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Preload is measured usually by prevailing torque to rotate the assembly. Pinion preload most important, 15 inch-lbs minimum for new bearings, 10-15 used, excluding drag of oil seal. .015 on diff carrier seems a bit high, but involves the force applied by the housing itself squeezing the...

Couple things. If by "zero preload" you mean no bearing preload at all, your gearset will destroy itself when under heavy loading. If you mean "zero" to mean recommended values, great. Your contact patterns are ideal, in that "drive side" is slightly inward of centered while "coast side" is...

Has a rubber diaphragm in it acted upon by vacuum. Flow is thus controlled to maintain desired PRESSURE. A diaphragm LEAK will bleed fuel into the engine, wasting it, and causing rich mixture. The diaphragm may be tested using one's HEAD: draw a stiff vacuum with mouth & tongue then maintaining...

Is it understandable? I believe very few working on vehicles are aware of the drive by wire foibles. I had to figger it out myself.

It would make sense that an injector open-circuited would be squirting NO FUEL into it's cylinder, thus "misfire (no fire)" and "low fuel". Yer runnin' on 5 cylinders!

That is exactly what mine did: "stuck closed" and "forced idle". I took the body apart, figured out how it worked, gave up on fixing it. Uses a big clock-spring to return throttle plate when off gas pedal, a very short movement spring-loaded tiny plunger to push plate slightly open when at rest...

The throttle actuator motor is self-checking. It does a maneuver every single time the key is turned to "ON", and this fact can be checked yourself to confirm it's doing it. "Rest" position for the throttle plate with key OFF is very slightly open; you can see the gap with inlet duct removed...

What led you to the throttle body, anyway? You have drive by wire, in which TB malfunction CAN and often DOES cause fail-safe (limp) mode. Any chance wiring got screwed up? You really need to buy a good code-reader.......

Most "open" differentials exhibit what is felt as a "lot of play" between the two axle shafts, if one is twisted while holding the other. This comes from clearances "adding up" between axle splines, differential gear splines, and gear tooth clearances between spider and diff gears. I've felt...

"The original Ford Cologne V6 is a series of 60° cast iron block V6 engines produced continuously by the Ford Motor Company in Cologne, Germany, since 1965. Along with the British Ford Essex V6 engine and the U.S. Buick V6 and GMC Truck V6, these were among the first mass-produced V6 engines in...

Personally, given a vehicle with NO power-saver provisions, I would wire up my own to shut down only a few selected loads, using possibly one solid-state adjustable off-delay relay; Years back I used Artisan brand, not sure if they still exist. Leave a door ajar, lights turn off until reset...

First question needing answer is did start failure FIRST OCCUR immediately after the interior got water soaked? If YES, why implicate TRS (neutral start) mounted on transmission? Or ANYTHING outside of the cab, except FUSES. A water-soaked circuit sees excess current flow, fuse blows. Sometimes...

Do the various V-8s Ford built/builds all use a SPRING-LOADED chain tensioner? I think 4.6 does. A spring makes more sense to me than a hydraulic piston starting up with no pressure behind it.

Unable to read through the entire thread, here's one thing troubling me? EVERY maker of vehicles offers a V-6 engine. How do the OTHERS solve this vibration mystery? I know V-6 of 60-degree cylinder angle is inherently ill-balanced. Do others use a balance shaft? Which ones? And do those without...

Been so long your daughter is out of college by now? Have a nice holiday with her! imp

Need to know which transmission you have, first of all. Then if luck prevails, searching "P-0708 wiring diagram 2003 (trans. type)" might come up with it. Surest way is to obtain transmission repair manual. If attempting to re-set TRS, note mounting screw holes are ELONGATED to allow...

Use of an ohmmeter can single out failed connections, if present. Also, the TRS must be aligned. If out of alignment, the neutral-start contacts will not match the detent locations of the shift lever. Possibly a bad replacement switch. Use wiring diagram to check TRS contacts. Also look for...

I think there is misinformation here. The Camshaft Synchronizers are internal to the ENGINE, telling the computer when it may inject fuel. SENSORS mounted adjacent to axles are for purpose of detecting wheel speed differences.

