TRNW-2: Chevy Active Fuel Management Killing 6L80's?

[Steve Everett]

    From my experience  the 4-5-6 clutches are burnt as a result of the
customer continuing to drive the vehicle for a good while after it starts
shuddering,  the filter stops up at least partially and the 4-5-6's are
starved for fluid after that until the filter stops most of the way up and
they burn.

   An afm system that is failing, whether due to lifters partially
collapsing or cam wear can be misdiagnosed as a tcc shudder,  I have run
into that a couple times myself

   Steve

On Wed, Jun 18, 2025 at 7:23 AM Brett Karulak via trnw2 <trnw2 at trnw.net>
wrote:

>
> Sorry, missed the part about you having failures.  I haven't seen the afm
> system cause transmission failures, I would be looking more at bad parts or
> missing something in the hydraulic circuits in the transmission.  Use a
> billet lid tc and minimum the sonnax zip kit or have the reamers needed for
> tcc.
>
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