TRNW-2: 6l80 questio about sonnax pr valve

Sat Jan 4 18:00:25 PST 2025

2004r.   Ewww.  I'm glad those were gone when I got into the business.....
Richard Wardell

On Sat, Jan 4, 2025, 8:00 AM Dan Hogan via trnw2 <trnw2 at trnw.net> wrote:

> Randy,
>
> > ... The emergency blow-off becomes your primary regulator.
>
> And the hub weld on the 35R-1234 Housing! LOL.
>
> Thanks for the correction.  I knew Transgo's design was definitely drilled
> for the balance feed as we used to use many years ago, but I just assumed
> the stock valve was a similar design much like GM did the 4L60,E units with
> balance oil traveling via a drilled passage.
>
> Makes sense given the rest stop stem is so very long, but obviously I
> didn't look at the schematic close enough in the past.
>
> For those following along or still interested in the discussion, the stock
> 6L setup:
>
>
> 700r4 and 4L60E PR design (shown) and you can see balance oil fed and
> orificed via the drilled passage in the PR valve itself.  I remember in
> ancient history weren't there early 2004Rs with no balance drilled in the
> PR valve (no hole) and if you mixed up the pump cover and valves design
> wise, you ended up with an unbalanced PR and high line?
>
>
> ---
>
>
> Dan Hogan
>
> Buster's Transmission Service
>
> *https://busterstransmission.com <https://busterstransmission.com>*
>
> 704.847.5321
> ------------------------------
> *From:* Randolph Wilson <Randolph.Wilson at transgo.com>
> *Sent:* Friday, January 3, 2025 10:05 PM
> *To:* Dan Hogan <danhogan at busterstransmission.com>; Technical Discussion
> Forum <trnw2 at trnw.net>; Wayne <wagarrick at yahoo.com>
> *Subject:* RE: TRNW-2: 6l80 questio about sonnax pr valve
>
>
> The stock GM uses a very short land on the balance end and feed the
> balance oil in just in front of it through that cup plug. There is no feed
> hole in the valve. All aftermarket valves have a much longer land that
> rides in the unworn area deeper in the bore and provides greater stability.
> This longer land blocks the original cup plug feed. Our Transgo valve then
> feeds the balance oil through a drilling in the valve itself. You do not
> have to do any modifications to the pump. The Sonnax valve is solid and
> requires you to drill a long hole at an angle with a tiny drill bit to
> provide the balance feed.
>
>
>
> To answer the original question, as said by others, without drilling (ball
> or no ball) you will have no balance oil and thereby no pressure
> regulation.  The emergency blow-off becomes your primary regulator.
>
>
>
>
>
> *
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.transgo.com_&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=xqXnoWMLEgo0JAFj3B5dtvQLLGF6V7Cvn1DCF-Qkw4s&e=>*
>
> *Randy Wilson*
>
> *Technical Support Specialist*
>
> 2621 Merced Avenue El Monte, CA 91733 USA
> <https://www.google.com/maps/search/2621+Merced+Avenue+El+Monte,+CA+91733+USA?entry=gmail&source=g>
> Office: 626.443-7451
>
> *Calibration | Innovation |Performance*
>
> *
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.facebook.com_TransGo-2D600961476956220&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=dcm-TnEz7hJ4d1HVl7pFtjx_ekb3mNNy8cBCsF1pIi0&e=>*
>  *[image: 1475592640337_I]
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.instagram.com_transgoshiftkit&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=Z0T7Qx8_TKblv6ZVdM0Rj6OqO5oObGFrwID0hAZFtiU&e=>*
>  *[image: 1475592655171_t]
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__twitter.com_transgoshiftkit&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=O_fX5IsLbD2wmJuEkIP4h6AHeeJSNSp2-4JARHRERfE&e=>*
>  *[image: 1475592664972_Y]
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.youtube.com_channel_UCg6v9MzFmq7g3fy7-2Dr9PGIg&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=Bx5TgpwHenEpxX4WitDsXNgqrIUhA5aA8cUa3eqaF8Y&e=>*
>  *[image: 1475592672363_L]
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.linkedin.com_company_transgo1_&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=X8jON5hd3djcwlJVf7FkpIc-J26B4mpWVvJWyAiJtJw&e=>*
>
>
>
>
>
>
> *From:* trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> *On Behalf Of *Dan
> Hogan via trnw2
> *Sent:* Friday, January 3, 2025 5:21 PM
> *To:* Wayne <wagarrick at yahoo.com>
> *Cc:* Technical Discussion Forum <trnw2 at trnw.net>
> *Subject:* Re: TRNW-2: 6l80 questio about sonnax pr valve
>
>
>
> If you don’t drill but still the install the ball, you get no PR balance
> oil and high line pressure and reduced converter feed.
>
>
>
> Sonnax re-routes balance oil directly through the stator support casting
> by drilling to the pr balance spool cavity.
>
>
>
> Their PR is solid with no oil passage inside the stem like the stock
> design.
>
>
>
> The stock GM PR valve and other aftermarket valves feed balance oil via
> the existing orifice cup plug through the PR valve stem into balance
> cavity. Very GM like (700-4L60E style).
>
>
>
> If you drilled and left out the ball, I guess you may get too much balance
> oil as now balance oil can feed via the cup plug orifice AND the cross
> drilled passage. I suppose how much  depends on whether the balance spool
> could get pass the cup plug passage.
>
>
>
> I suspect it would still be an unbalanced condition and pressure
> regulation would be borked. I think Dan Tucker posted what happens when you
