Pig Pen's 89 GMC 2wd SAS Auto to SM465

[stutaeng]

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Awesome build!

 

[Supercharged111]

Buffer box would be below the PCM. Small thing with a plug going to it. Easy grab from the junkyard.

 

[Hamps]

I will check underneath the pcm again but I did not see it first time around.
I’m sorry if I wasn’t clear and thank you very much for the quick reply. I think the buffer boxes came into play with electric trans’ and I have seen them in the middle underneath the glovebox insert.
I showed a pic of my glove box and can’t seem to find consistency on location. My Speedo worked perfectly before the swap but I have swapped from a 2wd 700r4 to a NP208 cable drive.
I need to verify the pulse per mile setup so I can convert analog to digital signal.
https://tpiparts.net/inc/sdetail/10539/7586
This should work. I will look in the daylight but I didn’t see anything underneath pcm first go.
Thanks to all getting this sorted.

 

[Supercharged111]

I will check underneath the pcm again but I did not see it first time around.
I’m sorry if I wasn’t clear and thank you very much for the quick reply. I think the buffer boxes came into play with electric trans’ and I have seen them in the middle underneath the glovebox insert.
I showed a pic of my glove box and can’t seem to find consistency on location. My Speedo worked perfectly before the swap but I have swapped from a 2wd 700r4 to a NP208 cable drive.
I need to verify the pulse per mile setup so I can convert analog to digital signal.
https://tpiparts.net/inc/sdetail/10539/7586
This should work. I will look in the daylight but I didn’t see anything underneath pcm first go.
Thanks to all getting this sorted.

The VSS won't jam right into the 208? I think there's a unit out there that will.

Edit: here ya go.

https://www.summitracing.com/parts/dak-sen01128

You can find the buffer box in a truck with an electronic transmission.

 

[yevgenievich]

also gm used gear driven electronic vss in early 87-88 firebirds and other vehicles. Between various 87-91 gm vehicles I had came across few that had a gear driven electronic vss

 

[Hamps]

Rog ya that is ideally what I figure will work. I’ve never messed with anything quite like that. The tpi specialist seem to have an item I think would work. I reached out because I figured there was a little more expertise on here, much appreciated.

 

[Hamps]

Thanks for the link but it is a 40 pulse. I believe mine is a 2 pulse. This is basically the route I am wanting to go but I need to verify if I indeed have a 2 pulse or if I have to get something from Dakota as a stepper to a 2 pulse. I hope I have explained that well enough. I appreciate the link though.

 

[Hamps]

https://howellefi.com/product/tpi-tbi-vehicle-speed-sensor/
I will reach out to these guys Monday and see if this will work. Appreciate all the help from y’all.

 

[PlayingWithTBI]

I will check underneath the pcm again but I did not see it first time around.

On 88 - 91 the buffer is on the back of the speedo cluster. The VSS is 2K PPM.

http://67-72chevytrucks.com/vboard/showthread.php?t=313815

Edit: you can do the jumper thing as shown in this link or install dip switches for easier calibration.

 

[93chevyluvr]

Nice I’m planning on a Ford super duty axle swap and a Cummins 4bt in my 93

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