JoeP1450
New Member
Sorry if I'm duplicating another thread,,, but I'm not seeing an issue similar to mine.
I have 2006 SILVERADO 6.0 gas, 4L80, 207,000 miles, 2nd owner. The truck shifts exactly as it should when start up cold. However,,, once truck gets up to operating temperature, it shifts "BANG" extremely hard!! All gears. Just like an old Turbo 350/400 with vacuum line off the modulator.
If I let off gas when it's time for shift (to let it shift soft/normal) it shifts even harder. If I am gassin on it kind of hard when shifting, it "seems" softer,,,, but of course it's still shifting hard.
Fluid level is good, fluid appearance is good, no burnt smell, I've drove truck about 30,000 miles and have not serviced trans. The only mod to the truck is SUPERCHIPS FlashPaq,,,, that is in 93 octane (I think that's what it's called) tune. I've put about 3500-4000 miles on it with the tuner on it.
I have 2006 SILVERADO 6.0 gas, 4L80, 207,000 miles, 2nd owner. The truck shifts exactly as it should when start up cold. However,,, once truck gets up to operating temperature, it shifts "BANG" extremely hard!! All gears. Just like an old Turbo 350/400 with vacuum line off the modulator.
If I let off gas when it's time for shift (to let it shift soft/normal) it shifts even harder. If I am gassin on it kind of hard when shifting, it "seems" softer,,,, but of course it's still shifting hard.
Fluid level is good, fluid appearance is good, no burnt smell, I've drove truck about 30,000 miles and have not serviced trans. The only mod to the truck is SUPERCHIPS FlashPaq,,,, that is in 93 octane (I think that's what it's called) tune. I've put about 3500-4000 miles on it with the tuner on it.