Home » Public Forums » GMCnet » [GMCnet] Aluminum diff cover, and trans pan leak.
| [GMCnet] Aluminum diff cover, and trans pan leak. [message #279689] |
Thu, 11 June 2015 23:10  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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The engine, and trans-axle out of Glenn, and BJ's GMC will be here tomorrow. John ( the new owner ) said that those items seem to have been having oil coming threw them. I think this has been discussed here. Since I don't have those items. I didn't fallow that subject. Is there a sealant that can be applied to the inside? I've seen coatings on the inside of gear boxes in the past.Bob Dunahugh
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279690 is a reply to message #279689] |
Thu, 11 June 2015 23:47  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Bob,
According to a chemistry professor I once had, in the early days of
aluminum automatic transmission housings they had that trouble, so sealed
them with water glass (Google it for more info & sources). That should
work for those pans also. Or, why not use regular old glyptal, as so
commonly used in engines?
Ken H.
On Fri, Jun 12, 2015 at 12:10 AM, Bob Dunahugh wrote:
> The engine, and trans-axle out of Glenn, and BJ's GMC will be here
> tomorrow. John ( the new owner ) said that those items seem to have been
> having oil coming threw them. I think this has been discussed here. Since I
> don't have those items. I didn't fallow that subject. Is there a sealant
> that can be applied to the inside? I've seen coatings on the inside of gear
> boxes in the past.Bob Dunahugh
> _______________________________________________
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279697 is a reply to message #279690] |
Fri, 12 June 2015 06:57 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Ken,
Back in the late '50s, I was working as a machinist for a company
that machined over 3k aluminum castings for high altitude oxygen
regulators for the Air Force. When completed and tested, they were
found to be porous. We thought we were going to get to do another
run, but instead they soaked them in water glass. The fact that you're
still alive shows that it worked.
I 1963 when I bought a turbocharged Corvair, I wrapped the exhaust
system ahead of the turbo with asbestos soaked in water glass to
hold the heat in. I warped several exhaust pipes out of shape, but it
was very fast while they lasted.(Ah, those were the days)
Gary Kosier
77 PB w/500 Cad
Newark, Oh
-----Original Message-----
From: Ken Henderson
Sent: Friday, June 12, 2015 12:47 AM
To: gmclist
Subject: Re: [GMCnet] Aluminum diff cover, and trans pan leak.
Bob,
According to a chemistry professor I once had, in the early days of
aluminum automatic transmission housings they had that trouble, so sealed
them with water glass (Google it for more info & sources). That should
work for those pans also. Or, why not use regular old glyptal, as so
commonly used in engines?
Ken H.
On Fri, Jun 12, 2015 at 12:10 AM, Bob Dunahugh wrote:
> The engine, and trans-axle out of Glenn, and BJ's GMC will be here
> tomorrow. John ( the new owner ) said that those items seem to have been
> having oil coming threw them. I think this has been discussed here. Since
> I
> don't have those items. I didn't fallow that subject. Is there a sealant
> that can be applied to the inside? I've seen coatings on the inside of
> gear
> boxes in the past.Bob Dunahugh
> _______________________________________________
>
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279698 is a reply to message #279690] |
Fri, 12 June 2015 07:04 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Your chemistry professor was right on, and the problem persists even with big time OE suppliers. The only difference is that now they use fancy anaerobic (cures when oxygen is excluded) stuff. It may be more difficult to stop now that the casting have been oil impregnated.
But No, I don't have a better answer. I do know that the materials used now cannot be counted on to seal a used part.
Were it mine, I would go with a penetrating epoxy only because I have experience with epoxies. To work well, it would require that the surface be etched.
Matt
Ken Henderson wrote on Fri, 12 June 2015 00:47Bob,
According to a chemistry professor I once had, in the early days of aluminum automatic transmission housings they had that trouble, so sealed
them with water glass (Google it for more info & sources). That should work for those pans also. Or, why not use regular old glyptal, as so
commonly used in engines?
Ken H.
On Fri, Jun 12, 2015 at 12:10 AM, Bob Dunahugh wrote:
The engine, and trans-axle out of Glenn, and BJ's GMC will be here tomorrow. John ( the new owner ) said that those items seem to have been having oil coming threw them. I think this has been discussed here. Since I don't have those items. I didn't fallow that subject. Is there a sealant that can be applied to the inside? I've seen coatings on the inside of gear boxes in the past.
Bob Dunahugh
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279700 is a reply to message #279697] |
Fri, 12 June 2015 07:00 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Gary,
What do you want to bet 99% of the GMCNeters never heard of water glass?
:-)
We're gittin' OLD!
Ken
On Fri, Jun 12, 2015 at 7:57 AM, Kosier wrote:
> Ken,
>
> Back in the late '50s, I was working as a machinist for a company
> that machined over 3k aluminum castings for high altitude oxygen
> regulators for the Air Force. When completed and tested, they were
> found to be porous. We thought we were going to get to do another
> run, but instead they soaked them in water glass. The fact that you're
> still alive shows that it worked.