I purchased a reman automatic transmission from Ford. It functioned properly, cost a bit more, but warranty exceeded all others. Engine not sure of. Have always heard good things about Jasper reman engines, though.

OK, one bent valve if cranking still possible, one cylinder is dead. Maybe fixable, maybe not, depending on internal findings. The best alternative IMO is, if keeping the vehicle a long time is expected, is installation of a remanufactured engine, from a reputable source. No used engine.

You were informed.......I wonder what they meant by that? Rods and valves are bad is utter gibberish without further explanations. "Rods": rod BEARINGS?? tie rods?? I once heard of a guy who "threw a tie rod"! Valves are bad. ALL of them? Accepting this diagnosis is like blindly accepting...

PCM programming has a provision for preventing damage to the electronic clutch (on 4X4s) which prevents 4X4 AUTO engagement if speed difference between front and rear axles is excessive. This is likely what you experienced. Rare, scary, keep driving, if memory bugs you, try mildly spinning...

Japanese 4-bolt...........

The choice of sons in law was unfortunately made by female minds, rather than your own! I am 78, no kids, no relatives (save for wife), 20,000+ pounds of tools & machinery (lathe, milling machine, etc.), and wish I could give it all to someone young and worthy.

" I could see how less fuel height in the tank would reduce the pressure at the suction to the pump somewhat and make the pump work harder, but not sure how big an affect the fuel height would have on that pressure" This is a sort of engineering consideration based on "head" of a contained...

This is most important, to assure bearing preload is not altered by disassembly. If ANY part other than seal or oil slinger is replaced, preload must be addressed to assure longevity; re-tightening to previous location will not cut it.

That's what I've been wondering.........

We used to call that "dog-tracking". Often caused by a bent frame. Seems unlikely to cause the issue shown in this thread.

Look closely at this adaptor: The cavity between the transmission and transfer case has a WEEP HOLE placed in it at the factory. This is how my '04 is made. No gasket, unless dust is a consideration, you can include one if you like (I siliconed it). Any leakage HAS to be seal leakage, either...

The electrical connection between the cable and a fastening lug attached to it is a critical part of success. This type is very effective: Best attached by "tinning" the cable end with solder, then hammering lug tab down into the inserted cable end, then finish soldering the joint solid...

Not sure about Sport Trac; my '04 XLS has an oil seal on transmission output shaft, oil seal on transfer case input shaft, and it appears that a leak between the two MUST mean a leaking oil seal, gasket or no gasket.

A piece of arc welding cable with many very fine conductors works well for grounding strap and replacement battery cables. Only "kicker" is need for good, solid lugs on the ends. This cable is super flexible, insulated (usually) with oil-resistant material.

Thanks, but it really isn't intelligence, but rather years and years of working the early-learned theory into everyday work. The fact that the theory "works" often mystified me: television, for example, when I had a course in it, I swore it couldn't possibly work!

Starter "did nothing" during test and you put it back in the vehicle? Why? Fail to understand. Anyhow, if 5-speed MANUAL, push-start is always a life-saver.

I will have to defer to your greater knowledge of this material, for I don't know Jack **** about it! But don't hesitate to clue us in more!

SHIFT solenoid A would place transmission in or out of first gear. Pressure Solenoid A is another thing altogether, controlling operating fluid pressure. I prefer shift 1, 2, or 3 and pressure sol. 1 or 2.

To me, it would be ridiculous to use differing parts which do exactly the same thing on different products or models. But, ya never know. Used to be you could count on all of Ford's bigger cars having 9-inch rear axles. Today, idea still good with 8.8 across the board, but Shraders??

Ahhh,,,, selling yourself short knowing ya know more than 90% of us!

One is said to be born with a certain IQ which never changes. I believe that's bullshit.

I also started in high school with Electric Theory, freshman year.Old guy taught it, knew his stuff, but back then I did not understand the deeper principles. High school was miserable, and I failed to graduate with my class, not enough credits, so went an extra semester. Took Psychology 101...