Speedometer not reading after 4l80e swap
Thread Starter
Teching In
Joined: Jan 2017
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Speedometer not reading after 4l80e swap I’m about to pick up a 02 Trans Am that has a 4l80 swap but the speedometer is not hooked up. Car drives and shift perfectly fine but will not read the speed. It does read the RPMs but does not read the speed. How easy is this to fix and how can I fix it?
TECH Junkie
Joined: Jun 2008
Posts: 3,202
Likes: 1,390
From: Nitro Alley
Is the 4L80E from a Four Wheel Drive truck?
or this one. https://www.ictbillet.com/transmissi...7-lq4-5-3.html...
you need the rear speed sensor hooked up to ECM and tune updated for 4l80e... speed on 4l80e comes from rear sensor which 4l60e does not have.
you need the rear speed sensor hooked up to ECM and tune updated for 4l80e... speed on 4l80e comes from rear sensor which 4l60e does not have.
TECH Junkie
Joined: Jun 2008
Posts: 3,202
Likes: 1,390
From: Nitro Alley
If the Transmission is installed and working... I would not spend $100 or more on a conversion jumper-harness.
Being that you have a 4L80E from a Two Wheel Dive vehicle; there should be a reluctor installed for the Output-Speed Sensor.
That conversion jumper-harness is mainly for the Input-Speed Sensor, and that is not going to help you for a Speedometer.
O, and Two Wheel Drive 4L60E Transmissions do have a "rear sensor", it is referred to as the Vehicle-Speed Sensor (VSS for the Speedometer).
Give us some information regarding the Speedometer:
-Are you using the stock IPC (Instrument Panel Cluster)/ Speedometer?
-Have you altered the stock wiring for the IPC/ Speedometer?
-Is the original VSS Electrical Connector still under the Vehicle?
-If so... Have you connected the original VSS Electrical Connector to the 4L80E Output-Speed Sensor?
-What did you have done in terms of programming for the 4L80E swap?
Being that you have a 4L80E from a Two Wheel Dive vehicle; there should be a reluctor installed for the Output-Speed Sensor.
That conversion jumper-harness is mainly for the Input-Speed Sensor, and that is not going to help you for a Speedometer.
O, and Two Wheel Drive 4L60E Transmissions do have a "rear sensor", it is referred to as the Vehicle-Speed Sensor (VSS for the Speedometer).
Give us some information regarding the Speedometer:
-Are you using the stock IPC (Instrument Panel Cluster)/ Speedometer?
-Have you altered the stock wiring for the IPC/ Speedometer?
-Is the original VSS Electrical Connector still under the Vehicle?
-If so... Have you connected the original VSS Electrical Connector to the 4L80E Output-Speed Sensor?
-What did you have done in terms of programming for the 4L80E swap?
Thread Starter
Teching In
Joined: Jan 2017
Posts: 31
Likes: 0
If the Transmission is installed and working... I would not spend $100 or more on a conversion jumper-harness.
Being that you have a 4L80E from a Two Wheel Dive vehicle; there should be a reluctor installed for the Output-Speed Sensor.
That conversion jumper-harness is mainly for the Input-Speed Sensor, and that is not going to help you for a Speedometer.
O, and Two Wheel Drive 4L60E Transmissions do have a "rear sensor", it is referred to as the Vehicle-Speed Sensor (VSS for the Speedometer).
Give us some information regarding the Speedometer:
-Are you using the stock IPC (Instrument Panel Cluster)/ Speedometer?
-Have you altered the stock wiring for the IPC/ Speedometer?
-Is the original VSS Electrical Connector still under the Vehicle?
-If so... Have you connected the original VSS Electrical Connector to the 4L80E Output-Speed Sensor?
-What did you have done in terms of programming for the 4L80E swap?
Being that you have a 4L80E from a Two Wheel Dive vehicle; there should be a reluctor installed for the Output-Speed Sensor.
That conversion jumper-harness is mainly for the Input-Speed Sensor, and that is not going to help you for a Speedometer.
O, and Two Wheel Drive 4L60E Transmissions do have a "rear sensor", it is referred to as the Vehicle-Speed Sensor (VSS for the Speedometer).
Give us some information regarding the Speedometer:
-Are you using the stock IPC (Instrument Panel Cluster)/ Speedometer?
-Have you altered the stock wiring for the IPC/ Speedometer?
-Is the original VSS Electrical Connector still under the Vehicle?
-If so... Have you connected the original VSS Electrical Connector to the 4L80E Output-Speed Sensor?
-What did you have done in terms of programming for the 4L80E swap?