> I 1963 when I bought a turbocharged Corvair, I wrapped the exhaust
> system ahead of the turbo with asbestos soaked in water glass to
> hold the heat in. I warped several exhaust pipes out of shape, but it
> was very fast while they lasted.(Ah, those were the days)
>
> Gary Kosier
> 77 PB w/500 Cad
> Newark, Oh
>
>
>
> -----Original Message----- From: Ken Henderson
> Sent: Friday, June 12, 2015 12:47 AM
> To: gmclist
> Subject: Re: [GMCnet] Aluminum diff cover, and trans pan leak.
>
>
> Bob,
>
> According to a chemistry professor I once had, in the early days of
> aluminum automatic transmission housings they had that trouble, so sealed
> them with water glass (Google it for more info & sources). That should
> work for those pans also. Or, why not use regular old glyptal, as so
> commonly used in engines?
>
> Ken H.
>
>
> On Fri, Jun 12, 2015 at 12:10 AM, Bob Dunahugh
> wrote:
>
> The engine, and trans-axle out of Glenn, and BJ's GMC will be here
>> tomorrow. John ( the new owner ) said that those items seem to have been
>> having oil coming threw them. I think this has been discussed here. Since
>> I
>> don't have those items. I didn't fallow that subject. Is there a sealant
>> that can be applied to the inside? I've seen coatings on the inside of
>> gear
>> boxes in the past.Bob Dunahugh
>> _______________________________________________
>>
>> _______________________________________________
> GMCnet mailing list
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> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279721 is a reply to message #279719] |
Fri, 12 June 2015 10:27 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I have sealed several, including mine, Ragusa transmission aluminum pans
using Glyptal insulating varnish. I purchase it from Eastwood. 'Taint
cheap, but quality seldom is. It works very well on newly cast aluminum. On
my pan, it was porous and did not leak for a while after I installed it.
So, I took the pan to a friend of mine who has a transmission shop. He has
a parts washer that works like a home dishwasher. It cleaned the pan very
well. Hmmmm? About that home dish washer? Naaaaah, bad idea. Don't go
there. Two coats of Glyptal applied with a throw away paintbrush, then a 2
hour bake in my powder coat oven. Feels like glass when cured. It says on
the can that it will air dry as well in 24 hours. Your results might vary.
Jim Hupy
Salem, Or
78 GMC Royale 403
On Fri, Jun 12, 2015 at 8:07 AM, wrote:
>
> And a bunch of the salespeople where you try to buy it, either.
> An undetermined number of years ago, I finally remembered to ask for
> "sodium silicate".
> That got an answer of: "Oh, we don't have that!"
> RonC
>
>
> On Fri, 12 Jun 2015 08:00:18 -0400 Ken Henderson
> writes:
>> Gary,
>>
>> What do you want to bet 99% of the GMCNeters never heard of water
>> glass?
>> :-)
>>
>> We're gittin' OLD!
>>
>> Ken
>>
>>
>
> Ron & Linda Clark
> North Plains, ORYGUN
> 78 Eleganza II
>
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279780 is a reply to message #279721] |
Sat, 13 June 2015 09:41 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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James Hupy wrote on Fri, 12 June 2015 10:27
So, I took the pan to a friend of mine who has a transmission shop. He has
a parts washer that works like a home dishwasher. It cleaned the pan very
well. Hmmmm? About that home dish washer? Naaaaah, bad idea. Don't go
there.
Jim Hupy
When the CFO was going to be gone for a few hours I would sneak my tool box and contents into the house and run most of the contents and the box through the dishwasher. It does a great job. I always ran it through a cycle after I was done to clean it. This worked well until I forgot to get the stuff out of the dishwasher before the CFO got home. Lets just say the CFO expressed much displeasure with the process.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279782 is a reply to message #279780] |
Sat, 13 June 2015 09:49 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Steve, Judy describes those types of activities as "Divorce Projects"
(grin) But , I have two huge roll a way tool chests, plus other cabinets
as well.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Jun 13, 2015 7:41 AM, "Steve Southworth" wrote:
> James Hupy wrote on Fri, 12 June 2015 10:27
>> So, I took the pan to a friend of mine who has a transmission shop. He
> has
>> a parts washer that works like a home dishwasher. It cleaned the pan very
>> well. Hmmmm? About that home dish washer? Naaaaah, bad idea. Don't go
>> there.
>> Jim Hupy
>
>
> When the CFO was going to be gone for a few hours I would sneak my tool
> box and contents into the house and run most of the contents and the box
> through the dishwasher. It does a great job. I always ran it through a
> cycle after I was done to clean it. This worked well until I forgot to get
> the stuff out of the dishwasher before the CFO got home. Lets just say
> the CFO expressed much displeasure with the process.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
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| Re: [GMCnet] Aluminum diff cover, and trans pan leak. [message #279794 is a reply to message #279782] |
Sat, 13 June 2015 11:49 |
Don A
Messages: 895
Registered: October 2008
Location: Dallas, TX
Karma: 0
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Senior Member |
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When I was a kid I washed tranny case of my Morris Minor in mom's dishwasher. Case included the clutch housing and the the tail shaft housing, All one loong case, just barely fit. But wow did it come out bright and shiny. Did run the washer empty a couple of times after and never tasted any oil!
Don Adams Dallas, TX
'76 26' Glenbrook, '90 Sidekick
rebuilt by R Archer, powered by J Bounds, Koba
[IMG]http://www.gmcmhphotos.com/photos/data/6109/G2.jpg[/IMG]
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