Can i use a 91' transmission in my 93' car? - Club Lexus Forums


Can i use a 91' transmission in my 93' car?

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Old 08-08-14, 02:05 PM   #1
Terje1
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Default Can i use a 91' transmission in my 93' car?

As topic.


So i got a 93 with a 91 tranny and my speedometer is showing about 30 miles too much all
the time.
The needle is not flickering or jumping around at all,it just show way too high speed.

What can be wrong?

Does the 93 transmission have less "teeth" on the sensor wheel?
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Old 08-09-14, 03:33 PM   #2
steve2006
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Could be different as the 90-92 has a mechanical odometer and the 93-94 has an electronic display odometer.
Seems strange though as you would have thought if the speed sensor was incorrect you would get a percentage error so 10% up at 30 would read 33 and at 60 it would read 66MPH not a 30MPH error throughout the whole speed range.
I'm asuming the needle is a zero when the car is stationary?
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Old 08-09-14, 09:03 PM   #3
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There's a design change and there's a no direct compatibility.
In order to overcome this, you need to use an interface circuit which converts the signal to match. But this converter is not sold at all as a unit in the market. A PIC micro controller, a FPGA or some discrete circuit can be a choice to make a converter by someone who is capable.
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Old 08-10-14, 03:37 AM   #4
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Quote:
Originally Posted by steve2006 View Post
Could be different as the 90-92 has a mechanical odometer and the 93-94 has an electronic display odometer.
Seems strange though as you would have thought if the speed sensor was incorrect you would get a percentage error so 10% up at 30 would read 33 and at 60 it would read 66MPH not a 30MPH error throughout the whole speed range.
I'm asuming the needle is a zero when the car is stationary?

Yes,The needle is at zero when the car is stationary.
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