TRNW-2: 68rfe Rev Max parts

Thu Oct 23 08:44:13 PDT 2025

Dave,
The Sonnax switch valve works fine with the Transgo Tuneless kit.
In the tuneless kit instructions they have you drill a hole in the TCC
accumulator circuit to limit the TCC converter regulator output.
You can skip that step and simply install the Sonnax "TCC apply limit
switch valve" and that limits converter charge to a max of 150 psi which is
sufficient for even the most radical performance applications.

On Thu, Oct 23, 2025 at 8:24 AM Dave Hristko via trnw2 <trnw2 at trnw.net>
wrote:

> Is the Tuneless kit compatible with this Sonnax kit ?
>
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> Dave Hritsko
>
> * Transmission Technical Services Manager*
>
>
>
> 800-654-1220 x 1186
>
>
>
> *From:* trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> *On Behalf Of *Tod
> Chretien via trnw2
> *Sent:* Thursday, October 23, 2025 10:17 AM
> *To:* trnw2 at trnw.net
> *Subject:* Re: TRNW-2: 68rfe Rev Max parts
>
>
>
> Thank you Mark!
>
> The shop I used to work for in Stockton just built a 68RFE with a tuneless
> kit and it came back with the input drum exploded. And the builder here at
> Ralphs (Rodney) won't use the tuneless kit because he claims he a had
> couple come back on him with broken components. I always figured they must
> have installed the kit in a tuned truck. However I just confirmed that the
> one they just built in Stockton only has 160 psi commanded line pressure in
> drive, so it's not tuned.
>
> Things that make you go Hmmmmmm...
>
> --
>
> Best Regards,
>
> Tod Chretien
>
> TRNW Inc.
>
> https://www.trnw.net
>
>
>
> On 10/23/2025 6:59 AM, Mark Puccinelli wrote:
>
> No pressure relief system built into the tuneless kits.
>
>
>
> On Thu, Oct 23, 2025 at 6:47 AM Tod Chretien via trnw2 <trnw2 at trnw.net>
> wrote:
>
> >* general consensus was sometimes those tuneless kits put out way more
> than the advertised 220 or so psi*
>
> Don't they have a pressure relief built into that tuneless kit? Maybe one
> of the Transgo guys can comment on this statement. Mark? Robert? Randy? You
> guys home? LOL
>
>
>
> --
>
> Best Regards,
>
> Tod Chretien
>
> TRNW Inc.
>
> https://www.trnw.net
>
>
>
> On 10/22/2025 12:40 PM, Steve Everett wrote:
>
>     I've used both of those numerous times, but a little over a year ago I
> had a unit come back that had been out a few months,  the accumulators had
> blown out of the vb, pulling the heads off a couple of the screws and
> bending the plate a good bit, I posted about it on the forum, and general
> consensus was sometimes those tuneless kits put out way more than the
> advertised 220 or so psi ?
>
>
>
>    I've probably got 12 or 15 68rfe's out there with my name on them using
> the tuneless kits,  that was the only one that caused a problem as far as I
> know ?   but I've been a little hesitant to use them since then
>
>
>
>    Steve
>
>
>
> On Wed, Oct 22, 2025 at 2:43 PM Tod Chretien via trnw2 <trnw2 at trnw.net>
> wrote:
>
> That seems over-kill if it's not tuned. I would use the Transgo Tuneless
> kit myself. They shift great with that kit. I also like that Transgo OD
> pressure plate that allows for an additional clutch.
>
> --
>
> Best Regards,
>
> Tod Chretien
>
> TRNW Inc.
>
> https://www.trnw.net
>
> On 10/22/2025 10:06 AM, Steve Everett wrote:
>
>   I've seen the channel plate used in a couple shops I was at, by the
> other builder,  I've used the seperator plate on a lot of builds, even
> stock builds,  we've got a customer from out of town, broke down here, and
> he wants an upgraded rebuild, we're pricing him a Rev max drum, which comes
> already built ?  I didn't know that until I priced it, a billet input shaft
> and that valvebody kit,  the truck isn't tuned, totally stock, we are
> pricing in a billet converter of course,
>
>
>
>   Steve
>
>
>
> On Wed, Oct 22, 2025 at 12:59 PM Tod Chretien via trnw2 <trnw2 at trnw.net>
> wrote:
>
> I have used the separator plate and the channel plate but not their
> accumulators. The channel plate is needed on anything with a tune.
>
> --
> Best Regards,
> Tod Chretien
> TRNW Inc.
> https://www.trnw.net
>
>
>
> On 10/22/2025 8:30 AM, Steve Everett via trnw2 wrote:
> >    I have not used any of Rev Max's parts for these other than the
> > bonded seperator plate,  has anyone used their 68rfe-347 valve body
> > foundation build kit ?  comes with channel plate, seperator plate and
> > billet accumulators,
> >
> > Steve
> >
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>
> --
>
> *[image: Image removed by sender.]*
>
> *Mark Puccinelli*
>
> *Product Support Technician*
>
> *TransGo*
>
> *mark.puccinelli at transgo.com <mark.puccinelli at transgo.com>*
>
>
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>
> *Adjunct Driveline Professor*
>
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> *puccinellim at smcc <puccinellim at smccd.edu>d.edu <http://d.edu>*
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> Visit me on Facebook:
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> --
>
> Best Regards,
>
> Tod Chretien
>
> TRNW Inc.
>
> https://www.trnw.net
>
> This message was sent from the TRNW Technical Discussion Forum (trnw2).
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