How does it shift (soft, medium, firm, hard)...?Originally Posted by zomeizter
Can you post your tune file...?
How does it shift (soft, medium, firm, hard)...?
Can you post your tune file...?
Shifts are soft, like the stock configuration, seems like the tune does exactly nothing when I flash. BTW, I used V7.5 when I flashed and I proceeded to adjust base pressure to a 10% increase, shift times set to 0.2500, and torque management reduced by 50% and later 70%. Every single time I tweaked the parameters and reflashed it seemed as if nothing changed. Maybe I need to tune with V8 instead of V7.5? I left my other laptop at work with all my tune files and can't post it at the moment, will do so as soon as I pick it up.
The Guinea pig is a 2005 Chevy Suburban, 5.3L 4L60E 4WD, completely stock...for now
V7 or V8 should not make any difference in editing.
There are other considerations:
to get a firm 1->2 shift you need the Corvette 2nd servo or the Sonnax 2nd Super Hold servo, and the wider 2nd band;
you have to make sure the 3-4 clutch is not slipping;
you have to make sure line pressure is good (the pressure regulator has not worn its bore);
do you have a stall converter...?
what state is the trans fluid (color/smell/level)...?
Do you do a cal-only flash or a full flash...?
Did it flash successfully...?
After flashing, if you read back the tune from the PCM, does it compare to what you flashed in...?
Excuse my lag, left the country briefly...
Tranny is full stock but maintained well, fluid is great, cherry red and smells like ATF, half a pint over filled. Cal-only flash was performed, cluster information center reads successful flash, have not verified by extracting afterward, will do very soon and report result. I was under the impression I could firm up the up shifts with Cal adjustment only but I guess I'm mistaken, if so I reckon I shall abandon further tweaking of this vehicle until hard parts go in the slush box...good day.
If tweaking the tables doesn't increase firmness, then you have to find out why.
If removing Torque Reduction does not increase shift feel, then try increasing Shift Pressure tables a further 25%.
Post your tune file, if you can, let's take a closer look.
will do, work intensity is finally decreasing, standby ma man...
No worries, take your time.
I'm back, work has given me a break for once...where were we? Oh yes, so I will post the tune file as soon as I figure out how, and, I have a question: You mention hard parts in the tranny for shift firmness, do you recommend the corvette servo installation in the slush box? I've been researching this and there's a whole lot of happy gearheads out there with the results of this "mod", I'm very interested.
Test 1...
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