well i finally tuned one this past weekend and the transmission is awesome hardly any rpm drop,, has anyone else tuned one ?? P.S. it only has 600 miles lol 2016 8 speed.jpg
well i finally tuned one this past weekend and the transmission is awesome hardly any rpm drop,, has anyone else tuned one ?? P.S. it only has 600 miles lol 2016 8 speed.jpg
Josh Performance Tuning (956)784-0059
https://www.facebook.com/joshperformancetuning
well, yeah....
i was just wondering if anybody else had done oneOriginally Posted by Higgs Boson
Josh Performance Tuning (956)784-0059
https://www.facebook.com/joshperformancetuning
no but i got a 427 whipple 2015 denali 8 speed that will not start after the 15 tune flash makes for a 115k door stop, less then 300 miles
Last edited by 69camaro5speedefi; 01-25-2016 at 11:38 PM.
Yea, tuned a handful of denali's, the 6.2L is a beast.
Even got rid of the injector cut during a shift at wot
dam 8 speed transmission, lets see how much power they'll hold lol im still learning 6 speed cant imagine an 8 speed
Dammm still no luck on turning it on ?
Josh Performance Tuning (956)784-0059
https://www.facebook.com/joshperformancetuning
Nice they are awesome gotta learn the 8 speed more wish there was more tables to mess with
Josh Performance Tuning (956)784-0059
https://www.facebook.com/joshperformancetuning
Had luck first 14 times i flashed it, dead now, has a tcm code now even with stock tune,I have tryed unhooking battery 5 or 6 times,probly 20 combinations of things,weird it flashes or says it's flashing tcm but act like it's not talking to it on the buss line
so you have a 427 whipple in your 2015 denali and no go? that sux!
what's going on with it?
Will not crank
Are you flashing ecm and tcm at the same time or separate?
I flash separate as I've had issues on the 5th generation vehicles when flashed together.
send me a pm when you're ready, i'll try to help out.
I recently purchased a 2018 GMC Sierra 5.3L/8 Speed trans. Thought I would get used to the extra 4 gears, but I don't like how it shifts. Should down shift sooner, stay in a gear a little longer, etc. Did you do this tune for a customer or yourself? Do you/they like it better now?
I spent a lot of time getting my A8 in my 2017 6.2 Silverado to shift the way I want when I want. This trans is sweet once dialed in to personal specs.
I have a 6.2 with the 8-speed. Would you mind attaching your tune? I would like to compare it with mine to see if I learn anything.
Thanks.
2016 GMC Sierra 1500 6.2L
can you help me with mine...I cant get the first couple shifts to be soft..they slam into gear and lunge the truck forward,,
I took the pressures away in all low torque shifts..But still more firm than I want.. and I don't know what other tables to change..plus I still get the hard clunk going into 2nd with almost no load or slight decal..
did you have the trans built, i had my caddy trans built and according to the builder, the wave plates were removed.
this causes a very hard shift.
i can't get 1-2 to soften up either, but rather it shift firm instead of not enough pressure.
if your trans is not built there's no reason why a stock tune won't shift normal unless it's been modified or "built".
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