yella 90 Posted June 14, 2009 Share Posted June 14, 2009 ive got the chance of getting a autobox from a disco2 so im looking to convert my td5 90 to auto. space is very limited, that limited that ive had to move the engine and gearbox back, and have my 200tdi props shortend and lengthend. does anyone no what the overall length of the td5 autobox is vs the std r380 ?? ino about the torque converter issue but what else do i need ? are they a " compushift "?? which confuses me.... im a virgin to autos what bits of loom will i need any ecu ? and will it plug direct into my ecu serial ports when removing the corresponding blanking plugs ? cheers guys dan Quote Link to comment Share on other sites More sharing options...
BogMonster Posted June 14, 2009 Share Posted June 14, 2009 <creak> sound of can of worms opening.... No it isn't an Ashcroft compushift though I expect you could make it work with this. The auto gearbox ECU in the D2 installation talks to the Td5 engine ECU and I suspect the whole thing would be a nightmare to install and get working to the original spec. If you do manage it, post up the story Quote Link to comment Share on other sites More sharing options...
yella 90 Posted June 14, 2009 Author Share Posted June 14, 2009 <creak> sound of can of worms opening....No it isn't an Ashcroft compushift though I expect you could make it work with this. The auto gearbox ECU in the D2 installation talks to the Td5 engine ECU and I suspect the whole thing would be a nightmare to install and get working to the original spec. If you do manage it, post up the story hmm, zf box from a tdi and fit bellhousing from a td5 ? or is there a way of converting the td5 box ? ill be removing the box from a scrapper, so i will be able to get everthing at this rate it'll be staying a man as im confused before i even start Quote Link to comment Share on other sites More sharing options...
BogMonster Posted June 14, 2009 Share Posted June 14, 2009 I think at one point Ashcroft were doing it like that - the purely hydraulic Tdi box with a Td5 torque converter and bellhousing, but not 100% sure about the details. It's probably the "easiest" way of doing it but I'm sure the Compushifted one works well once you get it up and running. I don't know how the change points on the Tdi box work with a Td5 but they can't really be any worse than the "rev the 'llocks off it" shift technique that the Td5 box uses. Quote Link to comment Share on other sites More sharing options...
GBMUD Posted June 14, 2009 Share Posted June 14, 2009 The Tdi auto changes gear by means of hydro pressure opening valves to change the gears at the right time. The Td5 auto uses 'lectrickery to do the same thing. It may be possible to get it working with the original ECUs, but the consensus seems to be that it is a nightmare - needing the original gearbox ECU to talk to the engine ECU and the body ECU as well as probably the alarm ECU and then lying to them all to get them to cooperate with one another to get the job done. Ashcrofts sell a 'Compushift' system (Compushift is the name of the system, not a generic name) which is a black box that does all the maths and sends the right amount of 'lectrickery to the right bit of the box at the right time. You can change shift points, lock-ups and all sorts with it. If I went auto, I would Compushift. Chris Quote Link to comment Share on other sites More sharing options...
SteveG Posted June 14, 2009 Share Posted June 14, 2009 does anyone no what the overall length of the td5 autobox is vs the std r380 ?? IIRC talking to Dave at Ashcrofts, they are almost same length. ino about the torque converter issuebut what else do i need ? are they a " compushift "?? which confuses me.... im a virgin to autos what bits of loom will i need any ecu ? and will it plug direct into my ecu serial ports when removing the corresponding blanking plugs ? cheers guys dan Using existing D2 gearbox ECU and wiring is possible but is a lot of hardwork. Two alternatives as has already been suggested use Compushift or convert box to hydraulic. Compushift is better, but hydraulic works ok. Try to get gearshift, linkages etc, cooler and all pipework, pedals etc. too When I spoke to Dave about this he recommended changing out torque converter to larger P38 one if you have a remap or stage 2 tune. Cheers Steve Quote Link to comment Share on other sites More sharing options...
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