Chevrolet Suburban 3500 Questions

[intheburbs]

I suspect it does because there is lots of slip in the shifts. It's built to be armored and carry around dignitaries who would likely be quite cross if a harsh shift caused them to spill their Scotch while fleeing enraged proletariat.

Late to the party here, on vacation the last two weeks...

I have no proof other than the facts/circumstances of my situation....I bought my 2008 in 2013 with 106k miles. Almost immediately I got a Blackbear tune, and among other things, they tuned out a whole bunch of Torque Management (aka making shifts smoother at the expense of durability of clutches). I am absolutely convinced that is one of the main reasons why my 6L90 is still functioning perfectly after 260k miles and a metric shit-ton of abuse.