Kiwibirdman Posted February 22, 2020 Share Posted February 22, 2020 The 4L60E auto box that i have for the Holden has the pulse out put for the speedo and no mechanical drive. I would like to keep the original speedo in the car, what have other people used. There are converters that are available, speedbox for example, but they cost about $350 US. Is there a better option or do I just have to suck it up? Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 22, 2020 Share Posted February 22, 2020 Arduino plus continuous rotation servo? Depends how valuable you consider your time to be. 1 Quote Link to comment Share on other sites More sharing options...
cletus Posted February 22, 2020 Share Posted February 22, 2020 Swap a 700r4 tail housing on it? Those electric conversion box things always seem to cost about a grand once they are in and working Quote Link to comment Share on other sites More sharing options...
ajg193 Posted February 22, 2020 Share Posted February 22, 2020 As Wayne says, stuff like this will either cost you money, time, or even both - depending on your quality requirements. Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 22, 2020 Share Posted February 22, 2020 New alias, who's Wayne? Quote Link to comment Share on other sites More sharing options...
Yowzer Posted February 22, 2020 Share Posted February 22, 2020 2 Quote Link to comment Share on other sites More sharing options...
vk327 Posted March 2, 2020 Share Posted March 2, 2020 the 4l60e and vt ecu requires the speedo input to control the transmission shift points and also idle control on deceleration, without it you'll be stuck in limp mode, the sensor is a hall effect to the ecu, the ecu outputs a scaled pulse to drive the speedo, the 2 common ones iv used for conversions are the dakota unit and, the speedhut speed box (alternately could go speedhut electronic speedo or similar 1 1 Quote Link to comment Share on other sites More sharing options...
Spencer Posted March 2, 2020 Share Posted March 2, 2020 Yeah the Dakota digital one I have seen in action and seems pretty good. Was like $300US last time I looked which seems pretty reasonable to just make shit work 2 Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted March 2, 2020 Author Share Posted March 2, 2020 Thanks Guys. I will get the Dakota Digital one, Summit Racing have them for about US$300 plus freight. Quote Link to comment Share on other sites More sharing options...
tortron Posted March 2, 2020 Share Posted March 2, 2020 https://www.classictransmissionsolutions.com/700r4-speedo-electric-to-mechanical-conversion-kit-convert-speedometer/ doesnt help the ppm to ecu problem, but theres other was you could do that, like this https://shop.classicinstruments.com/sn78sm tail housings with both mechanical and electronic speed sensors are available but at about $600 less mucking around to get the dakota unit 1 Quote Link to comment Share on other sites More sharing options...
Spencer Posted March 2, 2020 Share Posted March 2, 2020 Yeah as the guys above were saying, even for a skilled electronics type person making something like that dakota box would be insane. Like hundreds of hours, hundreds in parts then it would break. Gotta pay the boss costs to have nice new trans in your old whip. I have got 3-4 different dakota bits for fans, cruise control etc over the years and they are top notch. 2 Quote Link to comment Share on other sites More sharing options...
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