TRNW-2: 10R80 water flow to cooler

[Dan Hogan]

Here's a couple diagrams by engine for a 2020 showing locations and components.  What year, model and engine?




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Dan Hogan

Buster's Transmission Service

https://busterstransmission.com

704.847.5321

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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of tucker tuckertrans.com via trnw2 <trnw2 at trnw.net>
Sent: Thursday, August 28, 2025 1:03 PM
To: Technical Discussion Forum <trnw2 at trnw.net>
Subject: TRNW-2: 10R80 water flow to cooler

Group

I have a 10R80 that has no water getting to the trans cooler with the TFT AT 220.  Attached is a photo of the 2 valves.  Can someone enlighten me on how this setup flows.  The Snapon scan tool has a cutoff Valve A and an engine valve.  A feels to be the top on in the photo and we can feel it activating but a thermal camera  show no flow through it.  The other valve must be in the 4 hose valve.  So which one is the transmission cutoff?

Dan Tucker

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