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Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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  #1  
Old 02-19-2009
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Need Help!!!!!

Okay, so my truck won't stay in 4wd. It will engage for a second then come back out. The light doesn't go out and there is no real noise. It is NOT the transfer case, hubs, axles, or 4wd switch. All of those are new and it was doing it before I replaced them and after. Can someone please tell me what to replace next? It is a 99 ext cab, 4.0 manual. And does this in low and high.
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Old 02-19-2009
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Hubs are new? Did you replace them with manual hubs or did you use the stock crap again? Also how do you know its not in 4wd? Did you place the truck on a lift or jack stand to see if all 4 tires spin?
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Old 02-19-2009
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Yes, hubs are new oem...I know its not in 4wd because when I was in the mudhole the front end would stop turning and I would be stuck. Take it out of 4, then put it back in and I would be going again. Then it would stop again. Did this all day.
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Old 02-19-2009
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shoulda upgraded to manuals...
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Old 02-19-2009
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You probably have a leak in the vacuum system. Also are you seeing the tires not turn or are you just assuming since the truck stops moving? You have to verify that the tires aren't turning. Remember that you have an open diff in the front and it is possible to spin one tire only.
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Old 02-19-2009
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electric or manual case? if its electric check the 4x4 control module behind the radio or the shift motor on the case its self.
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Old 02-19-2009
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its ur hubs...mine did the exact same thing.....y would u buy vacume hubs again?

avm hubs FTW!!!!!!!
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Old 02-19-2009
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You need AVM Manual hubs, I just installed some on my truck and they work great. I had the exact problem you had
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  #9  
Old 02-20-2009
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I got the factory ones because I bought a warranty with my truck and they replaced it all for free. And yes im sure the wheels aren't turning, 100%. It is definitely kicking back into 2wd. The vacuum leak is something I need to check. What about the module behind the radio? How would I check that? Also, I know its not the shifter on the tcase because it will go into 4 lo, like the gear ratio will change, it just won't engage the front wheels.
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  #10  
Old 02-20-2009
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Also the pv hubs, how do they work? Like is there an actual vacuum line that runs to them? Something that could be deteriorated or such? What would be the best place to check for vacuum leaks?
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  #11  
Old 02-20-2009
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does anyone have a link for the avm hubs for a 99, my F/R keeps blowing off. if i get into deep stuff with a heavy foot.
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  #12  
Old 02-20-2009
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i sent you a PM^^
....and yes there is a vacuum line that runs to each wheel. if you put in manual hubs cap the lines off.
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  #13  
Old 02-20-2009
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same thing happened to me and it was my transfer case and an electric linkage module thing its getting fixed right now.hope thte helps
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Old 02-20-2009
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Quote:
Originally Posted by kingquadrunner View Post
same thing happened to me and it was my transfer case and an electric linkage module thing its getting fixed right now.hope thte helps
he has a 99 so it won't be within the t-case.

is that going to be expensive to fix on your though?
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Old 02-20-2009
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As far as I know the 4wd system has its own computer and it sits on the passenger side kick panel. Well on my 2003 that's how it is.

Does the case actually shift into low range? If so then the case and computer are fine. The vacuum system is the same that operates the vents and there is a vacuum ball on the passenger side of the engine bay on top of the wheel well.
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  #16  
Old 02-20-2009
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If you have a warranty why don't you let Ford figure it out? Sounds like a vacc leak to me though and the hubs are coming unlocked. When it comes out of 4wd look underneath while you are spinning the tires in dirt or something. See if the front shaft turns.
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  #17  
Old 02-20-2009
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Okay, so I have verified that the front shaft and axles are still spinning, but the hubs are not engaged. Definitely thinking vacuum leak. So im thinking I may have to take it to a shop because finding a vacuum leak seems like a pita.....
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  #18  
Old 02-20-2009
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I had the same problems, bought new hubs, still same problem.
I found this link and permanently fixed the problem.
http://www.therangerstation.com/Maga...04/offroad.htm

Some people say it kills gas mileage, but the 01+ Rangers are all like this, but at least I know my hubs will always work.
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  #19  
Old 02-20-2009
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^^ did that to mine, couldnt really tell a difference in terms of gas mileage.





Quote:
Originally Posted by dcsports119 View Post
Okay, so I have verified that the front shaft and axles are still spinning, but the hubs are not engaged. Definitely thinking vacuum leak. So im thinking I may have to take it to a shop because finding a vacuum leak seems like a pita.....

Check your vacuum lines. Run your hands along all of them, if any of them deteriorate and bits come off in your fingers, replace them. Also you can check all of the connections to see if there are any cracks, or if one of them came off.
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  #20  
Old 02-20-2009
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That's a good find. I am gonna give that a shot.
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  #21  
Old 02-21-2009
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Quote:
Originally Posted by chainfire View Post
^^ did that to mine, couldnt really tell a difference in terms of gas mileage
I could not tell a difference in my mileage either.
Like I said earlier, I have no doubt that my hubs will always work.


Quote:
Originally Posted by dcsports119 View Post
That's a good find. I am gonna give that a shot.
I literally takes 5 minutes per side to do, it's free, and you won't ever have to worry about them again.
Good luck.
Brian.
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  #22  
Old 02-21-2009
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Don't take it to a shop, if you have a warranty take it to ford, that could of been the original problem and not the hubs!
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  #23  
Old 02-24-2009
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Well, I did the clip removal and still not engaging. Im guessing its just broke. I am going to order the avm hubs.
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  #24  
Old 02-24-2009
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Quote:
Originally Posted by 99offroadrngr View Post
he has a 99 so it won't be within the t-case.

is that going to be expensive to fix on your though?
im at school so i had to get i done by a dealer because no one else would touch it it cost me 2 grand
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  #25  
Old 02-24-2009
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Update: I got them engaging, and took it wheeling all day. Worked flawlessly. Hubs are staying engaged all the time, which is fine by me. I use 4wd almost as much as 2.
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