Is VSS show correct values...?
Set WOT 1->2 RPM to 4800 rpm, and inch it up from there.
Post tune file so I can look at shift tables.
On those pids, go rightclick->More Info and see what other pids they mention... select those also (post screenshots).
You'll have to show me about this screen shot stuff first lol. VSS values seem to be correct but I haven't confirmed that with GPS or anything. I can def change to 4800 and go from there though. I was trying to see if it was commanding the shift but possibly wasn't sending enough pressure to engage the shift at that high of rpm.
I'll have to get my hands on a hand held GPS but I was following another vehicle that the cruise was set at 60mph and my speedometer was showing 64 to keep up. My gear ratio is set correctly to 3.90 and my tire size and OD is set correctly as well. Also I adjusted my shift points to 5000 1-2 which it was still hitting the rev limiter at 6700 and also 2-3 is hitting the limiter but I didn't bring that one down yet. I'll prob set it to 5500ish and try that when I get more time. I'd really like to rule out anything possibly wrong with the tranny also. I can't manually hold 1st gear anymore which I thought you helped me fix but obviously it's still not. Also if I hold first until 4k or so rpm and hit wot and shift manually to 2nd immediately to let the pcm shift, it will sit on the rev limiter until I let off then act like it's in Neutral and just free rev until I coast for a few seconds then it grabs second and goes. But 2nd gear doesn't slip. It's the weirdest thing. Log files and current tune posted for you to take a look.
Hitting the limiter so easily is a symptom of slippage...
what does the ATF look/smell like, this will tell you more.
Try setting D0913 and D0914 to 255 mph.
ATF looks cherry. The whole trans is fresh and doesn't even have but maybe 100 miles on it. I just finished the 4l80 swap so I sure hope it isn't slipping that easily, I'm only putting about 420hp to the wheels last time I dyno'd. Might be a tiny bit more now with new headers.
Install a pressure gauge on the line tap on the side of the trans, observe the gauge as you drive.
In the meantime, let me further look at your shift tables.
That sounds like it'll be my next step. Thanks Joe
Drop these pids:
GM.GEARCURR
GM.GEARCOM
GM.SHIFT12
GM.SHIFT23
Add these pids:
GM.SHIFTLAST
GM.TCCMODE
GM.TCCSLIP
Keep GM.GEAR and GM.TFMPRS and the others...
you can drop SAE.FUELSYS
0. D1206 should be set to 95%, and D1207 to 85%.
1. Set tables D0960,1,2 "Throttle Kickdown" to 100% everywhere.
2. Un-cross the Part Throttle Upshift/Downshift tables (they are not allowed to cross), see attached pic...
simply: move 3->2 above 1->2, and move 4->3above 2->3.
3. Copy the WOT MPH shift points from the 100% cells in the PT Upshift/Downshift tables
->( make sure that none of the upshift MPH's cause redline/limiter RPM to be exceeded )
4. Set WOT RPM shift points to 4500 rpm.
Also:
a. some of the standing pressure tables can be edited.
b. the pressure shift tables can be extended up to 96 psi.
Posting Permissions
Reply With Quote