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Re: 5l40e
Posted: Tue Jan 25, 2011 9:45 am
by gurov
i will test this in the next few days.
do you know if the auto trans is supposed to take longer to shift with higher load going to the trans ? cause mine takes a while to actually complete the shift, any idea ? perhaps i need to experiment with timing retard during shift, unfortunately i never got to test that before they rolled 1.0 ms3 out.
Re: 5l40e
Posted: Tue Jan 25, 2011 2:25 pm
by gurov
Lance wrote:Actually, after thinking about this for a little, I think the table works a bit differently.
In your example, the 3-4 shift will be at 50 mph, AND the 4-3 downshift will also be at 50 mph. What the code does is look for the current bin using the current speed (and load, of course), and the 40 mph (or kph) column represents speeds from 40 to 49.9 (i.e, the next highest value that isn't covered in the next column), and the 50 is from 50 to 54.9, etc. So when you drop below 50.0 mph, you drop to the 40 column, and the target gear becomes 3.
When you are shifting to neutral, are you doing this with the shift lever (i.e. the "inputs") or are you trying using the paddle shifts? It won't shift from the forward gears using the paddle shift buttons. But it should do this using the shift lever. However, the code doesn't distinguish between Park and neutral, so that might be causing some issues in your case (and this can be fixed, of course).
coming back to this, because it's making my brain explode:
so the table would be better viewed like this:
Re: 5l40e
Posted: Tue Jan 25, 2011 3:57 pm
by gurov
also, does does the TCC unlock during shifts ?
i'm seeing various docs saying it's sometimes safe to leave TCC locked during upshift under light loads. but it should be unlocked during a downshift.
Re: 5l40e
Posted: Tue Jan 25, 2011 5:41 pm
by Bernard Fife
gurov,
The code unlocks the TCC on downshifts, UNLESS the jake brake function is active, OR the full-time lock up is enabled and active (engine rpm greater than stall speed and gear above a user setting).
It's not unsafe to keep the TCC locked on downshifts, but it can cause harsher downshifts if the engine rpm is low.
Lance.
Re: 5l40e
Posted: Sat Jan 29, 2011 10:23 pm
by gurov
configuring pickup of VSS over can for MS3:
i'm not sure where that 45% scaler value is coming from. i had to set that in order to get close MPH in megashift vs MS3.
outputchannels section just has 0.100 for the speedo scaler.
ideas ? (and i will post this on ms3 forum as well)
Re: 5l40e
Posted: Thu Jul 14, 2011 3:18 am
by gurov
i'm back to driving the BMW, after letting it sit for some period of time due to being lazy to fix the brakes. Now that they are fixed, i'm going to get back into upgrading the gpio box with new code.
just wondering if you ever had any more ideas on how to fix the bugs i was experiencing ?
Re: 5l40e
Posted: Thu Jul 14, 2011 8:29 am
by Bernard Fife
gurov,
What bugs were you experiencing? As far as I can tell, the code works as expected.
The latest release code is here:
http://www.msgpio.com/manuals/mshift/V2code.html
The latest beta code is here:
http://www.msgpio.com/manuals/mshift/V4code.html The beta code has everything the release code has, plus you can set the TCC lock/unlock on all up/downshifts and you can set the maximum line pressure for each up/downshift.
Lance.
Re: 5l40e
Posted: Thu Jul 14, 2011 11:55 am
by gurov
i was having issues with the shifter not picking up the position after putting it into drive. not sure if you remember the back and forth on that. i will try out new beta code next time i drive.
Re: 5l40e
Posted: Thu Jul 14, 2011 12:08 pm
by Bernard Fife
gurov,
Yeah, I see the thread from back in April. I believe the issue was that you had set the start up mode to manual, and then the trans had no idea what to do coming out of PNR. As we discussed then, the solution is to not use manual as the startup mode. Newer codes won't let you set the startup mode to manual, in any case. So try the latest code, it should fix things. If not, post an msq and datalog and we'll have another look.
Lance.