I heard that the reason the shifts were intentionally softened was because the 4l60E had a habit of puking its guts when they put it behind the 6.0L. Sounds like the dealer was giving me a load of crap.
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Originally Posted by Slowprocess
If it makes you feel any better, I'm shifting out the 6.0L at around 6400rpms. Only reason I'm not going up to 6500 is because I'm already maxing out the stock injectors, so I'm holding their until I get the 43lbers. The 4l60e will last alot longer with the firmness on. My first tranny lasted 126,000 with the firmness on, and it was still chirping second when I sent it in for the core charge. The only time the 4l60e starts to have real problems is when torque management is removed without a shift kit or at least a corvette servo. You should ride in a truck with 0% torque management sometime. It feels like an entirely different truck between shifts.
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