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Pickups Ford Ranger Ford Ranger 4x4 Problems
120 messages, Last post on Oct 26, 2009 at 7:44 PM
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I have a 98 Ranger 4x4 143,000 miles and I thought I had a good idea on how the 4x4 works, but now I am starting to doubt myself.. I know that when you shift it into 4x4 the transfer case motor engauges the transfer case, which in turn locks the front drive shaft.. Now here is were I am lost, The front shaft is locked in,but I can still turn the CV's and the wheels spin free when holding the CV's. I have vacume to the Hub's. Now do the hub's have anything to do with the Front diff locking in and powering the front wheels,or should the front diff be locked in and the (CV's can't spin) with the front shaft when in 4wd.
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Replying to: dper299 (Mar 22, 2009 10:06 am) 
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Replying to: wiwally (Mar 22, 2009 1:50 pm) How does/is the front diff engauged ? I lifted the whole vehicle in the air, started the truck , put it into 4wd and everything turned with the exception of the wheels. But when I put the vehicle down and locked into 4wd the driveshaft is locked in and turns but the Cvs/front axles can spin free
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Replying to: dper299 (Mar 23, 2009 6:30 am)  work (and work the w/e shift!) I worked on an '01 which has Ford's latest setup (cv front axles with no disconnect other than the t-case) My parents had a '94 with auto locking mechanical hubs (still different from yours). You have managed to get a model year with what i would consider (and many, many others!) to be Ford's worst idea! (SORRY, but its true!) Here's what i found on your system: Your hubs are called Pulse Vaccuum Hubs (PVH) and are found on model years '98-'00. Basically vaccuum is supplied to each of the front hubs, which locks them in. They work off a vacuum pump which is supposedly located under your air filter box. Check to make sure it is working; if it appears like its working go on to the vacuum line(s)? that lead to the front axle from the pump and check for any leakage. Next check the front hubs. The locking hubs are the black caps in the center of each from wheel…..they snap on and off..(hard to take off without breaking a few tabs, so be careful)..There are seals on these hubs, one or both may not be holding the vacuum created by the pump. If you have a leak anywhere, the hubs are rendered useless. Best bet is to replace with manual locking hubs or this will be a continuous headache. Search AVM hubs on the net, you’ll be able to find Manual lockouts for it. OR TRY THIS..... FOLLOW THE LINK (copy and paste if you have to) http://www.therangerstation.com/forums/../Magazine/Apr04/offroad.htm Let me know what you think!
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Replying to: spyac3 (Jan 02, 2009 4:35 pm) |
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goes into 4hi but not 4low is it switch or something else anyone have this problem before
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Replying to: grumpy77 (Apr 15, 2009 9:05 am)
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Replying to: mmcfee2 (Apr 16, 2009 4:58 am) |
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Replying to: cessna180 (Jun 02, 2008 5:18 pm)
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| I switched into 4x4 low yesterday and it won't release. Any suggestions ? | |
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