R100 Posted May 3, 2015 Share Posted May 3, 2015 When performing an engine transplant using a different engine and auto box (retaining the factory loom and ecu for that engine and trans) that utilises an electronic speedo drive/sensor and the vehicle its being transplanted into has a cable speedo how do i connect the cable speedo ? If i remove the electronic sensor and fit a cable drive will the auto trans still change gears. The 2 engine transmissions in question are Toyota 1UZ & Auto VR/VS holden V8 & Auto Its been at least 5 years since ive done a 1uz swap with and auto trans. The first car i just fitted a gps speedo The second car was a supra that had an electronic speedo anyway. I have seen pic on the interweb of T drive units that fit between the speed sensor and box to allow a cable to be used. But is this necessary on a 1UZ or Holden V8 ? Has anyone had any first hand experience with this ? I guess i really want to know is will everything still work as it should with the electronic speedo drive removed.. Thanks Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted May 3, 2015 Share Posted May 3, 2015 This is a hurdle I have to get over with my VT V8 into early Holden project. I think that the computer needs to have the speed sensor in place to change gear at the right time. The options I have come up with so far are converter box, probably the easiest answer, last time I looked about US$300 aftermarket electronic speedo, US$140 get a VT cluster and hide the speedo guts behind the original speedo I'm going to give option 3 a crack if I can get a cluster for not too much money. Keen to find out how you get on. Quote Link to comment Share on other sites More sharing options...
cletus Posted May 3, 2015 Share Posted May 3, 2015 a 1uz swap that i did, i adapted the nissan (vehicle it was in) electric speedo drive to the toyota box, which must have been seperate to the speed sensor that the trans uses, cause i remember dicking around with that side of the wiring after it was on the road for a while, to get it shifting correctly. 3.8 swap i did int another nissan, the electric speedo drive part just unscrews off and a cable screws on. this was a VP box so not sure if the same. that one didnt need anything in the way of a speed sensor to work, apart from the converter lockup didnt work or it didnt have one, dunno. Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted May 3, 2015 Share Posted May 3, 2015 As I understand it for the 4l60E (VP auto box) the computer need to know that the car is doing more that 72 Kmh to lock up the trans. I know on my chevy truck the lock up works at about that speed. Quote Link to comment Share on other sites More sharing options...
cletus Posted May 3, 2015 Share Posted May 3, 2015 come to think of it another 3.8 conversion i did some work on, we wired a manual switch in to get the lockup to work Quote Link to comment Share on other sites More sharing options...
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