4L85E Supermatic
Thread Starter
Joined: Oct 2016
Posts: 1,584
Likes: 374
From: Armstrong BC
4L85E Supermatic Hey guys I'm cross posting this from 3rd gen site he's looking for some help with this and definitely won't get it there as most users hardly know what a 4L80e is
got a 4L85E with supermatic controller. from chevrolet performance. but got issue with wire to sport button. can anyone tell me what color wire goes to switch? so I can feed new wire from multiplug rather than stripping down wiring to find join and A/B label (all neatly tucked away) thanks
Wiring diagram attached too
got a 4L85E with supermatic controller. from chevrolet performance. but got issue with wire to sport button. can anyone tell me what color wire goes to switch? so I can feed new wire from multiplug rather than stripping down wiring to find join and A/B label (all neatly tucked away) thanks
Wiring diagram attached too
TECH Enthusiast
Joined: Jan 2019
Posts: 677
Likes: 490
From: Roxana, IL
Hey guys I'm cross posting this from 3rd gen site he's looking for some help with this and definitely won't get it there as most users hardly know what a 4L80e is
got a 4L85E with supermatic controller. from chevrolet performance. but got issue with wire to sport button. can anyone tell me what color wire goes to switch? so I can feed new wire from multiplug rather than stripping down wiring to find join and A/B label (all neatly tucked away) thanks
Wiring diagram attached too
got a 4L85E with supermatic controller. from chevrolet performance. but got issue with wire to sport button. can anyone tell me what color wire goes to switch? so I can feed new wire from multiplug rather than stripping down wiring to find join and A/B label (all neatly tucked away) thanks
Wiring diagram attached too
I studied the diagrams for a while and do not see anything that would trigger a sport mode. In the trucks with tow/haul it is a momentary on switch that actually grounds a specific pin on the PCM. I saw no such pin on the wiring diagram.
In the instruction sheet for the wiring on pg. 3 item 3 it states:
"You are ready to cruise – Most applications will be able to use the preprogrammed calibrations
without any modifications. Your Transmission Control Unit comes preprogrammed with a "Street"
calibration and a "Performance" calibration. The "Performance" calibration must be accessed using
the A/B selector switch (B calibration) by grounding the A/B selector wire. Removing the ground
from this wire switches the controller back to the "Street" calibration."
So it sounds as if you need to find the A/B selector switch. It also states the the enclosed C/D has more information on page 2
"The Transmission Control Harness provides for optional connections for RPM, speedometer and oil pressure electronic gauge
connections. They are not required to be used for transmission operation. The Transmission Control harness also has provisions
for (see the enclosed CD for more details on how to wire-up these features):
• Brake light switch activated Torque Converter unlock
• Overdrive cancellation
• A/B calibration switch – allows a second calibration to be activated
• Dyno mode – allows transmission to be "locked" in gear for chassis dyno testing"
Thread Starter
Joined: Oct 2016
Posts: 1,584
Likes: 374
From: Armstrong BC
I think the key/answer to your question is on the C/D...
I studied the diagrams for a while and do not see anything that would trigger a sport mode. In the trucks with tow/haul it is a momentary on switch that actually grounds a specific pin on the PCM. I saw no such pin on the wiring diagram.
In the instruction sheet for the wiring on pg. 3 item 3 it states:
"You are ready to cruise – Most applications will be able to use the preprogrammed calibrations
without any modifications. Your Transmission Control Unit comes preprogrammed with a "Street"
calibration and a "Performance" calibration. The "Performance" calibration must be accessed using
the A/B selector switch (B calibration) by grounding the A/B selector wire. Removing the ground
from this wire switches the controller back to the "Street" calibration."
So it sounds as if you need to find the A/B selector switch. It also states the the enclosed C/D has more information on page 2
"The Transmission Control Harness provides for optional connections for RPM, speedometer and oil pressure electronic gauge
connections. They are not required to be used for transmission operation. The Transmission Control harness also has provisions
for (see the enclosed CD for more details on how to wire-up these features):
• Brake light switch activated Torque Converter unlock
• Overdrive cancellation
• A/B calibration switch – allows a second calibration to be activated
• Dyno mode – allows transmission to be "locked" in gear for chassis dyno testing"
I studied the diagrams for a while and do not see anything that would trigger a sport mode. In the trucks with tow/haul it is a momentary on switch that actually grounds a specific pin on the PCM. I saw no such pin on the wiring diagram.
In the instruction sheet for the wiring on pg. 3 item 3 it states:
"You are ready to cruise – Most applications will be able to use the preprogrammed calibrations
without any modifications. Your Transmission Control Unit comes preprogrammed with a "Street"
calibration and a "Performance" calibration. The "Performance" calibration must be accessed using
the A/B selector switch (B calibration) by grounding the A/B selector wire. Removing the ground
from this wire switches the controller back to the "Street" calibration."
So it sounds as if you need to find the A/B selector switch. It also states the the enclosed C/D has more information on page 2
"The Transmission Control Harness provides for optional connections for RPM, speedometer and oil pressure electronic gauge
connections. They are not required to be used for transmission operation. The Transmission Control harness also has provisions
for (see the enclosed CD for more details on how to wire-up these features):
• Brake light switch activated Torque Converter unlock
• Overdrive cancellation
• A/B calibration switch – allows a second calibration to be activated
• Dyno mode – allows transmission to be "locked" in gear for chassis dyno testing"
