| [GMCnet] Transmission External Filter [message #72560] |
Mon, 01 February 2010 23:19  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
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Senior Member |
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G’day,
The messages discussing the mileage between trans fluid changes got me to
thinking (smell the wood burning?) I reckon that having an external filter
on the trans might not be a bad idea. To see where the best place to install
it I wanted to check the oil flow paths. I checked Maintenance Manual X-7525
– Nothing. I checked MM X-7625 – Nothing. I checked MM X-7725 – Nothing! I
have a copy of the 1967 Oldsmobile manual and found it in there.
From what I can tell the fluid enters the filter in the sump, goes to the
pump and from the pump to the pressure regulating valve. There are two
outlets on the pressure regulating valve, on goes to the torque converter
the second to several other components in the transmission.
The two lines that go to/from the cooler are labeled “LUBE” and “CONVERTER
RETURN.” One would assume that “CONVERTER RETURN” is the line from the
cooler so “LUBE” is to the cooler.
I think that if you were to add an external filter that it would be best to
put it in the “LUBE” line to the cooler because if you did have a trans
failure it would keep a lot of crap from getting to the cooler.
Comments please.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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