Transmission Fluid and gage on pump

  • rlwardne
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15 Feb 2019 19:35 #36644 by rlwardne
Transmission Fluid and gage on pump was created by rlwardne
What’s everyone using for transmission fluid? Secondly can a gauge be ported
In to check the health of the transmission pump?

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  • JIM.OBRIEN
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19 Feb 2019 01:27 #36658 by JIM.OBRIEN
Replied by JIM.OBRIEN on topic Transmission Fluid and gage on pump
I use Lubriplate SPO-277 in the transmission. It has worked extremely well in my transmissions.
As for the gauge it's very simple to add one in. you can pull the plug in the cap on the filter and tap a line for a pressure gage or put a pressure switch in there with a light on the dash or in the glove box.

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19 Feb 2019 02:57 #36659 by rlwardne
Replied by rlwardne on topic Transmission Fluid and gage on pump
What should I expect for pressure?
Thanks Randy

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20 Feb 2019 01:58 #36669 by JIM.OBRIEN
Replied by JIM.OBRIEN on topic Transmission Fluid and gage on pump
The pressure depends on speed, temperature, lubrication used, condition of the transmission, etc. Plan on 2 to 30 psi. The main thing is that you have oil flow.

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20 Feb 2019 15:53 #36674 by 1748 S
Replied by 1748 S on topic Transmission Fluid and gage on pump
Sadly the oil pump is driven by the differential pinion shaft. This is also the lower shaft in the transmission. So no oil pressure can be made with our cars sitting still at a stop light. Then once we start moving the rpm stays very low. Had the oil pump drive been driven off the top main shaft we would have had much better oiling of the transmission. These original transmissions never had any type of oil pump and one car was driven from the factory to the west coast and back.It failed by locking up a few hundred miles short of returning to the factory. This is a well known bit of information. They then had an Archimedes screw type oil pump. It was found to be lacking. So it was changed to what we have today. Even that oil pump can be modified to make more flow and pressure by using larger gears internally. Any good machine shop can do this work.


Gary Parsons

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  • rlwardne
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23 Feb 2019 22:27 #36703 by rlwardne
Replied by rlwardne on topic Transmission Fluid and gage on pump
Is there pressure there? It’s
sucking from the case to the pump as I understand it.
Randy

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