TRNW-2: 6l80 questio about sonnax pr valve

[Dan Hogan]

You will have no balance oil available which means the PR valve will be located in the high pressure position in the bore.

Converter charge will be reduced significantly so you may have poor or no engagements along with overheating and high line pressure (harsh shifts).   Bad news all around.

Great article by Sonnax’s Greg Nader on how this all works. Worth the read to understand the role of balance oil and regulating.

<https://www.sonnax.com/tech_resources/131-anatomy-of-a-transmission-oil-flow-in-the-pump-pr-converter-cooler-lube-circuits>
[Series-bw__1_.png]
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits<https://www.sonnax.com/tech_resources/131-anatomy-of-a-transmission-oil-flow-in-the-pump-pr-converter-cooler-lube-circuits>
sonnax.com<https://www.sonnax.com/tech_resources/131-anatomy-of-a-transmission-oil-flow-in-the-pump-pr-converter-cooler-lube-circuits>

—-
Dan Hogan
Buster’s Transmission Service
Matthews, NC 28105
704-847-5321
https://busterstransmissionservice.com

On Jan 3, 2025, at 6:47 PM, Ryan D via trnw2 <trnw2 at trnw.net> wrote:

I have a 6l80 here and the builder who built it before left out the little ball and didn't drill the hole for the sonnax pr valve. I remember reading that happened on here.
I was wondering what symptoms that would cause.
Thanks




--
Ryan
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