TRNW-2: 68rfe Rev Max parts

[Dave Hristko]

[cid:image001.png at 01DC4407.24D37550]
Is the Tuneless kit compatible with this Sonnax kit ?




Dave Hritsko
 Transmission Technical Services Manager
[cid:image002.jpg at 01DC4407.24D37550]

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<mailto: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<mailto: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<mailto: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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Mark Puccinelli
Product Support Technician
TransGo
mark.puccinelli at transgo.com<mailto:mark.puccinelli at transgo.com>


Adjunct Driveline Professor
Skyline College
San Bruno,CA
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--

Best Regards,

Tod Chretien

TRNW Inc.

https://www.trnw.net
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