What is the difference in having the min/max at 99/100 as opposed to 80/90 duty cycles? Which make the converter hold tighter? Does having it at 99/100 make the lockup feel much firmer? And, what are the stock settings?

 

I think that instead of locking progressively it locks quick and solid. dunno for sure tho.
I have mine set 99/100 or 90/100 can't remember.

 

That's kind of what I thought, lower settings allow some slip as it engages? I'm trying to figure out what to tell Nelson I want so the damn converter will stop locking&unlocking with lite cruising.

 

locking/unlocking is done entirely by the TCC apply/release tables. Duty cycle basically means for any given time, it will be "on" for some value between the max and min. If max is 100 and min is 99, then on average it will be on for 99.5. This has the effect of making the converter lock up very quickly and firmly. My PI triple disc locks up much harder than my truck shifts. The stock calibration is very mild and allows lots of slip (and heat) for a smooth gentle lockup.

 

Statement in red confuses me a bit. What will be on for 99.5? Is this number a timer? What unit is this number referring to? Obviously not seconds, but something else right? Please explain in english for those of us that don't know crap about tuning, including me.

 

Its the duty cycle rating. Often times on air compressors or welders you will see something like 100% at 50 amps, 65% at 75amps, 30% at 150amps, etc. That means the welder can run for 30% of 30 minutes at 150amps continuously before it needs to cool off, whereas at 50amps you can run it continuously all day long (in theory) without it overheating.

When I say on average is 99.5, that means for any given time the TCC solenoid is engaged 99.5% of the time; seconds, minutes, hours, whatever.

 

If you want it to quit locking and unlocking, make sure you're not getting any missfire codes or any check engine codes actually. If there are no problems there, ask nelson what he has your 4th gear lockup/unlock MPH settings at. I have mine set to lock at 38 and unlock at ~33mph, but those speeds are dependent on what rear end gear you have and what size tire.

Also, another place to look would be in the converter lockup TPS% settings, and see how much throttle % it needs to meet to unlock the converter. If he has it set where it unlocks past 25% tps, then it will cause the converter to unlock and then relock once you go back below that %. Also, the converter will unlock when you let off the gas on the highway to help the motor coast.

 

I was going to ask him to put my apply/release speeds at 37/33 in 4th for the first 4 cells in the TPS lockup speeds (0-18.75% throttle). And whatever would seem alright for 3rd, maybe 34/30? The higher speeds/TPS seem OK. Besides this is where alot of my driving is, lugging around to work. I was planning on also having him put my duty cycles at 90/80 max/min to keep the converter locked. I have 30.5 tires with 3.42's. I think this will help me?