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

Brett Karulak brettsb16a2 at gmail.com
Mon Nov 3 09:39:07 PST 2025


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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