Home » Public Forums » GMCnet » [GMCnet] Magnet to pick up metal in the final drive
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| Re: [GMCnet] Magnet to pick up metal in the final drive [message #329794 is a reply to message #329789] |
Wed, 07 March 2018 15:56   |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Bob, the particles that are going to be a problem in the final drive are
the size of half a bearing roller or half a ring gear tooth. Preceeded by a
WHOLE BUNCH OF GNASHING AND GRINDING. The very small particles don't seem
to get all the way up to the filler plug, choosing instead to remain in the
nether regions on the final drive case. I have seen several grenaded final
drives, and it seems to me that they are just fine until they aren't, and
then you are on the hook. The last one I know about occurred last fall. The
pinion bearing cage failed as well as the pinion shaft where the pinion
bearing is pressed on. It howled like a banshee on deceleration, but made
very little noise on pulling. It got the owner home in one piece. There was
only junk left inside the case. If I can find the e-pics, I will send you
some. I am on my cell phone now. So, I question if the magnet in the drain
plug will have much value. Better to take off the cover and flush the case
out, the way you have been doing it.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Mar 7, 2018 12:17 PM, "Jon Roche" wrote:
> Have one on my 3.21. Do not think it is needed. It is custom, not
> store bought.
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
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| Re: [GMCnet] Magnet to pick up metal in the final drive [message #329805 is a reply to message #329794] |
Thu, 08 March 2018 00:28 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We use to supply the Magnet for the final drive drain plug for the Aluminum
cover that has the drain plug.
Should one have large partical, one is having an issue and it will damage
the unit.
We suggest people to drain it and refil.
We have supplied almost 3,000 final drive units and know of only 3 units
where a gear chipped off and caused a proplem.
We warrentied all and they had over 50-100,000 miles on them.
We have had few where the pion bearings have failed, again we took care of
it n/c .
On Wed, Mar 7, 2018 at 1:56 PM, James Hupy wrote:
> Bob, the particles that are going to be a problem in the final drive are
> the size of half a bearing roller or half a ring gear tooth. Preceeded by a
> WHOLE BUNCH OF GNASHING AND GRINDING. The very small particles don't seem
> to get all the way up to the filler plug, choosing instead to remain in the
> nether regions on the final drive case. I have seen several grenaded final
> drives, and it seems to me that they are just fine until they aren't, and
> then you are on the hook. The last one I know about occurred last fall. The
> pinion bearing cage failed as well as the pinion shaft where the pinion
> bearing is pressed on. It howled like a banshee on deceleration, but made
> very little noise on pulling. It got the owner home in one piece. There was
> only junk left inside the case. If I can find the e-pics, I will send you
> some. I am on my cell phone now. So, I question if the magnet in the drain
> plug will have much value. Better to take off the cover and flush the case
> out, the way you have been doing it.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Mar 7, 2018 12:17 PM, "Jon Roche" wrote:
>
>> Have one on my 3.21. Do not think it is needed. It is custom, not
>> store bought.
>> --
>> Jon Roche
>> 75 palm beach
>> St. Cloud, MN
>> http://lqqkatjon.blogspot.com/
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Magnet to pick up metal in the final drive [message #329811 is a reply to message #329788] |
Thu, 08 March 2018 08:16 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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BobDunahugh wrote on Wed, 07 March 2018 11:30Anyone find a fill plug with a magnet in it for the FD? Or put a strong magnet on the outside of the cover to retain metal on the inside. I change my FD gear lube every other year. Bob Dunahugh 78 Royale
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I have a friend in computers who disassembles a lot of old hard drives. They typically have a very strong magnet in them, and he gave me a few. I have been sticking one to the outside of my final drive cover (stock steel) and upon changing the oil, have found a very small mound of what I assume is metal (very fine) on the inside of the cover at the magnet location. I'm guessing it is good to pull that stuff out of the oil no matter how small it is. That is why magnets are standard equipment in 4WD transfer cases and some newer transmissions.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
[Updated on: Thu, 08 March 2018 08:17] Report message to a moderator |
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| Re: [GMCnet] Magnet to pick up metal in the final drive [message #329814 is a reply to message #329811] |
Thu, 08 March 2018 08:25 |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
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Senior Member |
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A good source of these strong magnets is eBay. I glue the small “neodymium” magnets on the fuel tank (but not too near the pickup), oil pan, and trans pan. You don’t need a very big magnet to do the job. I glue them on so no one accidentally plucks them off. They work just as Carl described.
> On Mar 8, 2018, at 9:17 AM, Carl Stouffer wrote:
>
> BobDunahugh wrote on Wed, 07 March 2018 11:30
>> Anyone find a fill plug with a magnet in it for the FD? Or put a strong magnet on the outside of the cover to retain metal on the inside. I change
>> my FD gear lube every other year. Bob Dunahugh 78 Royale
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> I have a friend in computers who disassembles a lot of old hard drives. They typically have a very strong magnet in them, and he gave me a few. I
> have been sticking one to the outside of my final drive cover (stock steel) and upon changing the oil, have found a small very mound of what I assume
> is metal (very fine) on the inside of the cover at the magnet location. I'm guessing it is good to pull that stuff out of the oil no matter how small
> it is. That is why magnets are standard equipment in 4WD transfer cases and some newer transmissions.
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
> Solar battery charging. GMCSJ and GMCMI member
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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1978 Transmode (403)
Pittsburgh, PA
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