66tomcat

i have a 05 gto just boltons .
the car was running great (11.60 in the 1/4 mile )
i did a gear swap,to 3.91 gears.
now i cant get the converter to lock.

05 ls2 kooks headers , ported stock intake, 3600 stall, other drivetrain mods

i do have hp tuners . i did the gear swap (a complete rear swap)
with a harrop cover .

anyone have any ideas?

66tomcat

the original tune was just headers and a 2800 yank converter.
what has been added is the intake manifold and the bigger stall

69LT1Bird

iTrader: (1)

Post the tune file

66tomcat

i cant figure out how to post it , or even e mail it .
im just wanting to know what may be happening to cause it .

69LT1Bird

iTrader: (1)

Did you change the speedometer section in your tune for the gear ratio? Did you tell the system to auto scale the transmission tables?

66tomcat

i did the 3.91 gear ratio change , did not auto scale

69LT1Bird

iTrader: (1)

If you didn't auto scale, the shift points do not get moved automatically in relation to the new axle ratio or tire size change. It changes the shift MPH settings in a few tables. You may want to try that.

66tomcat

iin the trans tune part the tcc auto , was disabled .could that be it ?

66tomcat

ok re wrote the tune with auto scale and found the tcc auto .

69LT1Bird

iTrader: (1)

If you are talking about the Shift Lock, no. That keeps the torque converter locked during shifts. Not usually a good idea.

66tomcat

damn i was hoping that was it .
could the wheel speed sensors have anything to do with this ?

69LT1Bird

iTrader: (1)

There are a few things that can. Spark knock will keep the TCC from engaging, the MAF can mess with the trans shifts and pressure. I am sure a speed sensor will also do this.

66tomcat

the only thing that changed was the rear diff
the car was raced a month ago, ran great .
even had the converter locking at 100mph .

66tomcat

btw thanks for the help

02 BLK WS6

iTrader: (11)

Max out your misfire tables and see if it'll lock.

66tomcat

i have been getting a random misfire code , where is that ?
and i have been getting that code for a while ,when the motor is cold but only once in awhile .

69LT1Bird

iTrader: (1)

Engine Diagnostics | Misfire