TCC not locking up properly

[Rob01ss]

I have an 04 Silverado with a 6.0 4l60e Trans with a 3200 circle D convertor and 3:42 gears
The motor has a cam (236-242/580-590 on a 112 long tube headers off road y w flowmaster outlaws
comp 918 springs and hardened pushrods.
The truck runs pretty good no dtc's showing but when I am on the highway the TCC takes several minutes to lock up but will not stay locked up it will unlock randomly I can scan it and lock it with hp tuners and it drives like it is supposed to.
I was gonna try and do a drive log but it has been raining all day but I will post my tune and when it dries up I will post a log for yall to check out Thanks in advance

I have a powerdyne supercharger with a 8 lbs pulley that I want to install but I want to get the bugs worked out

(new tune log.hplmy truck new tune.hpt

[jimmyblue]

Add "TCC Mode" to your next scan session and look at
what it says in the table view when you think it should
be locked, but isn't. Table view, because you can't plot
or histo it on account of it's displayed as non-numeric
data (why? hint, hint, dev team).

If you see "--3--" then misfire detects are inhibiting lockup.
Look at the various Misfire Current Cylinder PIDs for any
that seem to stand out "above the noise", for something
that deserves attention - if they all just rattle around,
onesy-threesy and sometimes go to zero on the cylinder,
that's normal-ish and nothing to do but live with it. But
if you have one that's a flagpole then chase it - you do
not want, say, the semi-silted #8 injector to give you a
holed piston when you put the blower on.

This is pretty common with lightweight converter or cam,
you have both. Try doubling the values in the various
misfire xxx mode tables if you want to keep some basic
detection capability, or just jam them all to 32767 and
forget misfires.

[Rob01ss]

ok cool will do that on the way to work I drove it today and it did pretty good on first start up it runs real good throttle response is great after it runs a bit it is not so good kinda blubbers when you give it throttle at first it does lock the convertor just takes a few minutes which is strange

[madmann26]

Add "TCC Mode" to your next scan session and look at
what it says in the table view when you think it should
be locked, but isn't. Table view, because you can't plot
or histo it on account of it's displayed as non-numeric
data (why? hint, hint, dev team).

If you see "--3--" then misfire detects are inhibiting lockup.
Look at the various Misfire Current Cylinder PIDs for any
that seem to stand out "above the noise", for something
that deserves attention - if they all just rattle around,
onesy-threesy and sometimes go to zero on the cylinder,
that's normal-ish and nothing to do but live with it. But
if you have one that's a flagpole then chase it - you do
not want, say, the semi-silted #8 injector to give you a
holed piston when you put the blower on.

This is pretty common with lightweight converter or cam,
you have both. Try doubling the values in the various
misfire xxx mode tables if you want to keep some basic
detection capability, or just jam them all to 32767 and
forget misfires.

I'd listen to jimmy.

BTW jimmy,


Thanks for the work you did with the spreadsheet and the 4l60's (from ls1tech). I used it to tweak my trucks FMC and pressure settings and holy jeebus, what a difference.

[POWERZONE]

Jimmyblue has made some great suggestions and I would do as he stated. I would really be interested in seeing the log too.

But also looking at your tune, you might want to re-examine your 3>4 mph shift points vs 4th gear apply and release. I usually tune out 3rd gear TCC apply on most high performance tunes. Also some of your 4th gear TCC release MPHs are really close to typical HWY speeds.

[Rob01ss]

I have looked through the tune and I don't see what your talking about but it has been a long week I will look at it again this weekend after I rest and can focus more