Hey there,
Ive got a 2010 Camaro SS with the L99 and 6l80e. Ive been battling this weird 2nd gear hangup at 5500rpm for awhile and I cant seem to figure out what it is. Every other gear is fine. Any help would be much appreciated.
Hey there,
Ive got a 2010 Camaro SS with the L99 and 6l80e. Ive been battling this weird 2nd gear hangup at 5500rpm for awhile and I cant seem to figure out what it is. Every other gear is fine. Any help would be much appreciated.
add tcc pressure and trans input shaft, and trans slip rpm to your logs maybe something will stick out
Here is a log with the PIDS you asked for. It didnt do it quite as bad this log which is weird. Sometimes it barely hangs and sometimes it holds like in the first log.
If you look closely you have a bit of trans slip while it's happening in that log. Be curious if it's the same on longer events like this.Originally Posted by SRTRhino
At first glance it looks like the trans may be slipping and allowing rpm to climb to 53-55 as opposed to something happening at 55.
Last edited by sevinn; 09-25-2021 at 02:53 AM.
There's a lot of channels (PIDs) you need to add. It's not logging current gear, so any input would just be a guess. Some to definitely add will be...
Burst Knock Retard
Total Knock Retard
Accelerator Position
Relative Throttle Position
Commanded Throttle Position
TCS Desired Engine Torque
Engine Torque
Torque Mgt Advance
Throttle Control Source
Trans Engine Torque
Trans Torque Management Type
Trans Speed Control Torque
PRNDL Status
Trans Shift Mode
Oncoming Clutch
Trans Current Gear
Time of Latest Shift
Time of Latest 1-2 Shift
Time of Latest 2-3 Shift
Time of Latest 3-4 Shift
Time of Latest 4-5 Shift
Fill Pressure Cmd
PCS 1 Cmd Pressure
PCS 2 Cmd Pressure
PCS 3 Cmd Pressure
PCS 4 Cmd Pressure
PCS 5 Cmd Pressure
Add those, and drive/log again. That should start to get us somewhere
Okay, I will make sure to add those to the next log and upload it here, thanks guys!
Heres a log with all the needed PIDS added. Thanks for the help again from all of you!
Trans slips spikes again around 4600 rpm to 5200 rpm, then trans slip stops. Your trans seems to be slipping.
any idea what could he causing it? I would think if the fluid it low it would happen more often and not just in 2nd at WOT
Nothing crazy goes on with your pressures or anything. You may honestly want to drop fluid and see what it looks like.
After you've done what sevinn said and flushing the fluid if it looks bad, grab the airmass A table and raise it 30% for a band aid test.
Where would this table be located? Im not familiar with that name of a table for the trans
It's on the engine side. You can also increase EQ ratio tq at EQ ratios you reach at wot as well to the same effect. Engine > torque model > general
Okay, Ill give it a shot. Just out of curiosity, what exactly will this be changing? Never really understood how changing the torque models affected anything.
Increasing the values in those tables (don't need to do both really) increases reported torque to the trans, therefore increasing requested line pressure.
so going over this file theres quite a bit that i can see is wrong with it. First thing, where it is set as a minimum of -20 degrees in the spark minimum table for the torque managment, setting that to a positive 5 degrees is only causing more harm than it is good. If it needs to remove to -20 then allow it, thats the trans telling you something isnt set correctly and the shift isnt executing properly. Second, after going over the trans portion, theres so much copy/paste, as well as extreme pressure adjustments that simply are causing much more harm than good. You would literally be way way better off if you start back from a stock file and make ONLY THE ADJUSTMENTS YOU UNDERSTAND AND THE VEHICLE NEEDS. That seems to be where most make mistakes on these transmissions, altering tables that they arent certain of the actual function/ consequence. in the last log if you use the layout ill include, you can see where its droping the 2/6 clutch too late and the 3/5/R was already applied causing that odd feeling, that is actually both clutch packs being drug/applied at the same time instead of dropping and applying at the proper ratio. Hope this helps.6l8090.Layout.xml
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