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Does this look ok? 489 Center?

Posted By: Suregrip391

Does this look ok? 489 Center? - 03/12/09 12:54 AM

I found a 3:55 chunk for my 8 3/4, it has a 489 case. Having never owned a 489 I wanted to know if this one looked damaged? It looks like its dented in to the lower right of the casting number. Is this normal? Or damaged? My 742 does not look like that. Sorry for the dumb question but just making sure its not junk...LOL

Attached picture 5086792-rear489.jpg
Posted By: DoctorDiff

Re: Does this look ok? 489 Center? - 03/12/09 01:07 AM

That is normal for '72-'74 489 casting third-members.
Posted By: JohnRR

Re: Does this look ok? 489 Center? - 03/12/09 01:08 AM

Pick at it ?

That doesn't look good ., but nothing a little jb weld won't fix ...
Posted By: Suregrip391

Re: Does this look ok? 489 Center? - 03/12/09 01:12 AM

Quote:

That is normal for '72-'74 489 casting third-members.


Does the MS number on the gear tell the date?

Attached picture 5086850-ratio.JPG
Posted By: JohnRR

Re: Does this look ok? 489 Center? - 03/12/09 01:14 AM

Quote:

Quote:

That is normal for '72-'74 489 casting third-members.


Does the MS number on the gear tell the date?



no I'm pretty sure that number will match a number stamped on the stem of the pinion , pick that broken looking section and maybe you will be able to see it .

what concerns me is the part number on that gear , thats way to early a number to be a 489 gear ... I think ... I have a 3.55 gear set down stairs I can look at .
Posted By: DoctorDiff

Re: Does this look ok? 489 Center? - 03/12/09 01:15 AM

The date is to the right. It is partially visible in the picture (2...).

The indention is part of the casting on the later 489 third-members.
Posted By: Suregrip391

Re: Does this look ok? 489 Center? - 03/12/09 01:17 AM

Quote:

Quote:

Quote:

That is normal for '72-'74 489 casting third-members.


Does the MS number on the gear tell the date?



no I'm pretty sure that number will match a number stamped on the stem of the pinion , pick that broken looking section and maybe you will be able to see it .

what concerns me is the part number on that gear , thats way to early a number to be a 489 gear ... I think ... I have a 3.55 gear set down stairs I can look at .



Thank you, if you can look at it that would be great. Any help appreciated.
Posted By: pete

Re: Does this look ok? 489 Center? - 03/12/09 01:27 AM

when it comes to rears do yourself a favor and listen to drdiff and no one else. Pete
Posted By: JohnRR

Re: Does this look ok? 489 Center? - 03/12/09 02:13 AM

Quote:

Quote:

Quote:

That is normal for '72-'74 489 casting third-members.


Does the MS number on the gear tell the date?



no I'm pretty sure that number will match a number stamped on the stem of the pinion , pick that broken looking section and maybe you will be able to see it .

what concerns me is the part number on that gear , thats way to early a number to be a 489 gear ... I think ... I have a 3.55 gear set down stairs I can look at .



Just looked at the gears , the MS # ??? it's not on the pinion stem . The date is there as Dr. diff says , its after the MS number , I see a 2 and then a 1 . the part number is correct , I forgot the ring gear doesn't care what housing it is in , it's the same ring gear they have been making since they started making 3.55's for 8 3/4 rears .

Oh wait , I'm not dr. diff and it appears he is the ONLY person ON the planet that knows ANYTHING about the 8 3/4 rear ... my bad .
Posted By: Suregrip391

Re: Does this look ok? 489 Center? - 03/12/09 08:57 AM

Thank you all for the help! Everyone, much appreciated~
Posted By: 70Cuda383

Re: Does this look ok? 489 Center? - 03/12/09 09:02 AM

a dented cast iron housing? I didn't know cast iron could dent! I would imagine it would crack before denting!
Posted By: 70Cuda383

Re: Does this look ok? 489 Center? - 03/12/09 09:21 AM

what happened to the good doctors website?

I enjoyed looking on there and dreaming of parts I cannot afford right now!
Posted By: pete

Re: Does this look ok? 489 Center? - 03/12/09 01:16 PM

. The date is there as Dr. diff says ,

I forgot the ring gear doesn't care what housing it is in ,


Obviously he is the only one who knows. Pete
Posted By: Anonymous

Re: Does this look ok? 489 Center? - 03/12/09 04:31 PM

Quote:

when it comes to rears do yourself a favor and listen to drdiff and no one else. Pete



Thats why i use Moser ONLY!!!...
Posted By: G-Money1320

Re: Does this look ok? 489 Center? - 03/13/09 05:31 AM

Its not a dent persay but a dimple, and I have seen them on numerous 489 cases. The one in the pic looks to have a crack in it though.
Posted By: DoctorDiff

Re: Does this look ok? 489 Center? - 03/13/09 05:50 AM

The crack appears to be dried mud packed into the casting dimple.
Posted By: JohnRR

Re: Does this look ok? 489 Center? - 03/13/09 12:06 PM

Quote:

The crack appears to be dried mud packed into the casting dimple.



which is why I asked if he picked at it ....
Posted By: Suregrip391

Re: Does this look ok? 489 Center? - 03/13/09 07:49 PM

Quote:

Quote:

The crack appears to be dried mud packed into the casting dimple.



which is why I asked if he picked at it ....



Hi Guys, sorry...No I have not picked at it. This is something I am buying and the seller sent me pics. I just did not want to buy something that was cracked or damaged. When I get it here, I will have a look and see. Thanks for the postings...It was a big help!
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