1986 Chrysler Laser XE, Speed sensor/cable location

1784 Views 5 Replies 4 Participants Last post by Jack knife, Jun 7, 2013

Jack knife

Discussion Starter · Jun 7, 2013

Hey, been a while since i was on here. As the title states I have a '86 Laser XE (2.2 T1) Since i have had the car the speedometer has been off by at least 10-20 mph off. I have the fully electronic dash, i know its not the dash its self because my odometer is off. I ordered a new speed sensor from rock auto but i cant find the location on the trans, and my repair manuel (haynes) dosent even mention its existance. I managed to get the car on a lift at my school and found a speed cable that travels up and dissapears. after speaking to my electrical teacher he said there is a junction box some where that converts the mehcanical signal to electronic. Bascially what i am requsting is a diagram and/or location of the speed sensor (if its like the one i ordered) or where ever this junction box is. if it is the junction box where can i order a new one?
Also i do have the 3 speed automatic.

the part from rockauto i ordered - More Information for STANDARD MOTOR PRODUCTS SC5

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turismolover22

· #2 · Jun 7, 2013

Your speed should be determined by the electronic signal coning from the speed sensor itself. I believe some earlier cars had to retain the cables to use cruise control. Also some earlier cars, feom my assumption, were designed with the cable regardless of cluster style as in 87 they moved to a fully electronic analog speedometer. I would assume they installed the cable in the 84-86 cars for ease at the assembly line, like having all the harness connectors in your door and floor for power options, but getting base trim.

To answer the question, the speed sensor is located on top of your transmission, behind the starter, on the passenger axle-diff housing. If the speed is physically off, you may have the wrong speedo gear/tire combo, as you can adjust for changes in tire size, etc with the speedo gear to achieve the correct speed

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Jack knife

Discussion Starter · #3 · Jun 7, 2013

Thanks. And the first part makes sense. And as I said the speed and the mileage is off so that is how I worked it down to the fact that its the sensor its self. Thanks again. Ill check that on monday and swap the part

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onerippinturbo2

· #4 · Jun 7, 2013

you at UTI or ATC???

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83scamp

· #5 · Jun 7, 2013

Jack knife said:
Thanks. And the first part makes sense. And as I said the speed and the mileage is off so that is how I worked it down to the fact that its the sensor its self. Thanks again. Ill check that on monday and swap the part

But it is working. Like Turismolover22 said, it sounds like somebody put the wrong gear on the speed sensor before you got the car. If both the odometer & speed are off. The gear is changeable, and depends on what tires/wheels you are running. For example, if somebody was in a yank to get the car running, and used a gear from an omni with 13" rims, and you are running 15" low profile, it could very easily offset your speed that much. Chrysler made a whole range of gears for just that reason. I'd be willing to bet that is your issue, not a faulty sensor.

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Jack knife

Discussion Starter · #6 · Jun 7, 2013

onerippinturbo2 said:
you at UTI or ATC???

ATC

83scamp said:
But it is working. Like Turismolover22 said, it sounds like somebody put the wrong gear on the speed sensor before you got the car. If both the odometer & speed are off. The gear is changeable, and depends on what tires/wheels you are running. For example, if somebody was in a yank to get the car running, and used a gear from an omni with 13" rims, and you are running 15" low profile, it could very easily offset your speed that much. Chrysler made a whole range of gears for just that reason. I'd be willing to bet that is your issue, not a faulty sensor.

Stock rims, original tire size. It works, just off by half. If I cruise at 60 mph it will say im doing 30. All depends on the speed im doing. Lower speeds are a bit closer. But still completly off

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