TRNW-2: 6T70 in a 14 Traverse HP Tune

[John Parmeter]

I use florida torque converters and im in new York
They build a real good product and marcin stands behind
His product.  Call him open a conversation guys solid
John centereach transmission

From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Steve Everett via trnw2 <trnw2 at trnw.net>
Date: Monday, November 3, 2025 at 12:43 PM
To: Brett Karulak <brettsb16a2 at gmail.com>, Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: 6T70 in a 14 Traverse HP Tune
  I haven't used Florida torque converter in a while,   but yes, you can tune the 6t70's ,  I've been doing it a while now,  maybe a couple years anyway,  I block out apply until 40mph in 4th gear,  they drive great after that,  it takes the majority of the strain off the converter clutch

  Steve

On Mon, Nov 3, 2025 at 12:39 PM Brett Karulak via trnw2 <trnw2 at trnw.net<mailto:trnw2 at trnw.net>> wrote:
Can we tune the 6Ts with HP?  I don't know if I'm the only person having issues with Florida TCs but this is now my 3rd shudder but first and only one I installed in a 6T70.  All my other 6Ts have pnh, and all of those are older than this one, as it was the last 6T70 i did.  This unit has 11000 miles on it.  You can feel the shudder only at low speeds and lower gears, not in 5th or 6th.  Fluid is perfect, no burn smell.  I vac test stuff, use the sonnax zippy, replace valve body pulse dampeners section with new oe, new bushing in stator tube and seal, but I do reuse the tehcms.  I am so far not trusting florida tcs.  And maybe all three of them have had bad tehcms but I have tuned the two 6Ls and they haven't been back.  Are any of you having good luck with florida and not tuning anything?  But main question is, can we tune these 6ts and if you have any advice on the tune but i guess it might be similar to the 6Ls.

Brett
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