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Diff Drain Plug Kit from Corvette Central ?

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Old 07-07-2010, 02:36 PM
  #21  
wcsinx
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Originally Posted by turtlevette
Why does everyone drill the case.? Anytime you drill it creates a potential stress point where a crack can develop.

When and if i do mine, i'll drill the rear cover.
The cover is a structural component as well especially in a C3.
Old 07-07-2010, 03:54 PM
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...Roger...
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Originally Posted by Red 71
I drilled a 1/8" pipe tap hole about 3" back from the yoke
Thats where I put mine , a little more forward than Noonie's. I use a floor jack to drill mine.
Old 07-07-2010, 04:06 PM
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roy69
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Originally Posted by 7T1vette
Somebody thought it was a good idea...
Actually, I think somebody thought somebody else would buy it.
Old 07-07-2010, 04:12 PM
  #24  
Bob Heine
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Originally Posted by noonie
You don't have to drill under the bracket.
Here is the best spot. It's at the lowest point in the diff and yet you still miss the pinion race boss and bracket by a bunch.

Nice thing about a drain, you can flush to clean the inside a bit.
I think you've got the winning location. I don't recall ever seeing a case failure that began in that area.

I also like your bolt for a drain plug. Pipe plugs are tapered and act like a wedge in the hole. Seems to me that a straight thread would put less stress on the case and you could ensure a good seal with one of those copper brake line washers.

Are you planning to offer the drill, tap and bolt with washer, along with a pre-drilled cardboard template for $7.70? If you don't, I bet a kit from China will be available trough Corvette Freight in a couple of months.
Old 07-07-2010, 04:45 PM
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Curby
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I have a magnetic plug in mine (I just have to be better than everyone else!)



It was super easy to do the 500 mile fluid swap and all the metal shavings were stuck to the magnet!

Old 07-07-2010, 04:57 PM
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Originally Posted by Curby
I have a magnetic plug in mine (I just have to be better than everyone else!)
Sweeeet
Old 07-07-2010, 05:31 PM
  #27  
Red 71
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Originally Posted by Curby
I have a magnetic plug in mine (I just have to be better than everyone else!)



It was super easy to do the 500 mile fluid swap and all the metal shavings were stuck to the magnet!

Showoff!!!
Old 07-07-2010, 10:02 PM
  #28  
turtlevette
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Originally Posted by wcsinx
The cover is a structural component as well especially in a C3.
absolutely, my line of thinking is that the cover is cheap to replace if it does start to crack.

I'll just continue to pump it out. I think Jiffy Lube can also do this. Mine has a ton of metal in it. One of the yokes has worn past the c-clip.

Last edited by turtlevette; 07-07-2010 at 10:04 PM.
Old 07-07-2010, 10:14 PM
  #29  
...Roger...
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Originally Posted by turtlevette
absolutely, my line of thinking is that the cover is cheap to replace if it does start to crack.

I'll just continue to pump it out. I think Jiffy Lube can also do this. Mine has a ton of metal in it. One of the yokes has worn past the c-clip.
Better for cornering.
Old 05-23-2012, 07:16 PM
  #30  
travelerbob
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Originally Posted by dburgjohn
Looks like you drill and tap a hole in the bottom of the diff with a paper template to mark where to drill. What I can't figure out is how you drill all the way into the diff without getting shavings inside the diff.
That's why you don't drain the oil. When you break thru the oil flushes out any chips, also the spiral flutes of the drill pull out 99% and the tap usually hold the small chips.
Old 05-23-2012, 07:18 PM
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Originally Posted by ...Roger...
Better for cornering.
Then you don't have to worry about a few lil chips ;-)
Old 05-23-2012, 09:31 PM
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gcusmano74
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Originally Posted by ...Roger...
What the hell is that hole saw for ?
The hole saw is for making a through hole in the strut bracket. The hole in the bracket needs to be slightly larger than the pipe plug in the diff housing. The holes are spotted a bit off center so that you miss the ring gear.
Old 05-23-2012, 09:36 PM
  #33  
'75
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This thread is only 2 years old, seems like someone restarted one from 2004 the other day.
Old 05-23-2012, 09:48 PM
  #34  
gingerbreadman1977
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Originally Posted by Red 71
Sucky-sucky machine does not work that well for this.

.
My sucky sucky works very well. I just used the pump that comes on the fuel line for outboard motors. Attach some vacuum hose on each end and it pumps just about anything from anywhere. In saying that I have dumped diff oil plenty of times and never found anything but clean oil. No need to drill a drain plug.
Old 05-23-2012, 10:30 PM
  #35  
Ray Y
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WOW this is an old thread....I started it originally.

So... I do have a drain plug now, but it was part of a Gary Ramedi 12 Bolt install and not part of the questionable kit.



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