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1982 th400 in rv with 10 year old fluid in it. #4465658
07/20/17 11:54 PM
07/20/17 11:54 PM
Joined: Jan 2014
Posts: 500
AZ
leroyd92 Offline OP
leroyd92  Offline OP
Joined: Jan 2014
Posts: 500
AZ
Is it safe to say i need to change this fluid and filter?

The rv has been used maybe 5/6 k in the last few years when it was brought back to life.

My real question is If you guys would add anything to the fresh atf to maybe condition it?

Its in a p30 chassis. 84k miles total


Supertech Junky
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: leroyd92] #4465695
07/21/17 01:41 AM
07/21/17 01:41 AM
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
No, if you do a fluid change and filter change just use a good quality fluid, no additives necessary.

It might not even need a fluid change, but it's probably not a bad idea.


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: leroyd92] #4465968
07/21/17 09:54 AM
07/21/17 09:54 AM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
In a TH400, if the oil looks good and doesn't smell burnt, it's fine to leave it.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: leroyd92] #4466241
07/21/17 02:15 PM
07/21/17 02:15 PM
Joined: Jan 2014
Posts: 500
AZ
leroyd92 Offline OP
leroyd92  Offline OP
Joined: Jan 2014
Posts: 500
AZ
The fluid is clean and red.

I don't wanna do a swap if i don't have to. if i do end up doing it,i was going to collect the fluid and use it as upper cylinder lubricant ( its that clean )


Supertech Junky
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: leroyd92] #4466606
07/21/17 08:04 PM
07/21/17 08:04 PM
Joined: Dec 2013
Posts: 2,177
Fort Worth, Texas
clinebarger Online content
clinebarger  Online Content
Joined: Dec 2013
Posts: 2,177
Fort Worth, Texas
TH400's NEED the filter changed periodically!!! They are NOT screens.
I have seen my fare share of TH400's pulled into my shop on a hook with a wadded-up/clogged-up filter.

It's also a good time to replace the Suction Tube O-Ring & get all the brass out of the pan.

Use a Filtran Filter & a Farpak/Duroprene Fiber Pan Gasket, Torque the Filter hold down bolt & pan bolts to 96 Inch Pounds. Filter, O-ring, & Gasket


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: leroyd92] #4466818
07/22/17 12:11 AM
07/22/17 12:11 AM
Joined: Jan 2014
Posts: 500
AZ
leroyd92 Offline OP
leroyd92  Offline OP
Joined: Jan 2014
Posts: 500
AZ
Can you explain what makes the filter kit special? I bought a kit from oriley. Not sure if it has that oring but the filter and gasket look similar


Supertech Junky
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: leroyd92] #4468268
07/23/17 06:16 PM
07/23/17 06:16 PM
Joined: Dec 2013
Posts: 2,177
Fort Worth, Texas
clinebarger Online content
clinebarger  Online Content
Joined: Dec 2013
Posts: 2,177
Fort Worth, Texas
The filter in the link is (suppose to be) a Filtran filter, That's what GM/Hydramatic/Allison use from the factory.

The gasket is a fiber matrix gasket, It has to be kept flat during shipping/packaging....It cannot be folded up into a box, This is the reason auto part stores don't carry them.
GM started using this style gasket later in the TH400/3L80 production to eliminate leaks.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 1982 th400 in rv with 10 year old fluid in it. [Re: clinebarger] #4469261
07/24/17 07:28 PM
07/24/17 07:28 PM
Joined: Jan 2014
Posts: 500
AZ
leroyd92 Offline OP
leroyd92  Offline OP
Joined: Jan 2014
Posts: 500
AZ
Originally Posted By: clinebarger
The filter in the link is (suppose to be) a Filtran filter, That's what GM/Hydramatic/Allison use from the factory.

The gasket is a fiber matrix gasket, It has to be kept flat during shipping/packaging....It cannot be folded up into a box, This is the reason auto part stores don't carry them.
GM started using this style gasket later in the TH400/3L80 production to eliminate leaks.


I returned my fk106 filter kit and bought that one.

I vividly remember selling my suburban 1 year after replacing the pan and the rubber seal was leaking/ cracked / split.


Supertech Junky

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