> don’t do either awhile back as they encountered it.
>
>
>
> —-
>
> Dan Hogan
>
> Buster’s Transmission Service
>
> Matthews, NC 28105
>
> 704-847-5321
>
> *https://busterstransmissionservice.com
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__busterstransmissionservice.com&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=Z5Bjs5KsVsqQZN5BIYyRlCMOKi6MzimvxD4pn0wVyGs&e=>*
>
>
>
> On Jan 3, 2025, at 7:52 PM, Wayne <*wagarrick at yahoo.com
> <wagarrick at yahoo.com>*> wrote:
>
>  Dan, wouldn’t that be the case if he DID install the ball, but not
> drill the hole, or is this imperative with Sonnax pr valve?
>
> Sent from my iPhone
>
>
>
> On Jan 3, 2025, at 7:33 PM, Dan Hogan via trnw2 <*trnw2 at trnw.net
> <trnw2 at trnw.net>*> wrote:
>
>  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.
>
>
>
> <Series-bw__1_.png>
>
> *Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube
> Circuits
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sonnax.com_tech-5Fresources_131-2Danatomy-2Dof-2Da-2Dtransmission-2Doil-2Dflow-2Din-2Dthe-2Dpump-2Dpr-2Dconverter-2Dcooler-2Dlube-2Dcircuits&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=dvvDCt70VzBIQ4976TcvsZMYy_d-7q2fwcBu6Az1U0NZ72us__KFtXJmjY-rrUR9&s=vpd1yMgx5ZLlNhdK_tHBueD1rxFieUyvWOFgEaetD30&e=>*
>
> *sonnax.com
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sonnax.com_tech-5Fresources_131-2Danatomy-2Dof-2Da-2Dtransmission-2Doil-2Dflow-2Din-2Dthe-2Dpump-2Dpr-2Dconverter-2Dcooler-2Dlube-2Dcircuits&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=dvvDCt70VzBIQ4976TcvsZMYy_d-7q2fwcBu6Az1U0NZ72us__KFtXJmjY-rrUR9&s=vpd1yMgx5ZLlNhdK_tHBueD1rxFieUyvWOFgEaetD30&e=>*
>
>
>
> —-
>
> Dan Hogan
>
> Buster’s Transmission Service
>
> Matthews, NC 28105
>
> 704-847-5321
>
> *https://busterstransmissionservice.com
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__busterstransmissionservice.com&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=Z5Bjs5KsVsqQZN5BIYyRlCMOKi6MzimvxD4pn0wVyGs&e=>*
>
>
>
> On Jan 3, 2025, at 6:47 PM, Ryan D via trnw2 <*trnw2 at trnw.net
> <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
> This message was sent from the TRNW Technical Discussion Forum (trnw2).
> You were sent this message because you have subscribed to our mailing list.
> If you don't want to receive these emails from TRNW in the future, please
> unsubscribe here:
> *https://urldefense.proofpoint.com/v2/url?u=https-3A__www.trnw.net_unsubscribe.php-3Fforum-3D2&d=DwICAg&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=BJx0f_ei5fGBEWxULUgw3GTCghmQR8NEo4JOv_Cn-5a-Nw6-lgJwAxRg1S9Uxe0G&s=8a3FFjaINoqh7aZM-bq29WbDU97RJYWL_YjflpA4Lmk&e=
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.trnw.net_unsubscribe.php-3Fforum-3D2&d=DwICAg&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=BJx0f_ei5fGBEWxULUgw3GTCghmQR8NEo4JOv_Cn-5a-Nw6-lgJwAxRg1S9Uxe0G&s=8a3FFjaINoqh7aZM-bq29WbDU97RJYWL_YjflpA4Lmk&e=>*
> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
> <https://www.google.com/maps/search/2825+Walnut+Terrace,+Modesto,+CA+95355?entry=gmail&source=g>
>
> This message was sent from the TRNW Technical Discussion Forum (trnw2).
> You were sent this message because you have subscribed to our mailing list.
> If you don't want to receive these emails from TRNW in the future, please
> unsubscribe here:
> *https://www.trnw.net/unsubscribe.php?forum=2
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.trnw.net_unsubscribe.php-3Fforum-3D2&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=fy0YD9mcHYjm9_Js_8TuM7u2Qijqlud3lWAd_8w3NrFWJMHNRM3U2xhBWTqeAVbu&s=RKtZY1vROThSKnhe44sLS0iAAOodQgttm53U_pkqP0g&e=>*
> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
> <https://www.google.com/maps/search/2825+Walnut+Terrace,+Modesto,+CA+95355?entry=gmail&source=g>
>
> This message was sent from the TRNW Technical Discussion Forum (trnw2).
> You were sent this message because you have subscribed to our mailing list.
> If you don't want to receive these emails from TRNW in the future, please
> unsubscribe here:
> https://www.trnw.net/unsubscribe.php?forum=2
> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 12854 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0009.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 431 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0010.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.png
Type: image/png
Size: 1135 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0011.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.png
Type: image/png
Size: 463 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0012.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image005.png
Type: image/png
Size: 394 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0013.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image006.png
Type: image/png
Size: 414 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0014.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 66127 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0015.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 214432 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0016.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 12854 bytes
Desc: not available
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250104/96d8c4d3/attachment-0017.png>