Warning! 4x4

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Feb 8, 2018 | 10:50 AM

Juza

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Warning! 4x4

Just happen to me and i still dont get how its possible...
i came home and park the truck on the driveway
it is pretty steep about 10 deg what the truck gauge show.. it is snowy and icey so i had 4x4 on i push the parking brake pedal to the floor and put the transmission to park and shut the truck off.
went inside for about 3 min. And then back out to for smoke and then it happend.. the truck start to slide downhill rear tires was lock but front tires was spinning? I start to run and try to catch it... and i just cath it when it slide cross road i jump in and got it stop just befor i would fall in to ditch.. start the truck and drove it back on our yard and park it again more flat spot...

so wht in the world happen...? My ex excursion sit in the same spot even more slipery times many winters and never had this kind of issue...

only thing i can think of is that the front auto hubs did unlock by themselfs.. i think i need to turn them on manually to avoin future accidents...

just crazy...

Feb 8, 2018 | 11:40 AM

redford

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From: Stephensville WI

I think I would put some sand on the driveway.

Feb 8, 2018 | 11:42 AM

17350kr

Mountain Pass

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Yes you need to put the hubs in lock. The auto function works off of vacuum and when the truck is off it can loose the vacuum and that is what happened to you.

Feb 8, 2018 | 12:00 PM

Juza

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Excursion auto hubs need vacuum pulse to lock and unlock so that cant unlock byself even if the vacuum line broke or leak..
i havent yet had time to study how these new hubs works..

Feb 8, 2018 | 12:07 PM

Juza

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Yes sand would add some friction and grip but sand on top of snow and ice on that slope wount be enough to hold the truck on place if front hubs goes off byself.. the rear tires cant hold the load..
and thats realy odd how it can unlock hubs byself..

Feb 8, 2018 | 12:10 PM

Buliwyf

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Got to love ice melting. Happened to our fleet. Arrived in the morning and 7 trucks in the middle of the lot all piled into each other.

You can lock the front hubs. But that'll likely just mean the truck sliding down hill with one front tire spinning backwards (forwards).

Feb 8, 2018 | 12:34 PM

6.2caribou

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From: Southwestern Pa.

Not the same issue but...years ago i had an old ragged out Ramcharger for a plow rig. It had a 4spd and 318 with 130k+ on it. One Sat am I took it to the local sportshop which had a steep incline in front. I parked as normal, trans in 1st...parking brake was non-functional or not used because it would hang up, but like a good dog it always stayed put. 20 mins or so later another customer came in and asked who parked their Ramcharger out on the road. Oops... I ran outside and found that it was slowly rolling down the incline backwards, one piston stroke at a time. I started to carry a wheelchock after that.