i am trying this to see if it works, it's a pic of the KR i had..:D
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i am trying this to see if it works, it's a pic of the KR i had..:D
Joecar
My car is changing gears nicely now - but the 2-3 change at lower 1/3 Nm values is a bit clunky - what can i do about it? My LSD/diff is a bit worn i think as well so it might be a factor.
At high % its fine. But low down it is a little bit bangy rather than positive and quick like the 1-2 change.
I have no torque management set at all and remember i have a SS3600 converter
It seems the KR happens when the RPM drops after an upshift, and commanded AFR is 12.26; TR reduces spark timing momentarily on each upshift, so you may either want to add some back in, or see if the actual (wideband) AFR matches the commanded AFR, or play with the burst knock settings, or try higher octane fuel;Quote:
Originally Posted by ytry
What is happening is that the engine becomes loaded when it begins to pull in the new gear so it knocks;
can you hear it knocking...?
Your MAP is below 90 kPa at WOT, you must be at altitude (5000ft), right...?
Your HO2S voltages at WOT seem to be at 825-850mV (as best as I can tell) which is too lean;
opinion is that the HO2S voltages at WOT should be something like 930mV;
but the exact way to tell the actual AFR is by running a wideband O2S.
Flyer,Quote:
Originally Posted by Flyer
You mean at low throttle below 20 km/h in traffic, it clunks when going 1-2...?
I have tried decreasing the pressure and increasing the shifttime at the lowest 2 torque settings, but it didn't help;
I don't know that anything can be done.
At low speed/throttle the sprag is overruning, and when 1-2 occurs it grabs and the diff lets you hear the back-lash in the ring/pinion as a mild 'clunk'; happened since new, friends would say "I thought you bought a new car..."
My car is good in 1-2 to change - its the 2-3 change.
Oops, I misread 1-2 instead of 2-3...Quote:
Originally Posted by Flyer
It's still the forward sprag suddenly holding after freewheeling in 1st or 2nd;
the ring/pinion was coasting and now is suddenly driven (backlash is suddenly taken up);
if that's not describing what you see/hear, maybe 2-3 shift pressure is high and/or shift time is too quick for the lowest torque cell; have you tried adjusting these (only for the lowest torque cell)...?
Its at about 8% throttle at 2000rpm change 2 to 3rd at 74ftlb (100Nm)
which in my car has 86Kpa which is 13%. and shift time is set to 0.300
with 3.73s it only at about 23mph.
This is just one example of when it does it. It does it at higher revs as well.
Quote:
Originally Posted by Flyer
Hey this is exactly the same problem with me too. I am curious to hear a follow up on this one.
Mine is doing this fairly much exact same conditions as you Flyer. Its really annoying and feels bad IMO. Makes me cringe when it goes 'cuchunk'! and every other shift except 2-3 are positive and perfect no matter what the TPS% or torque is. I tried a few things but it still does not feel quite right however it is better. My box is built as well and running a 3500 stallie.
If its 'really' light throttle it is fine and drops a 2-3 shift firm or if it is 2400rpm or cops a boot it is beaut all the way through. Tried playing with the cells which indicate between 70-100nm by increasing the shift time a little.
Should I try increasing the shift times in the lower torque value cells some more and try it out? Have not got a log at the moment with me to post :(
interesting. :Eyecrazy:
I get a clunk going 2-3 at almost no throttle, around 20-25 mph, almost idle revs;
I have never yet been able to eliminate it, it's very annoying. :bash::nixweiss:
I'm curious to know how many people are seeing this.
Is there any way to adjust shift firmness during AutoVE tuning? My shifts are freakishly hard and jerky.