a4 4l60e how to tune with new 3600 stall

[z28ls1818]

well my car is running a little better after the idle issues i was having.


anyway my car has a real hard 2nd to 3rd shift (real hard, the tranny builder even thinks it is locking up during the shift).


also when coming to a stop and it downshifts into 1 it is real annoying. the revs jump up when it downshifts to 1st coming to a stop.


does anyone know how to tune for a converter?

[LS1_Dragster]

I have my Yukon shifting pretty good with a 3000 and I used the same parameters with my firebirds 3500 stall. Take my tune and either copy every field over or possibly a segment swap.

Lee

[z28ls1818]

I have my Yukon shifting pretty good with a 3000 and I used the same parameters with my firebirds 3500 stall. Take my tune and either copy every field over or possibly a segment swap.

Lee

have you messed with the line pressures?

i was told not to mess with those.

[LS1_Dragster]

Yes and yes you can! Just dont get carried away. Just give it a shot to see if it gets you going the right direction.

[joecar]

The pressure tables are only effective during shifts.

Make sure your airmass/airflow is good (not calculating low) for non-shift in-gear pressure.

[z28ls1818]

The pressure tables are only effective during shifts.

Make sure your airmass/airflow is good (not calculating low) for non-shift in-gear pressure.

what do you mean? you like make sure rafig and rafpn are fine?

[joecar]

No, make sure VE and MAF are good, log dyncylair, dynair, and trqeng to make sure those are not going abnormally low (or high).

[z28ls1818]

I have my Yukon shifting pretty good with a 3000 and I used the same parameters with my firebirds 3500 stall. Take my tune and either copy every field over or possibly a segment swap.

Lee

i tried this and only seemed to make it worse. now it was making a weird clunking sound right before it downshifted and when it did down shift it made a similar sound. so i just changed it back to the original settings. ATTACHED IS A LOG

[LS1_Dragster]

I'm no expert, but maybe your problem is mechanical.. That tun is very easy going on the shifts and pressures and in no way should cause you adverse issues.

Your log doesn't help me much since what you logged is different then what I log so I cant compare. It did show that your converter is not locking up.

I think you have a wiring issue or something, it just doesn't look right when it increases the pressure on the downshift. Are you sure its a 4L60E?

Will you post your tun file also?

Lee

[z28ls1818]

I'm no expert, but maybe your problem is mechanical.. That tun is very easy going on the shifts and pressures and in no way should cause you adverse issues.

Your log doesn't help me much since what you logged is different then what I log so I cant compare. It did show that your converter is not locking up.




I think you have a wiring issue or something, it just doesn't look right when it increases the pressure on the downshift. Are you sure its a 4L60E?

Will you post your tun file also?

Lee

it could be. i didnt change the pressures. i was told not to by performabuilt http://www.performabuilt.com/ , acording to them the they have already manipulated the pressures and any pressure change in the tune isnt advisable.

The converter is basically brand new and so is the tranny.