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Old 03-07-2009, 09:52 PM
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welded spider gears- can it be undone ?

a buddy of mine has an 8.5" rear that is 88-up style.

previous owner welded the spiders in it

can we reverse this by getting new spiders ?

or?


how to remove the welds enough spiders ?

they would be welded to the axle shafts only right ?

or would all four spiders be welded together also ?


hmmmm


thanks

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Last edited by fast68; 03-08-2009 at 12:09 AM.
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Old 03-07-2009, 11:43 PM
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Depens on how they welded it,if spider to axle grear to spider,yes but if they welded to ring housing they may not . Going to need to look at it to know.
your mostlikely better off getting another rear from a U-pick
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Old 03-08-2009, 12:11 AM
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ah ok i see so there is more than one possibility ok hmmm


is there any good way to remove the welds even if they didnt weld it very much ?

all the yards here want 500 bucks for a simple 8.5" axle

its insane...

heck we buy trannies for that much from the yards when replacing burnt up ones for FWD variants..

crazy..



thanks
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Old 03-08-2009, 07:48 AM
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Quote:
Originally Posted by fast68
a buddy of mine has an 8.5" rear that is 88-up style.

previous owner welded the spiders in it

can we reverse this by getting new spiders ?

or?


how to remove the welds enough spiders ?

they would be welded to the axle shafts only right ?

or would all four spiders be welded together also ?


hmmmm


thanks
When you weld spiders gears,They aren't welded to the axles.
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Old 03-08-2009, 08:06 AM
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Hi there, Usually spider gears are welded up in the low spots between each of the Teeth to prevent them from being able to rotate. This can be reversed by simply replaceing the spidergears as you suggested. As to being welded to the axle I'm familure with but I guess it is possible and the only way to find it to take it apart for inspection. If this is the case I would recommend replacing the axles and the spiders. Hope this is helpful.
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Old 03-08-2009, 12:47 PM
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Have you even pulled the cover yet?

It should be readily apparent as to what is welded. IF you can get the cross-pin out and the axles aren't welded, you 'should' be able to roll the spiders out of the carrier and bust them with a 5 pound hammer.
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Old 03-08-2009, 12:49 PM
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You'll need to remove the welds in order to get the old spiders out. They must be able to rotate independently of each other to be removed from the housing. Not sure what type of tool will be able to (fit in there and) do the job, surely a torch if nothing else!

Russ
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Old 03-08-2009, 01:06 PM
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Once the cross-pin is out and both axles are free, they'll slide right around on the thrust washers.
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Old 03-08-2009, 02:22 PM
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No disrespect, but I beg to differ. I've actually done this before, lying on my back in a mud puddle removing and replacing shattered spider and side gears on the stock (non-welded) 8.5" GM rear in my old '66 Chevelle.

The crosspin needs to come out, next the c-clips, then slide the axles out a few inches. Now, take a good look at the spider/side gear arrangement: if they are truly welded together, do you really think this four gear "mass" will come out through the opening in the housing without being broken down again into single gears?

Just trying to get you prepared for what will be necessary...

Russ
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Old 03-08-2009, 02:34 PM
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Quote:
Originally Posted by S10xGN
No disrespect, but I beg to differ. I've actually done this before, lying on my back in a mud puddle removing and replacing shattered spider and side gears on the stock (non-welded) 8.5" GM rear in my old '66 Chevelle.

The crosspin needs to come out, next the c-clips, then slide the axles out a few inches. Now, take a good look at the spider/side gear arrangement: if they are truly welded together, do you really think this four gear "mass" will come out through the opening in the housing without being broken down again into single gears?

Just trying to get you prepared for what will be necessary...

Russ
Not sure about the 8.5,But it will in a 9''
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Old 03-08-2009, 05:44 PM
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Been a while since I've seen the insides of an 8.5 but a 7.5/7.625 needs them to be seperated like stated earlier.

I know they will rotate so you can get a good whack at them with a hammer, and if that doesn't work at least you can get a torch to the cross pin spiders, keep water VERY handy though. And also rememebr that gas tank right above your head, just hope it doesn't have any leaks.
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Old 03-08-2009, 09:39 PM
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ok good info here thanks guys.

basically it seems we might have a chance to fix this as long as the spiders are not welded to the axle shafts

because im thinking that using the torch to remove the welds from the shafts will just ruin them

presumably

hmm

i realize that we have a very minute chance of reversing the welded spiders in this axle but i was just looking for some info, feedback, tips, and ideas, etc

technically we should pull the diff cover and inspect the weld job, because this is alot of speculation until then really haha


thanks!!
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Old 03-08-2009, 10:31 PM
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Quote:
Originally Posted by M&M CUSTOM
Been a while since I've seen the insides of an 8.5 but a 7.5/7.625 needs them to be seperated like stated earlier.

I know they will rotate so you can get a good whack at them with a hammer, and if that doesn't work at least you can get a torch to the cross pin spiders, keep water VERY handy though. And also rememebr that gas tank right above your head, just hope it doesn't have any leaks.
Water on an oil or grease fire is VERY BAD& DANGEROUS,It will shoot the flames up much bigger than they were. dry chemical or sand is best.
I'n Short DON'T DO IT
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Old 03-08-2009, 11:02 PM
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Quote:
Originally Posted by fast68
ok good info here thanks guys.

basically it seems we might have a chance to fix this as long as the spiders are not welded to the axle shafts
This would be a first for me,I have ''NEVER'' seen spider gears welded to the axle.I have welded some before,But never to the axles.
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