• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Hey..........Lets play "what REALLY happened?!"

Junkyard

Senior Member
Joined
Jun 5, 2016
Messages
3,636
Location
Claremore, OK
Occupation
Field Mechanic
I’m gonna say spinning in slippery crap and then immediately finding good traction thus creating shock load. In the heavy haul world I’ve seen shock load from missing gears do massive damage too.

Ring gear bolts and holes look ok for the most part so I’m guessing they stayed tight until it came uncorked.
 
Last edited:

DMiller

Senior Member
Joined
Feb 21, 2010
Messages
16,582
Location
Hermann, Missouri
Occupation
Cheap "old" Geezer
I'm a leanin on the Shock Load side myself, unless he was doing 80 and a ring bolt just happened to fall into the gearing. ZOWIE!! What series Spicer is it? and WTF is it out of?
 

crane operator

Senior Member
Joined
Mar 27, 2009
Messages
8,323
Location
sw missouri
I pulled a third member out two years ago, and 1/2 the bolts were laying in the bottom of the housing, so I'm going with broken or walked loose bolts holding the gear to the carrier, and one of the bolts hung up in the gear breaking the tooth.

He had to hit it pretty hard to break the gear though.

And he might just drive like I do- theres always that possibility.
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,440
Location
Oklahoma
I forgot to say, This is not a job I personally am doing. The story I got from the guy that removed it was the truck was stuck and they used another truck to attempt to pull it free. The ring gear is NOT riveted, its bolted. This truck was bought used by the customer and supposedly this diff only has around 25000 miles since replaced. The damage is so bad that it is difficult to determine a cause. I was asked what could cause this...……….which is why we are playing...………."What REALLY happened!?" I'm liking everything I am seeing so far...………..your guess is as good as mine at this point.:D
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,440
Location
Oklahoma
oh, and this is a rear diff assembly from a Freightliner dump truck with a pony axle. I would have thought the driveline would have twisted up before that ring gear broke.
 

Old Doug

Senior Member
Joined
Oct 16, 2013
Messages
4,545
Location
Mo
New driver or farm hand i see this stuff all the time.It cost around $3000.00 for every new driver if he tears up less than $ 1500.00 in his first year he is a keeper.
 

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,165
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
I'll go with "that's the way it was when I came back from lunch"....

Sounds like the place I worked!

At the quarry where I ended up working after high school before I worked there they had a stocking truck driver who every time he took a day off and they put someone else in his truck the clutch would fail. He would bitch about so-in-so wrecking the clutch. Well after that happened a couple times someone got smart. Might have been my dad's idea as he did do some of the wrenching work back in those days.

One day this driver called in sick. Foreman said, "No one touch that truck!" Sure enough driver shows up next day and after first trip to stock pile he's bitching about someone burning up the clutch in his truck! Then they broke the news to him that no one so much as touched the truck.

Not sure if it helped improve his driving but at least he didn't pull that one again!
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,600
Location
Will county Illinois
Occupation
Mechanic
I'd be curious what the dog clutch looks like on the power divider. That and the splines on the through shaft.
I would also want to put a dial on the carrier. It has to be tweaked. Plus I'll bet those thrust washers in the diff are smashed paper thin , if not cracked
 

RZucker

Senior Member
Joined
Jul 7, 2013
Messages
4,077
Location
Wherever I end up
Occupation
Mechanic/welder
While we're talking about abuse, I heard somewhere of someone using their creeper as a cart for rolling third members out from underneath trucks, anyone else heard that rumor?
I don't know about that, but I had a jackass bar one out and let it drop on the concrete, that was his second strike.
 
Top