph) the pump motor is turned ON for approximately 1/2 second. Also, during all phases of operation the ABS module, with the vehicle in motion, checks for correct operation of the wheel speed sensors. Any malfunction of the ABS causees the ABS to shut off. Normal power assisted braking, however, remains. Traction Control System — All Wheel Drive (AWD) The ABS module communicates with the powertrain control module (PCM) to assist with traction control. When the drive wheels lose traction and begin to spin, with vehicle speed under 100 km/h (62 mph), the ABS module requests the PCM to reduce engine torque while simultaneously applying and releasing the appropriate brake caliper(s) to maintain traction. The PCM accomplishes this by minor incremental timing changes and fewer fuel injector pulses until the ABS module ends the request. The request ends when the driven wheel speed returns to the desired speed. After the vehicle speed exceeds 100 km/h (62 mph), the traction control is accomplished only through the PCM torque control. The traction control system can be disabled by pressing the traction control switch and is indicated by the traction control light in the instrument cluster. The traction control system resets and returns to normal operation when the ignition switch is cycled, or when the traction control switch is pressed and released a second time during the same ignition cycle.

Facts? Nobody has provided any documents, just what's stated in Ford's PR releases or what you think, nothing factual. Your arguing, I'm discussing. Facts are like the YouTube video, although no Ford products but vehicles with AWD/4WD couldn't provide enough rear wheel torque to climb a incline with the front wheels slipping. Considering the way a Fusion/Escape works, it seems that it would though.

If you resort to name calling, you must be uneducated and/or weren't brought up very well.

They are when it comes to the ABS function which TC uses to pulse the brakes on a single or multiple wheels. Pulsing gives more control, it's like the PWM used on the ATC or DRL.

What page? Okay, I looked at the '07 Fusion owner's manual. You wouldn't know if it was overheated or had a blown fuse. The "wrench" icon for mine is listed as Throttle Control/Power Train. If you pull the fuse, it will light up. No indicator for a over temperature, so no need for instructions on how to deal with it but since there isn't a temperature sensor anyway, who needs a indicator?

This system is supposed to anticipate wheel spin before it happens! I gues the car does know if the pavement is dry or not. Hey guys, I'm still waiting for the pages in your Fusion owner's manual about dash warning of high temperature of the ATC unit.

I do understand how a open differetial works with TC. TC doesn't apply the brake to the spinning wheel , it pulses the brake, you'd lose control of the vehicle if it applied the brake fully. The Ford Escape Hybrid didn't have TC before 2009, so what do you call them?

What graphic are you looking at? The first post in that thread is just a picture of what it looked like but not the actual selectable one. The link to the actual selectable graphic has been broken since last year some time, unless you have a working link, I'd be happy to look at and admit if I'm wrong about what it showed. At a constant speed on dry pavement, it wouldn't send any torque to the rear. The references to "wheel(s)" is in the graphic and also the description of AWD at the Ford's Mecrury site. Just look at the top of the graphic, does it say TC?? You don't have a transfer case, therefore you don't have a differential between the front and rear. Without a differential, you can't shift torque from the front to rear as one would with Full-Time Four Wheel Drive. I will admit that it's some design to eliminate the transfer case, drive off a PTU to the rearend using a PWM operated clutch without tearing the PTU during operation.

It seems that you guys have a reading disorder of sorts. I have posted above and it was also used the graphic that Ford killed where they said they said torque is directed to the "wheel(s)" that have the most traction. That implies that torque is shifted from side to side which the system is not able to do. A open differetial sends the torque to the wheel that has the "least" traction. Actually there isn't a differential between the front and back so it can't shift torque that way either. It can supposedly increase rear wheel torque when needed.