[bigbroncojeff]

anone donr this before.... or maybe have any idea what could have made this happen?? was trying to replace my pinion seal today and couldnt get the pinion nut to hold it tight... after some thinkin i gave up ad decided to just take off the dif cover.... saw this:shocked .... looks like i am regeraring now or grabbing a 10.25

hard to tell from picture... but it's groved pretty bad... this wore down the pinion gear too:banghead

 

[1clean5.8]

my Solid axel has the same problem

 

[jopes]

bearings are shot

 

[Andy351]

loose pinion nut?

 

[Shadofax]

Loose pinion nut, bad bearing, combo of both, but I would think the loose pinion nut would have had to occur first.

 

[quiefinator]

i say burnouts till she blows, then 10 1/4 or 9

 

[bigbroncojeff]

bearings are shot

the pinion bearing was fine... or are you talking about the ones on the carrier?

loose pinion nut?

it seemed to be on there pretty dang tight... and now it's on all the way... as in i ran out of threads to make it go dow tighter. my brothers was loose once and we cranked it back down.... his didn't have these marks on the carrier


guess either of these could have been the problem.... the pinion is trashed now though

 

[RTM]

I have a trac loc like this and it came from an axle that had bad pinion bearings.

 

[SigEpBlue]

How was the crush sleeve? If not the bearings, that's just about the only other thing I can think of off-hand.

 

[bigbroncojeff]

How was the crush sleeve?

looked like any other crushed crush sleeve that i have ever seen

there was lots of metal on the magnetic fill hole bolt

 

[appy]

Need a 9"?

 

[Larston]

I would guess that the pinion bearing cups weren't fully seated when the diff was built. I've see it a couple times, almost had it happen on one of my diffs. A buddy of mine had it happen on a brand new OX locker, destroyed the diff due to metal shavings.

 

[joshbronco]

Had the same problem on my Bronc. Was the pinion bearings, allowed the shaft to shift and strike the carrier. The shop was amazed that I could still drive the truck. The carrier came out in 4 pieces, took a tooth off the ring gear and several teeth off the spider gears. Have some pics around here some weres.

 

[Andy351]

sounds like the pinion nut got over tightened, once that happens your crush sleeve is junk and your pinion depth and preload is toast no matter how tight you make the pinion nut. at the very least you will need a new crush sleeve. (which btw should be more than "good and tight". its more like "tight as i can get it with my big ****ing impact gun")

 

[bigbroncojeff]

Had the same problem on my Bronc. Was the pinion bearings, allowed the shaft to shift and strike the carrier. The shop was amazed that I could still drive the truck. The carrier came out in 4 pieces, took a tooth off the ring gear and several teeth off the spider gears. Have some pics around here some weres.

8.8s only have one pinion bearing .... making them more susceptible to this right??

oh wait... i don't care anymore.... i got a 10.25:toothless

 

[Andy351]

how do they only have 1 pinion bearing?

 

[Steve83]

They have 2, just like a 10.25" or most others. The 9" is an oddball with 3 because its pinion gear shaft is too short & weak without the pilot bearing.

 

[bigbroncojeff]

They have 2, just like a 10.25" or most others. The 9" is an oddball with 3 because its pinion gear shaft is too short & weak without the pilot bearing.

yep... i just looked at the diagram again... guess i missed something last time and proceeded to confuse myself... just now i was looking for all your diagrams of stuff... it doesn't have a support bearing on the inside... but it still has two

 

[welndmn]

Crush sleve.
Also remove the carrier and check it, I would bet you have a split carrier bearing, or a cracked carrier.
One just left my garage for the same issue.
I found a crack in the carrier.

 

[MikE2]

Loose pinion nut, bad bearing, combo of both, but I would think the loose pinion nut would have had to occur first.

probably exactally what happened