06 vue with XFE cobalt 3.63 FD swap- works- 2 small issues
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From: Willamette Valley, Oregon
Are those F23? I am dealing with F25 with 4.45 and f35 with 4.05 in the L series. I also have an f40 six speed with an ecotec bell housing.
Last edited by 02 LW300; Jul 28, 2024 at 12:55 AM.
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Posts: 12,315
From: Slightly off center
I am in no way a transmission guy. You could offer me 3 million give me a month to put those pieces together properly and I still couldn't do it.
Speculation
Two wire is most likely a reluctance based sensor. Voltage is only generated when the reluctor on the output shaft passes by the sensor. So it probably puts out an imperfect square pulse wave.,0 to+? V. The computer counts anything above a certain voltage as a pulse and it can then calculate the speed of the vehicle because it knows the conversion factor from pulses to speed.
Three wire is quite possibly a hall effect based sensor. The ring on the output shaft has some magnetic portion. You run 5 volts to the sensor as a reference. Has the magnetic section comes by the sensor, a magnetic field is generated between the two, which also means an electric current is also generated. I don't remember the proportionality stuff but again, the computer has the conversion factor based on the frequency of the signal coming from the sensor.
I don't think the magnetic field would change direction at any time except when in reverse.
Speculation
So I would postulate that you have two signals, both that remain above 0V. However they are probably very different in terms of the voltage level that the computer sees as a valid puldr
The fact that the computer can interpret any of the signals at all indicates they are possibly signals that are at the same frequency. And it is a lucky accident that you are able to get a signal in fourth gear that satisfies the other sensors' criteria.
----+++
There must be a way to measure the output TSS voltage through live data on a scan tool. Determining the voltage level of the pulses that are understood by the computer will give you an idea of the voltage range you will need from the other sens
My guess is the spike level is too low, because if it was too high, I don't think any of the gears would work in cruise.
SWAG on top of speculation
Then it becomes a shot in the dark guess at the amplification factor required to amplify the one signal into a voltage range similar to what the computer understands in fourth gear.
We could build a simple 5v operational amplifier based amplification module with a variable resistor in the feedback resistor spot in order to allow smooth and constant adjustment of the amplification factor. Covering a span of three decades of amplification should be more than enough. With more information about the output level of the average reluctor based sensor, we should be able to narrow it down.
I believe my biggest mistake above and earlier posts was assuming that the output TSS was physically located in the same physical location on both transmissions, meeting the parts, the shafts, could simply be removed and the equivalent other shafts from the other transmission could just be plugged in in their place. But that is not true based on your feedback.
Which points back directly at my first comment, which is that I am not a transmission guy. I'm an analytical thinker with a good background little electronics who's actually a chemist who is now a technical writer. So it should be straightforward as to why any of this interests me.
Can you get that measurement in fourth gear?
Speculation
Two wire is most likely a reluctance based sensor. Voltage is only generated when the reluctor on the output shaft passes by the sensor. So it probably puts out an imperfect square pulse wave.,0 to+? V. The computer counts anything above a certain voltage as a pulse and it can then calculate the speed of the vehicle because it knows the conversion factor from pulses to speed.
Three wire is quite possibly a hall effect based sensor. The ring on the output shaft has some magnetic portion. You run 5 volts to the sensor as a reference. Has the magnetic section comes by the sensor, a magnetic field is generated between the two, which also means an electric current is also generated. I don't remember the proportionality stuff but again, the computer has the conversion factor based on the frequency of the signal coming from the sensor.
I don't think the magnetic field would change direction at any time except when in reverse.
Speculation
So I would postulate that you have two signals, both that remain above 0V. However they are probably very different in terms of the voltage level that the computer sees as a valid puldr
The fact that the computer can interpret any of the signals at all indicates they are possibly signals that are at the same frequency. And it is a lucky accident that you are able to get a signal in fourth gear that satisfies the other sensors' criteria.
----+++
There must be a way to measure the output TSS voltage through live data on a scan tool. Determining the voltage level of the pulses that are understood by the computer will give you an idea of the voltage range you will need from the other sens
My guess is the spike level is too low, because if it was too high, I don't think any of the gears would work in cruise.
SWAG on top of speculation
Then it becomes a shot in the dark guess at the amplification factor required to amplify the one signal into a voltage range similar to what the computer understands in fourth gear.
We could build a simple 5v operational amplifier based amplification module with a variable resistor in the feedback resistor spot in order to allow smooth and constant adjustment of the amplification factor. Covering a span of three decades of amplification should be more than enough. With more information about the output level of the average reluctor based sensor, we should be able to narrow it down.
I believe my biggest mistake above and earlier posts was assuming that the output TSS was physically located in the same physical location on both transmissions, meeting the parts, the shafts, could simply be removed and the equivalent other shafts from the other transmission could just be plugged in in their place. But that is not true based on your feedback.
Which points back directly at my first comment, which is that I am not a transmission guy. I'm an analytical thinker with a good background little electronics who's actually a chemist who is now a technical writer. So it should be straightforward as to why any of this interests me.
Can you get that measurement in fourth gear?
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Joined: Apr 2015
Posts: 3,229
From: Willamette Valley, Oregon
According to Billy and Jerama the only gear ratio that lines up rpm and mph is fourth. That is why the cruise works in fourth only. All other gears are too far off for the Bcm to make sense of the information. If you like the way it drives just deal with the fact that you only have cruise in fourth or look to Rostra. I bet an aftermarket cruise kit for an Chevy Aptiva or a Chevy Cruize might work. I like factory cruise best. If you are truly only city driving just use cruise in fourth gear.
These type of questions are why I enjoy this forum, makes me think outside the box!
These type of questions are why I enjoy this forum, makes me think outside the box!
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Joined: Apr 2019
Posts: 854
This thread made me realize my redline was the only Saturn I owned that had cruise.
my 06 Grand Ram-A-Van has cruise, cable driven. Pretty interesting. Only time Ive used it is on longer trips.
My 16 KL Cherokee has it, but I only drive that once, maybe twice a week. Again don't use the cruise. The Pentastar are pretty peppy for what they are, and I like it!
my 06 Grand Ram-A-Van has cruise, cable driven. Pretty interesting. Only time Ive used it is on longer trips.
My 16 KL Cherokee has it, but I only drive that once, maybe twice a week. Again don't use the cruise. The Pentastar are pretty peppy for what they are, and I like it!
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Joined: Jul 2024
Posts: 23
It’s more along the lines of doing something that’s different, issues come up and you come to an idea and fix it. These situations are tricky and require critical thinking and that’s really what makes it fun. The fact that the swap has never been done before to me was so interesting because it’s a great car on a great platform. If at the end of the day I get defeated at least it wasn’t because I/we didn’t try.
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