Help please 2-3 shift problem
Help please 2-3 shift problem Has anyone found a fix for the 2-3 shift banging the rev limiter at WOT threw tunning. I have adjusted so much stuff I dont know what is what anymore. I have had three tranny shops tell me it must be tunning. and the gm scan tool is not showing a commanded shift.
02 z28 4L60e
3000 stall
procharger
3.73 gears
02 z28 4L60e
3000 stall
procharger
3.73 gears
Last edited by STALL UP; Aug 10, 2006 at 02:27 PM.
Originally Posted by joecar
Bring the both WOT RPM and WOT MPH down until you start getting the 2-3 shift.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Ok, you'll have to try an experiement...
Set WOT RPM to 5500 or even 5000 and see if it shifts, taking note of the MPH and RPM.
Might want to check this first:
make sure the WOT downshift MPH is below the WOT upshift MPH (say 10 below);
if it's not, then it will block the WOT upshift.
Also: have you set the gear ratio so that VSS is computed correctly...?
What tune package are you using, you might want to ask them about this.
Set WOT RPM to 5500 or even 5000 and see if it shifts, taking note of the MPH and RPM.
Might want to check this first:
make sure the WOT downshift MPH is below the WOT upshift MPH (say 10 below);
if it's not, then it will block the WOT upshift.
Also: have you set the gear ratio so that VSS is computed correctly...?
What tune package are you using, you might want to ask them about this.
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Originally Posted by joecar
Ok, you'll have to try an experiement...
Set WOT RPM to 5500 or even 5000 and see if it shifts, taking note of the MPH and RPM.
Might want to check this first:
make sure the WOT downshift MPH is below the WOT upshift MPH (say 10 below);
if it's not, then it will block the WOT upshift.
Also: have you set the gear ratio so that VSS is computed correctly...?
What tune package are you using, you might want to ask them about this.
Set WOT RPM to 5500 or even 5000 and see if it shifts, taking note of the MPH and RPM.
Might want to check this first:
make sure the WOT downshift MPH is below the WOT upshift MPH (say 10 below);
if it's not, then it will block the WOT upshift.
Also: have you set the gear ratio so that VSS is computed correctly...?
What tune package are you using, you might want to ask them about this.
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Originally Posted by wait4me
try moving the Wot Tps enable percentage down lower.
The question i was asking about was VOLTAGE not actual pcm percentage.
Does the car shift if you only bring tps to 95%
The question i was asking about was VOLTAGE not actual pcm percentage.
Does the car shift if you only bring tps to 95%