Help. Spider gears went out of my 2000 Blazer 4x4. The retaining bolt
that holds the pin in place is shirred off. Pin will slide up and down
slightly and will turn all the way around but I still can't get the pin
out. I have tried hitting it to get it out but it will not come. Any
suggestions will be greatly appreciated at this point. I have never
attempted this before and am wondering if I am going to be sorry.
Thanks for the info.
This usually happens when you spin one wheel ,like when in snow. One of the
small gears "sticks" to the pin and twists off the bolt. Only thing you can
do is hit the shaft from the opposite end. The end without a bolt. You are
going to end up destroying the carrier, but there is no other way to get the
axles out so you can remove the carrier. You need a piece of rod about the
size of the pin and a big hammer. Don't swell the end of the pin or it will
never come out. IE, don't bang on a socket or an extension. Find a rod with
a flat end and a really big hammer. Hold the rod with a vice grip and not
your fingers:) Hit it square and hard. You may need to disconnect one end of
the shocks to get he rear low enough to get a good swing. By time you get
done getting it apart and replacing parts, it may be a lot easier to replace
the entire rear axle. Just be sure you get the same ratio as the original
one or the four wheel drive will bind.
Sometimes after the retaining bolt shears, it has little or no tension
on the remaining piece of bolt still screwd into the pin. The tension is
originally just under the head of the ret. bolt head and its mating surface,
& when the bolt has sheared, it leaves the remaining piece of bolt almost
'finger-loose'. In these cases, you may be able to use a sharp, small-ended
punch & hammer and gently tap it counter-clockwise to screw it out
Should this not work, I'd attempt a "dental-grinder" and dress the
surface of the pin where the ret. bolt head originally hugs before
attempting removal, so as not to cause further damage to the differential.
As a last resort, you can do as Big Al suggested.
Here's hopes you are among the lucky! I've had this work a few times!
I've done a lot of these and it's usually the gear that's stuck to the shaft
that's the problem. The bolt he's talking about has threads near the head,
but the rest is just a pin. Here is a picture:
And some drawings that will show the problem he's facing:
The bolt sheers when the pin twists. It's broke way in the carrier flush
with the pin.
Thanks for the great pics and info. However the problem is still the
same as it was before. We cannot get the pin or shaft whatever it is
called to come out of the gear. The retaining bolt is not the problem.
We have beat on it and beat on it and it will not slilde out. It moves
a bit up and down, but that is all the farther it will go and we can't
proceed any further obviously until the shaft is removed. We do not
know what to try next. Really frustrated and can't get any info
anywhere on what to try next. Help some more!
Big Al wrote:
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