Attention Gas/Oil Field Workers!!

[adsm08]

Don't drive your trucks on the highway with the hubs locked...

^that^ happens if you do it long enough.

 

[4.0B2]

OUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

keeps you in a job tho! lol

 

[adsm08]

OUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

keeps you in a job tho! lol

True. But that last picture was the water separator. It got caught by the drive shaft.

 

[daniel3507]

CARNAGE!! And a lot of it

 

[Ozwynn]

was that on a superduty?.... must have been if it took out the water separator......

 

[doorgunner]

OUCH!!!!!!!!!!!!!!!!!!!

 

[Sasquatch_Ryda]

Ummmm since when does that cause any issues? T case must have been low or something for that to happen....

 

[racsan]

must have been a low oil issue in the t/c. dad's '94 F250 was a former oil field truck. we brought it home & had to overhaul the front axle, had bad ball joints, oil seals & u-joints. i bet the hubs had been left in "lock" most of its life, t/c was horribly hard to shift in & out of 4wd, esp hard to get in or out of low range. alot of WD-40 later it was good to go. added a drain hole/plug to the front diff. transfer case fluid was nasty & a little low. with new fluids (& other assorted parts) it was good to go for a few more years. truck is still running but currently up for sale. (dad got a '05 F250 superduty now) id think that as long as the transfer case & front diff have oil it wouldnt be a issue running with the hubs locked. my ranger usually has the hubs locked in from dec-march. might not do that this year (damn front diff pinion seal leaking, only leaks when front driveline is turning) unless maybe that truck in the pic was running 90 mph for a long streach and thats why it blew things up (bet that was quite a bang!)

 

[adsm08]

Ummmm since when does that cause any issues? T case must have been low or something for that to happen....

We have seen a few of these since the oil fields started up around here. There are only two things they all have in common. Happened on the highway at high speeds, and the front hubs were locked.

Of course fluid level is kind of hard to determine after the case turns into shrapnel.

 

[wahlstrom1]

4wd (in anything other then Offroad use) is for getting unstuck... if you can't keep it on the road and driving in 2wd, hand over the keys to someone that can actually drive!

 

[Will]

That's a problem. No TSB on that?

 

[adsm08]

That's a problem. No TSB on that?

No TSB. Not even sure what symptom I'd put in for that. "Transfer case explodes" isn't exactly in the chart.

We did call Ford about it the last time, all they told us was "tell them to not drive on the highway with the hubs locked".

 

[racsan]

i know its extremely old-school, but the '77 we used to have was a full-time 4wd setup, had no front lockouts, front driveline always turned. you had a t/c knob with low, low-lock, n, hi, hi-lock. in lock the front & rear driveshafts were "locked" together, used in sno/mud conditions where you wanted both axles pulling, in low/high (not lock) there was a diferential action between the front/rear driveshafts and you wouldnt get the driveline binding when turning on hard surfaces. granted it was no hi-speed truck ,but could certianlly be driven highway speeds with no problems, front driveshaft was always turning no matter what. (and with a 400, C-6 & 4.10's you got 9mpg at best, no matter what)

 

[racsan]

i suppose at highway speeds, so much of the oil is being slung around the insides of the case that a bearing somewhere "high" in the case could starve of oil afte a certain period of time. sounds like a design problem. any specific model years involved here? wouldnt want dad to make a trip to toledo with the hubs locked out of habit & get a call to go get him.

 

[adsm08]

I've only seen it in trucks in the 6.4L years. The thing about your high bearing theory is that the upper bearings are always spinning anyway because power flow passes through there in all 3 modes. Plus if you look at that front drive shaft, that happened because it was spinning along with the rest of the drive train at 70 mph and one end suddenly stopped. The front axle spins nicely, it was a t-case bearing that stopped moving.