[Rokker]

I purchased my chevelle three months ago.
I has now developed a clunk sound in the rear end when turning the wheels on a jack.
Specs, 1965 chevelle zz502, th400, 12 bolt gm. It has a locker in there, anyone have any ideas ?

the gearset is richmond 49-0095-1 by the way, 3,55:1
and there are springs inside of it, unforunately i didn`t take any photos of the inside.

 

[LeoP]

What ever it is, it is busted. Sorry.

 

[Rokker]

How do you now it`s busted ?
Is it repairable or should I be ordering a new one ?

 

[tlowe]

i would not say it is busted.
it is a eaton posi, which is ussually a very good unit. i would recomend atleast inspecting the internals. easy to take apart and can be a somewhat difficult to reassemble.
let us know when you are ready to check it out. all parts are available for it. tom

 

[tlowe]

it may not be the problem, could be a axle bearing, ujoint or some part of the posi internals or a bearing.
take your time and check the easy stuff.
it is a eaton 2 series posi, it also has a spacer to use the 3 series gears. tom

 

[MrBreez]

It's hard to tell from the pic but I don't see anything that looks broken, It looks like a stock GM carrier-you say it has springs in it -then it would be a posi, if it has 12 bolts holding the ring gear on it's a 12 bolt GM. As for the clucking sound, all rear ends will make a slight cluncking with no gear oil in the case, it's the backlash between the gears. If your pinion gear isn't wobbly ( up and down ) and the gears don't show any galling ( which it doesn't look like they do in your pic ) and if you don't notice it when driving your probably OK. The only other thing would be the clutches in the posi are worn out which would cause a noise when turning or the bearings would be shot which would make a noise when driving that you would definitely notice. If there is alot ( more than a 1/4 in. or so at the yoke ) of free movement in the pinion gear when you turn it back and forth while holding the ring gear still your pinion nut may have backed off allowing to much back lash but it's hard to tell that from a picture.

MrBreez

 

[Rokker]

Here are two videos, maybe they`ll give a better description ?
Poor filming though as I`m holding the camera in my mouth while turing the wheel haha.

Does this look normal ?

 

[Cameano]

It sure looks busted to me in that second pic. That crack lookin' deal that runs up to the cross shaft bore on both sides is just a little noticeable.

 

[animal69]

That sure looks like a crack to me!

 

[LeoP]

that is why I said it's busted, after 43 years in the repair business, I think I know a busted center section.

 

[Guest]

Ditto by me too, it looks to be a heck of a crack and I'm NO rearend guy at all..

I have a feeling it's going to come apart just like an egg.

pdq67

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[BillK]

These cracks

 

[Rokker]

of course !!(""/&!&!!!! how could I have overlooked that crack ?!?! I was focusing on the internals and the gears. :-(
Good thing i found what was causing the shaking in my car.
Stupid thing is that I was planning to take the car for a 650 mile ride this weekend and I`ve been looking forward to that trip for 3 months !!!

Would I be crazy to weld it together an drive carefully ? I friend of mine is a good welder and could help me with it..

 

[copoman69]

it sounds like to me that the pinion is mess up , i cant imagen how that could happen, tell what where you doing when it started to make this noise, was you doing a burn out , the fuild looks clean, just rip that bad boy apart , to easy and you will see it for sure, check the outer bearings normally that where your failure will begin, if it was low on fuild , thats what i would do, these rearends are not complicated, pull your c clip and remove your axels then remove the four bolts and pull the third member, just keep the shims left and right seperate, your going have to put it back to , then take some pictures also where the sound coming from the center or the sides

 

[Dave]

NO, You need a new carrier. No welding, no repair, just buy a new one, and have the rear re-set.

 

[Rokker]

I`ve been doing burnouts all the time ;-) the sound has been coming gradually the last week. been taking it easy but that`s easier said than done..
Don`t know if I have the time to fix this one before we leave though. Might be taking the 2.gen camaro wich is soo sweet too and will handle the trip too. but I was soo looking forward to kill some riser on our way though.

With rough driving this is what you have to expect, and that`s ok. But the timing of this happening now couldn`t have been worse.

What`s the strongest carrier on the market, suitable for street driving ?

And thanks for all the help guys !

 

[Dave]

Get an Eaton Posi carrier, get rid of the mini spool.

 

[Rokker]

Isn`t eaton what I have or is mine a stock 12 bolt posi ?

Been making some calls here and it seems like moser eaton or auburn series is the way to go. Kind of hard to know the difference between the two. But it seems like auburn is the strongest one, wich is what I`m after know. Anyone have experience with these units?

 

[rianbechtold]

But it seems like auburn is the strongest one

l

 

[Rokker]

I must have been funny in a way. I have no idea about rearends, so where making some calls and this is what I got out of it. Auburn gets good words from people here in Norway. though, for street/strip applications.

Other than laughing your guts out on a newbie give me a few lines of positivity instead, I just discovered that waiting for a complete new rearend will be 6-7 weeks.

Would you go for overhauling or complete new rearend ?