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Copper ATF Washers for Toyota? #5102962
05/11/19 10:37 PM
05/11/19 10:37 PM
Joined: Sep 2002
Posts: 2,909
VA
Gebo Offline OP
Gebo  Offline OP

Joined: Sep 2002
Posts: 2,909
VA
Just ordered some automatic transmission gaskets for my toyota and lexus. It says they are OEM and are copper. Is this correct? My old ones were aluminum. I thought I read somewhere not to put copper up against aluminum.
35178-30010 part number


'98 LEX LS400 295K
'02 4Runner 235K
'05 Lex LS430 85K
'07 Lex GX470 65K

Schaeffer Oil
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
(Subject to Change as the Wind Blows)
Re: Copper ATF Washers for Toyota? [Re: Gebo] #5102988
05/11/19 11:19 PM
05/11/19 11:19 PM
Joined: Dec 2006
Posts: 1,063
midwest
JamesBond Offline
JamesBond  Offline

Joined: Dec 2006
Posts: 1,063
midwest
My old BMWs use copper oem drain plug gaskets against aluminum pans and transmission cases, no problems. I heard that copper is softer than aluminum so it should be used with aluminum pans and cases.

Re: Copper ATF Washers for Toyota? [Re: Gebo] #5103261
05/12/19 09:30 AM
05/12/19 09:30 AM
Joined: Dec 2016
Posts: 200
Long Island, N.Y.
incognito_2u Online content
incognito_2u  Online Content

Joined: Dec 2016
Posts: 200
Long Island, N.Y.
Don’t quote me, but I seem to remember bad things happening when Aluminum and Copper “meet”.........something akin to galvanic corrosion.

Wait......disregard. Isn’t the Transmission pan steel?

Last edited by incognito_2u; 05/12/19 09:31 AM. Reason: On second thought...

2006 Jeep Commander 3.7 V6 -113k (PUP5W30/XG3600)
2006 Toyota Corolla 1.8 VVTi -82k (M1EPHM5W30/XG3600)
1999 Toyota Corolla 1.8 -86k (QSUD5W30/XG3600)
1998 Toyota Corolla 1.8 -65k (PUP5W30/XG3600)
Re: Copper ATF Washers for Toyota? [Re: Gebo] #5103286
05/12/19 09:52 AM
05/12/19 09:52 AM
Joined: Jun 2002
Posts: 13,078
The Motor City
Kestas Offline
Global Moderator
Kestas  Offline
Global Moderator

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The Motor City
Copper touching aluminum is only a problem in the presence of an electrolyte. If your car is like mine, there is an everpresence of oil around the drain plugs, excluding the electrolyte.

Re: Copper ATF Washers for Toyota? [Re: Kestas] #5103289
05/12/19 09:55 AM
05/12/19 09:55 AM
Joined: Sep 2010
Posts: 9,218
Texas
4WD Offline
4WD  Offline

Joined: Sep 2010
Posts: 9,218
Texas
I use Super Lube for things like that

Re: Copper ATF Washers for Toyota? [Re: Gebo] #5103335
05/12/19 11:07 AM
05/12/19 11:07 AM
Joined: Jan 2004
Posts: 5,993
northern Alabama
benjamming Offline
benjamming  Offline

Joined: Jan 2004
Posts: 5,993
northern Alabama
They've been using that part since at least 1994. No problem to use.

Re: Copper ATF Washers for Toyota? [Re: Kestas] #5104604
05/13/19 08:07 PM
05/13/19 08:07 PM
Joined: Dec 2016
Posts: 200
Long Island, N.Y.
incognito_2u Online content
incognito_2u  Online Content

Joined: Dec 2016
Posts: 200
Long Island, N.Y.
Originally Posted by Kestas
Copper touching aluminum is only a problem in the presence of an electrolyte.

Yes, I am well aware of that. I was referencing that the external plug of the pan would be subject to debris on the road, Road Salt in the Winter being one of them, which as we know does contain compounds (magnesium, calcium,potassium) that in theory will act as an electrolyte.
But like I stated, it’s a moot point as I believe the pan is made of steel.


2006 Jeep Commander 3.7 V6 -113k (PUP5W30/XG3600)
2006 Toyota Corolla 1.8 VVTi -82k (M1EPHM5W30/XG3600)
1999 Toyota Corolla 1.8 -86k (QSUD5W30/XG3600)
1998 Toyota Corolla 1.8 -65k (PUP5W30/XG3600)
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