4wd issues - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 08-25-2013, 06:41 AM Thread Starter
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4wd issues

I have the front stock axle in my 97 OBS w/ automatic lockers, when i put her into 4wd and turn her hard she starts rocking back and forth and makes a rubbing/popping sound on the passenger side. When not in 4wd there are no issues.

I went and put her on jack stands front and rear and removed all the tires, engaged the 4wd and put the tranny into neutral with the engine off. By spinning the front drive shaft by hand it will turn both rear hubs and the front drivers hub. Passenger side doesnt turn. The hub will still turn freely by hand as if it isnt locked, so i imagine there is an issue with that automatic locker?

97 OBS F250 Ext Cab Long Bed 4x4 ZF Swapped

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post #2 of 8 Old 08-25-2013, 07:31 PM
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Sounds like the auto hub is either stuck or damaged. Also check all three front axle u-joints. If you need a auto hub have have some I will sell.

Jack
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post #3 of 8 Old 08-26-2013, 05:21 AM Thread Starter
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right on thanks, I was actually thinking of converting to manual hubs if that were the case. But i appreciate the help!

97 OBS F250 Ext Cab Long Bed 4x4 ZF Swapped

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post #4 of 8 Old 10-06-2013, 07:08 AM Thread Starter
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I replaced the hubs with manual lockers and it is still doing the same thing. It only occurs in 4wd, not when driving regularly. It makes a loping/rubbing sound when I drive straight, and if i turn then it starts to make a clunk/popping also. Would this be a U joint issue or something related to the diff?

97 OBS F250 Ext Cab Long Bed 4x4 ZF Swapped

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post #5 of 8 Old 10-06-2013, 09:35 AM
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pretty sure that's normal if you turn hard in 4x4 , same thing happens on my 89

-Jeremy

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post #6 of 8 Old 10-06-2013, 09:47 AM Thread Starter
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Originally Posted by 897.3alltheway! View Post
pretty sure that's normal if you turn hard in 4x4 , same thing happens on my 89
definitely not a normal sound, especially the loping/rubbing when going straight. She didnt used to do it, only started acting up after a few miles climbing in 4wd to get up a really steep incline on a dirt road.

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post #7 of 8 Old 10-06-2013, 02:00 PM
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Originally Posted by Boise Outlaw View Post
definitely not a normal sound, especially the loping/rubbing when going straight. She didnt used to do it, only started acting up after a few miles climbing in 4wd to get up a really steep incline on a dirt road.
OH , going straight no , turning hard hearing a rubbing/popping noise yes

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post #8 of 8 Old 10-07-2013, 05:35 AM Thread Starter
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after another inspection I noticed that the dust sleeves are either cracked/torn or missing from both U joints, and there was an obvious rubbing sound coming from one when the wheel was hand-turned on jack stands.

I'm still not sure about the popping issue, perhaps I'd just never hard-turned her enough to notice it before.

So now the big question is do I go through the effort of tearing apart the d50 to replace the u-joints, or go find myself a d60 and just rebuild that on my workbench probably should throw in trutrac just for good measure too

97 OBS F250 Ext Cab Long Bed 4x4 ZF Swapped

VO conversion, TS 6 Position Chip, E Fuel, 6637 Filter, EBPV delete + PCV Reroute, Diamond Eyes 3" Downpipe

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