If your 4WD switch looks like this AUTO, 4HI, 4LO then...

[Explorer_5.0]

DogFriend, thanks for the info!

 

[Gage]

Just wanted to book mark this so I can read the hole thing later.

 

[alfcapone]

The Q about disabeling over 35mph, is't not so that it's when your in 4wd high/low it gets disabled TO 4wd auto not disabled to 2wd, you'will always have 4wd auto?
If i floor it my 4wd light shines brightly whatever speed i have.

 

[X24]

 

[alfcapone]

Hm.. ok... don't really se the point having that image in this thread, but nice!

 

[X24]

The point was that you may want to reword your previous post. It makes absolutely no sense to me. I'm not sure what anybody else thinks.

 

[alfcapone]

I know everyone says this and the book does to somewhere, but i kinda beg to differ. I have a switch that lights up when power is sent to the front end in Auto4WD and you can actually see when your front end is engaged, and i have caught mine on when i drive really hard on my 3-4 shift which would be over 45-50+ mph. I'm not trying to start an argument, if you don't believe me come to Louisivlle and i'll give you a ride, but my Auto kicks in over 35 mph

Yomie - I have yet to see anything official from Ford stating that the Control Trac gets disabled above 35 MPH (and that includes a lot of official Ford crap). What I have seen are many posts from people stating that it is disconnected above 35 MPH. I have a feeling that most of the people making the claims are just repeating what they have already read. I don't make it a regular habit of going WOT on slippery surfaces since things can get out of hand pretty quickly above 35 MPH at WOT on slippery surfaces. Until I've read something officially from Ford, I'll continue to believe that mine operates at speeds above 35 MPH.

Have you read it, do you get it now?

My "X" fishtaild in about 55mph a while ago, and the frontend kicked in almost instantly and straitend it up for me, so i know that it engages frontend over 35mph.

 

[taxx]

I think we have established auto kicks in above 35 mph

 

[Robert]

Originally posted by 98FordX24
The point was that you may want to reword your previous post. It makes absolutely no sense to me. I'm not sure what anybody else thinks.

Take a look at where alfcapone is from and you might want to re-think your statement. Not everyone can speak English as well as those of us in the United States, especially when they are living 9000 miles away and learn it as a second or third language. I've been to Sweden and found that almost everyone I came in contact with spoke English well enough to converse with me. If I was from another country coming to the U.S. I doubt if my findings would be quite the same for my native language.

 

[X24]

I'm sorry if I came off sounding mean. It wasnt intended to sound that way (hence the ).

Regardless if he's from another country, this...

The Q about disabeling over 35mph, is't not so that it's when your in 4wd high/low it gets disabled TO 4wd auto not disabled to 2wd, you'will always have 4wd auto?

still makes no sense to me. If you can make sense out of it and tell me what he is trying to say, that would be great.

 

[tenikiwon]

Watching the light when 4WD engauges

Yesturday when trying to troubleshoot my clunking 4WD problem I got my truck up in a snowbank and on ice so I wouldn't move and just spin the tires. Under normal acceloration the Auto kicked in smoothly and quietly (that's a first) when I put it in 4WD or 4LO the light came on brighter (showing it's fully engauged). While spinning I noticed that it lights up even brighter in both 4Wd and 4LO? hrmmm.. I though once it was in either that was it and the __________(whatever) that engauges the Auto doesn't matter anymore.


Along with that, the clunk seems to come from somewhere between the t-case and the front diffy. (Could be either) where should I turn to next?

 

[X24]

Re: Watching the light when 4WD engauges

Originally posted by tenikiwon
...hrmmm.. I though once it was in either that was it and the __________(whatever) that engauges the Auto doesn't matter anymore.

If I'm understanding that right, I think what goes in the blank is "transfercase clutch". It's my understanding that, even in 4wd mode, the clutch will throw power around to different wheels as it is needed. I could be wrong.

 

[TPLYNCH]

ALF - I think the confusion about the auto 4WD is this - Those people were using the phrase "disengages" above 35MPH. Disengages is wrong. What happens is the system applies 35% of power to the front on takeoff, and decreases in 5% increments until it reaches 35MPH at which time no power is sent to the front wheels. At that point your Ex is Rear Wheel Drive UNTIL the computer detects speed differences between the front and rear (rear wheels slipping/spinning) at which time the system applies power to the front wheels in 5% increments until the speed difference is negated. Then the system reduces power to the front and the process starts all over again.

The only way to truly "Disengage" the Auto 4x4 is via the modification discussed in this thread or by pulling the fuses for 4x4.

