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4x4 NOT Working!!! Need help Fast!!

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Old Nov 24, 2003 | 07:06 PM
  #1  
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Exclamation 4x4 NOT Working!!! Need help Fast!!

HI guys, I bought a 1991 Bronco last week. This truck is equipped with the Automatic hubs, and Electronic shift transfer case.
My problem is the 4x4 will NOT turn on.

When I push the 4x4 button I hear 2 clicks then another one 4-5 seconds later. I know it's drawing power because the voltage gauge drops as soon as I hit the 4x4 button.

Besides the clicking NOTHING else happens.

I just bought a used Transfer-case motor from a junkyard for $55. I replaced it thinking that was the problem and it is still NOT working. And of course I checked the Fuses.

I'm at a Dead End now guys. I don;t know what to do. Anyone's help would be greatly appreciated!!
 
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Old Nov 24, 2003 | 07:27 PM
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Easy way to see the it is the trasfer case is have somone look under it with it in 4wheel drive and see if the front shaft is spinning. Most likely it is the auto hubs. THey Suck! get th kit and put in some warn manual hubs! WAY STRONGER and more reliable.
 
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Old Nov 24, 2003 | 07:47 PM
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As dblue351 advised, the first step is to check and see if the transfer case is engaging. If is IS, then the trouble is probably in your hubs.

Most here will tell you to swap them for manuals, but often they are just packed with too much grease. Ford says to lightly coat CERTAIN parts of the hub locks with light grease, and then soak the assembly in transmission fluid before inserting it into the hub. You might want to take a look at them to see if they're packed with grease.
 
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Old Nov 24, 2003 | 08:46 PM
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Since the dash light isn't coming on, your problem is definitely in the t-case or the shift module. The hubs might have problems, but there's no reason to suspect them yet. Read this article before doing anything else.
 
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Old Nov 24, 2003 | 09:35 PM
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Thanks for the reply guys. I figured out what the problem is thirty minutes ago. I'm not exactly sure what the part is called but it is a grey box that is, 5" wide, 7" long and 1" thick. It is located on the passenger side, right next to the heater box. It has three connections going into it. The box also says "United Technologies Automotive". You have to remove what I think is called a Kick panel to get to it.

Anyway. THat is the problem because sometimes it clicks and sometime it don't. I have to go to the junk-yard tomarrow to pick one up.

IF anyone knows what this part is called let me know so I can easily find it at the Junk-Yard. I bet Steve83 Knows!!

THanks for ALL the help.
 
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Old Nov 24, 2003 | 09:59 PM
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It's the transfer case shift control module, but how did you diagnose it as the source of the problem? I've never heard of one going bad - it's always the motor, the wiring, or the t-case itself locking up.

You can find that module in any Ford with pushbutton 4WD (not AWD), but I'd stick to '87-95 Broncos, pickups, & Explorers.

 

Last edited by steve83; Nov 24, 2003 at 10:02 PM.
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Old Nov 25, 2003 | 01:03 AM
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THanks Steve83 that's what I was looking for.

The reason I know it is the problem is simple. That control module is what makes that "click" noise when you press the 4x4 button. Mine only clicks when it wants to. It will click sometime and othertimes it won;t.

When it decided to work right the 4x4 will engage. WHen it doesn't I'm screwed. Also I;ve tried every other part. I replaced the Transfercase motor, I checked all the fuses, tested all the wires/switches, the only thing left is this darn module. Plus if it turns out not to be the problem which is IMPOSSIBLE. I can always return it to my junk-yard.

I will let you know tomarrow of if that fixed the problem. THanks so much for all your help!!
 
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Old Nov 25, 2003 | 03:57 PM
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Well I went to the junkyard and got the Module. It cost me $35.00. I replaced it and my 4x4 still DOES NOT WORK. I;m getting constant power to the motor now thanks to the new module.

I'm pretty sure that the transfer case motor the Junk-Yard gave me is seized. I will have to return it tomarrow.

I called my local ford dealer and they want $395 for a NEW transfer case motor. I think that is way too much. I;m really getting fed up with this electronic 4x4 crap.

I would really appreciate it if anyone could tell me where I can get a NEW or REBUILT transfercase motor for a reasonable price.

Thanks alot for all your help!!
 
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Old Nov 25, 2003 | 05:18 PM
  #9  
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The auto hubs stocked working this week. However, I can lock them manually and every thing works o.k. I will eventually replace them with manual Warn hubs as I did on my 97 F250. But until they quit working I will just "pretend" they are manual.

I am going to repack them like RVcams suggested and see if it is too much grease. Its been my experience with these hubs is not so much the mechanical part but the electrical part as Bronco351 pointed out, either relays motors etc. They aren't as strong as a Warn is a given.
 

Last edited by rlh; Nov 25, 2003 at 05:21 PM.
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Old Nov 25, 2003 | 06:38 PM
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The hubs aren't electronic at all - bronco351's problem is with the transfer case, which is totally separate from the hubs.

And the original hub locks ARE Warns.
 
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Old Nov 25, 2003 | 06:41 PM
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The motor may be shorted but be sure to check the connection first!!! The connectors are notorious for the green grunge syndrome...
 
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Old Nov 25, 2003 | 06:59 PM
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Originally posted by steve83
The hubs aren't electronic at all - bronco351's problem is with the transfer case, which is totally separate from the hubs.

And the original hub locks ARE Warns.
Actually, he said he had auto hubs and I was merely trying to make a point that while the automatic operation of a hub may not work when one hits the "Button" to engage the Tcase AND hubs, the may still be mechanically o.k and replacing the hubs isn't always required since they can still be locked manually anyway.

The reason I replaced my 97's hubs was that they were engaging by themselves. After replacing them once with auto hubs, I went with Warn Premium manuals.
 
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Old Nov 25, 2003 | 07:54 PM
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IT'S WORKING!!!!!!!

HI guys, I finally got my 4x4 working. I ran down to the junkyard and they gave me another transfercase motor that actually works. I hooked it up and everything works fine.

THe only problem I have now is that when I put the truck in Low-Range it slips terribly. The truck will rev-up to 2000 and then drop into second gear. I mean it;s loud, I scared a lady walking down the street!!

WHen I put the truck in 4x4 it works great!!

Tomarrow I'm going to change the fluid in the T-case. I bet it has never been changed. The old man before me never used the 4x4 (that's what he says). He did rebuild the tranny though.

Oh almost forgot, is it ok to put Soem kind of Transmission stop slip in the T-Case. After-all it does use ATF!!

If it matters this truck has 190,000 miles.

Thanks for the help in advance!!
 
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Old Nov 25, 2003 | 08:06 PM
  #14  
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Hey 351bronco, get 1 more Bronco and you will be tied with 3broncocrazu.
 
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Old Nov 25, 2003 | 08:16 PM
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Originally posted by rlh
...my 97's hubs ...were engaging by themselves.
Ford recognized that problem, and addressed it in the service CDs. They call it "motoring torque", and it's caused by the front driveline being tight. The cure is to lock the auto hubs then shift back to 2H and continue driving forward for ~250 miles to break in the hubs & bearings.

I realize you've already swapped; I'm posting the info for others who may read this thread later.

bronco351
Don't put anything but Dexron/Mercon in your t-case. It doesn't have clutches like a transmission, so additives can only hurt it. Your problem sounds more like a fault in your transmission.
 

Last edited by steve83; Nov 25, 2003 at 09:01 PM.
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