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I fail to buy any of these contentions; an alternator is an alternator, generator of DC power to re-charge battery upon starting and then provide all power used by the vehicle. Have FUSE-LINKS been checked?

Understanding the reasoning pre-empts your contentious replies. The additional cooler for transmission fluid outside of the radiator keeps temperature increase related to long term engine idling and high outside temperatures from getting the trans fluid even hotter under such conditions, as well...

Operation of the drive by wire throttle body is a good deal more involved than meets the eye. First, when the key is turned to "ON", the throttle plate is driven open just slightly, very quickly, before the key is turned to "START, against an internal stop, and the PCM checks Throttle Position...

Drive By Wire Throttle Body. Application unknown. The blue-encircled little black knob is the screw against which the clock-spring end within the throttle mechanism rests.

The shift interlock mechanism is a very flimsy design, and after repairing it to working status several times, I used 3-M Trim Cement to permanently glue the mechanism in the released position. Doing this allows shifting out of Park at any time, removing the anti-theft feature of locked in...

In this day and age, the old-time failures are often overlooked. I would look for a burnt exhaust valve. This can be checked by holding a folding matchbook open against the end of the exhaust pipe. If the matchbook flaps back and forth with exhaust gas pulses, pulled against the pipe by suction...

All 2004s used the 5R55S transmission. No other will interchange.

An alternator itself can draw current from the battery when everything is shut off, due to faulty diode(s), even though they still allow current to flow to the system with engine running. Rare situation, though. I would substitute another known good alternator and see what happens.

Remove the top cover of the transmission and INSPECT the guts. It sounds as though internal parts are broken; if so, that should be visible. The transmission may be repairable.

The W and S were basically similar physically, and can interchange, EXCEPT second gear ratio was not the same in each, all other gears the same. Therefore use of the "wrong" one would result in confusing the PCM regard shift speeds in 2nd gear.

What is a "carrier break"? The gear ratio in front differential must MATCH that of the rear, so, no, "any 3.54 and higher may not be used".

Tightening a bit beyond hand-tight using a filter wrench has never caused me any problems (or leaks). BUT, not much more than 1/4 turn. Loosening to replace filter later will be a bit more difficult. Lubricating new filter's rubber seal is important; use of vaseline is a good choice.

It appears the coolant is coming from above the sensor shown, then running down it, hence all the rust.

Drilling deeper in any water pump assembly brings with it the chance of breaking through into the water jacket. If this happens, the bolt involved must be adequately sealed against coolant leakage, noting the coolant is under pressure.

a 1/2-inch hole drilled 1-inch deep into the lug (deeper if necessary) then a long, sturdy cold chisel and BFH will easily break off the thin shell left.

Yes, 200 lb-ft would be high in most cases, though I've seen other differentials go 150+ lb-ft with new clutch plates and springs. 50 is Ford's usual acceptability number when new.

By locked in positrack, you mean one wheel cannot be made to slip by attempting to rotate it while up off the ground with the weight of the car on the other wheel? It may take 200+ ft-lbs to rotate it. If it absolutely is locked to the other wheel, the only way I can see that happening is the...

Ford wanted $600+ for new. I bought used on Ebay.

I have lived all over the U.S., am 79 years old, now living with my wife in Western Arizona near the Colorado River. We drive a 2004 Explorer 4.0L 4X4 with 180,000 miles on it. My kolacky!

Beyond nearly everyones' ability.

When mine went out (2004) I bought a used one. Must have exactly same part number. Will work properly, but display ABS Light continuously, wanting VIN downloaded.

Na zdar! My mother was born in Praha, my grandfather in Domazlice. My father is also Czech, but born in U.S., like me. Beautiful Explorer!

Here's what I remember, and it ain't much. My 4r55e quit shifting, but no slipping. Took it apart. Several thrust bearings were broken, one a needle bearing, allowing parts to lose location on their shafts. This mis-aligned the holes through which fluid must pass to engage clutches. So, end-play...

What does "larger bearings" mean? I maintain that first, bearing SHELLS are only HALF the bearing; the crankshaft journal is the other half. So, if you pick up a "3-under" bearing shell, it's INSIDE DIAMETER will be 0.003" SMALLER than a STANDARD SIZE shell's, but the OVERALL DIAMETER of the two...

I am missing or misunderstanding something here. Help, please. A CRANKSHAFT'S "throw" diameter determines it's BEARING SIZE, NO? Making the crank throw SMALLER necessitates a smaller bearing shell INSIDE DIAMETER, NO? So, yes, the outside diameter is larger, but when do we ever measure...

Grinding the journal reduces it's diameter, thereby necessitating SMALLER bearings.

Attach a pressure gauge and observe transmission fluid pressure with engine idling. If low or non existent the oil pump,may have been damaged when the transmission was installed. Check for trouble codes.

The double cardan joints used for many years on luxury cars, cadillacs and lincolns, definitely did not allow as much angularity as a rzeppa cv, or even a single cardan joint. Their purpose was to eliminate vibration. Rzeppas don't just wear out prematurely. Like any such device, remaining...

Here is how the real Rzeppa design works. Not found today, to my knowledge except via specialty or aftermarket. You might want to look into first-year Oldsmobile Toronado which used big ones, which rarely failed, cannot say anything about maximum angle, however. The first Ford Fiestas, 1978-1981...

Well said!

Here's the type on my 2004 Explorer. Metal stem with outside nut,O-ring seals it.

Um, don't the servos squeeze the bands around the clutch drums to keep them from rotating? The clutches are engaged by controlled hydraulic pressure, no? Unless automatics have been redesigned........

Two bearings separated by a spacer which controls bearing preload, held together by a big nut. This would be for 99% of the differential section pinions. Ford 9-inch pinion uses THREE bearings:

If a two-wheel drive, good idea! If 4X4 bad idea. 235/60R16 tire is slightly smaller than the stock 235/70R16. Mixing those sizes on a 4X4 will result in 4X4 AUTO trying to "kick-in" 4-wheel drive all the time, with disastrous results. 4X4s require ALL 4 tires be the same rolling diameter.

My 2004 came with a full-size spare, but it had no TPMS sensor. I wanted to use 5-tire rotation, so bought a sensor, mounted it in the wheel having none, programmed the new sensor using a magnet resembling that of a microwave oven magnetron. All 5 wheels now reflect whether air pressure is...

5R55S has NO DIPSTICK or fill tube, if you do not know that. Therefore, transmission is vented otherwise to the atmosphere. A replacement rebuilt usually comes with NO VENT TUBE. The old tube must be removed from the old transmission and placed in the new transmission. Without the vent tube in...

Bad connection between battery cable(s) and battery post. Bad ground connection grounded end of battery negative cable.

I had a whine-like noise which I was certain came from the gears. Drove it thousands of miles, finally the noise becoming scary enough to look into it. With all four wheels off the ground (4X4), running at idle in drive (4X4 HIGH), my stethoscope, a big long screwdriver, indicated most intense...

To go to the trouble of installing a junk-yard engine whose operating condition is unknown (especially one prone to timing chain failure) is akin to madness. I would contact the seller and negotiate a return of either my money or another engine which can be run for inspection.

Those plugs are almost universally 1/2-inch NPT (National Pipe Thread) size tapered thread pipe plugs. As such, they may be used over many times; the tapered thread effects a seal, and sealant is often used anyway. Teflon pipe thread is good. Your plugs are this type: The type having...