 

[Nate1]

or by pulling the fuses for 4x4

I'll just stick with splicing wires thanks

 

[alfcapone]

Well 98ford,
What can i say, When i read some of the post in this thred, my interpretation was that some people thought that 4wd was disengaged over 35mph, and wont come on again untill you go below 35mph. And i think that it workes like this, if you are in the 4wd high or low mode (on the switch) and you reach over 35mph, it will disengage the 4wd high or low, but it will go into the 4wd auto. Read: you will always have 4wd if you need it even over 35mph. Clear enough?

or shuld it be:
The Q about disabeling (4wd)over 35mph, does'nt it work like this, when your in 4wd high/low, it gets disabled TO 4wd auto(over 35mph). Not disabled to 2wd, you'will always have 4wd auto?

if i think a while i might come up with some more variations, but whats the use, i missed some "," and maybe a "." here and there, but if you have read the other post on this thread, about 4wd disengaging or not, and made som effort i really think you should have understood it the second time you read it, atleast, others did.

I have no problems with being corrected for my English, its just educational, but there is a big problem to describe or explain in writing,(1:st, 2:nd,3:rd language whatever) because there can be interpretation faults, as in this text, but when it getting plain silly..."bye gone"

Sorry! long text with nothing to do with the thread, but i just had to...no hard feelings

Ha det så kul, gnäll på denna mening om ni kan.

 

[X24]

Originally posted by Rick
Language is a tool for communication. If you don't use the tool properly you cannot communicate effectively.

I understand that English is not your native language, but a few missing punctuation marks can make a big difference. I did not post to make you angry or make you feel like you don’t know how to type (you do very well for someone that is writing in a 2nd or 3rd language), I was simply stating that I did not understand what you wrote and that you might want to think about rewording it.

I hope we can put this past us.

Chris.

 

[alfcapone]

Yepp! Bye gone....

 

[dogfriend]

Alfcapone - Your question is an interesting one, if I understand it correctly. I think you are asking if you are in 4wd High and you go over 35 mph, will the 4wd High actually become 4wd Auto?

Possibly, but I haven't found anything in the Ford service manual or in the Borg Warner patent (US Patent #5,485894 http://patft.uspto.gov ) that would indicate that this is true.

The 97 owners manual has this description:

4wd Auto - Full power delivered to the front and rear axles for increased traction. Use this mode for normal on-road operating conditions such as dry road surfaces, wet pavement, snow and gravel.

4wd High - 4WD with full power delivered to the rear axle and higher continuous power level to the front axle than 4WD AUTO (emphasis added by me) Use this mode for severe winter or off-road conditions such as deep snow, ice, shallow sand.

4wd Low - Full power to both axles, including a lower gear ratio for low speed. Use this mode for off-road applications that require extra power such as deep sand, steep grades and pulling a boat out of the water. 4wd Low is not recommended on dry pavement.

So, to try to answer your question, its possible that it reverts (returns ) from 4wd High to 4wd Auto above 35mph, but Ford doesn't say so. In fact, Ford is pretty vague on the actual difference between 4wd Auto and 4wd High except to say that 4wd High has "a higher continuous power level". I think this means that the current sent to the clutch is higher all of the time in 4wd High.

The transfer case cannot revert from 4wd Low to 4wd Auto above 35mph because this would require the transfer case to shift from low to high, and that can only happen when the truck is moving slower than 5mph according to the Ford service manual. I have never tried to go 35mph in 4wd Low - please tell me what happens if you do

I don't see anything in the patent or the Ford manual that says that 4wd is disabled or otherwise modified at speeds above 35 mph.

There is a section in the patent where they list the amount of overrun by the front driveshaft before the transfer case clutch current is increased. This is variable up to 64 km/hr (39.7mph) but does not affect the amount of current sent to the clutch, but only affects how much wheelslip is allowed before the current is increased to compensate.


BTW - Your English is much better than my Swedish

 

[alfcapone]

when i think about it, i have to stand still in neutral to engage 4wd high or low, and it engages with a big "clunk". How the h..can it disengage over 35mph, when you have to stand still to operate it normaly, and nothing happens when you turn the switch while driving even at low speeds?

 

[GJarrett]

It engages with a big clunk in 4 high? Mine does not. The big clunk is the transfer case engaging into Low. The clunk is the sound of the gears dropping into Low. When High engages it is only by activating a magnetic clutch and it should not make a sound.

You have to stop to engage Low in order to allow it to change the gearing. The gearing stays the same in High, and you should be able to switch from Auto to High while moving. I have done it many times.