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Which hose is the pressure side of a 4L80E

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Which hose is the pressure side of a 4L80E

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Jun 25, 2011 | 11:10 AM

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Which hose is the pressure side of a 4L80E

Trying to hook up my transmission cooler which hose is the pressure hose front or back hose thanx

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Jun 25, 2011 | 12:23 PM

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Its the lower fitting closer to the front of the trans, thats the pressure port.
Make sure your cooler has its ports facing sideways or straight up, they can not be facing down, air can get trapped in the cooler. IF you mount it sideways, run the pressure line to the bottom of the cooler, so it forces the fluid up thru it.

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Jul 10, 2023 | 07:14 AM

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Quote:

Originally Posted by RARON455

Its the lower fitting closer to the front of the trans, thats the pressure port.
Make sure your cooler has its ports facing sideways or straight up, they can not be facing down, air can get trapped in the cooler. IF you mount it sideways, run the pressure line to the bottom of the cooler, so it forces the fluid up thru it.

If you're referring to to the end of the trans that mated to the engine the lower right port is the return port. The upper left is the output side.

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Jul 12, 2023 | 02:06 PM

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If it’s an early model where both ports are in front then the top port is fluid out and bottom is fluid in, late model rear port is fluid return

Last edited by Rsoup; Jul 12, 2023 at 03:19 PM.

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4l80, 4l80e, 92, auomatic, cooler, hoses, location, port, preasure, pressure, side, sideways, tranmission, trans, transmission

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