Reply With QuoteHow did you get on with this idea? I've just bought a td5, and hate how the lock up is so late. I'm thinking of doing some thing with this.
Fossicker
Dave, like mentioned yes pin32 does lockup when grounded. Hard wiring it produced quite acceptable lock with a steady throttle, but fairly harsh even in 3rd under acceleration.
I didn't pursue this option really, we opted to play with the TC like you have and further fiddled with the vane sets inside. Lockup is still around 92km/h but rmp on the TD5 then sits at 2400 and 1800 after lockup - this was good enough since we didn't want to drag race the diesel disco....
Master
How did you get on with this idea? I've just bought a td5, and hate how the lock up is so late. I'm thinking of doing some thing with this.
Master
Supporterthis post has rekindled my interest in this and I may have some progress but a question for anyone who either has tried locking the converter manually by grounding pin 32 on the ECM or is able to try this and report back,
if you lock it manually, does it throw any fault codes either in the ECM or on the dash,
I am hoping it doesnt as we are just grounding it early as opposed to disconnecting it,
any help much appreciated,
Dave
Master
Hi Dave, I haven't had a chance, but would like to see what happens. I had another idea, but no one replied to my question. As the sls lowers from extended height at 30kph I think, the signal comes from internally in the ecu, if that signal could be tapped into, that could be used to lock t/c up at that speed. What do you think?
ChatterBox
Originally Posted by blindin
But doesn't it need to unlock to change gears?
Master
I think it can change gears while locked, it will just be a harsh shift. I've never messed around with it, or have experience, all I know is that mine just revs, and doesn't really put its power to use, not alone the fuel being wasted, and oil temperature. It could also be fitting to an after market tachometer I'm guessing, and have it lock at a much lower rev
Hi Dave,
Just to confirm it is pin 32 of the EAT ECU that you'd like grounded? As A32 of the ECM is one of the CAN lines.... According to the guy I bought my D2 from it has an uprated TC from Vanmatics but it seems to drive like a standard vehicle as far as I can tell from reading other forums etc, revving to 2900 - 3100 through the gears until lock up. I'm expecting my Nanocom to arrive any day soon so an excuse to give it a work out and help you along as well is most welcome.
I've had thoughts of using an arduino to intercept info on its way to the EAT ECU and alter it to provide different lock up signals but haven't got any further than the thoughts
All the best,
Geoff
Fossicker
I had a manual lockup system in my last car, a 3L diesel patrol (went back to a landy because its more reliable).
In the patrol you need to have two relays, one to isolate the wire going back to the ecu when operational so it doesn't throw fault codes and one to actually trigger the lockup. I imagine the disco will throw fault codes if it sees the lockup wire going to earth on its own too.
My setup had a small round button in the spare foot rest on the left and a switch on the dash, to activate it you turn switch on and press the foot switch. It was also wired into the brakes so as soon as you tap the brakes it disengages.
I've also thought maybe to put a kind of interlock on it so that a relay coil is made by the 3rd and 4th gear solenoid and then a further switch can be made if required when the relay contacts are made so as to prevent unwanted TC lock up in the lower gears.
Fossicker
Holy thread resurrection Batman!
Initially I apologise for resurfacing an old thread, however it disappeared into obscurity without really going anywhere and being a D2 Td5 Auto owner I'd like it to.
I have been looking into the same things myself. I have always felt that the lockups were all wrong. 50 mph (80 kmh) in third to lock the box up is way too high particularly when it's in lock you can pootle all the way down to 35 mph (56 kmh) in third and keep it locked, so why not lock it at 37 (60 k's) and then 47 mph (74 k's) in 4th.
The Mosfet used to engage the lockup solenoid is a IR952. Source to ground, drain to output. So you can splice into the wire on pin 32 and lock it manually by grounding through a switch without causing any damage to the mosfet. Although there is a feedback circuit to monitor the health of the solenoid on the output of the mosfet so it might go into fault mode. Only way to find out is try it. If it does fault out then you can simulate the feedback with a resistor which should cure that side.
I currently have the controller dumps from a V8 and a TD5 GS8.87 controllers that I am looking into to see if I can make this happen without the need for extra mods to the wiring and switches ect by possibly editing the lockup maps to engage the lockups earlier. I haven't found the relevant maps yet although all the maps are revealing themselves slowly as I go through the code.
The above is just 2 options though. There are more. I have a project on the go at the moment to make a complete standalone control system for a 4HP2xE which is 80% finished. It's being built at the request of a friend who road tests all the more insane TD5 tuning stuff I put together in his tricked out defender that's regularly off the clock speed wise!He has some crazy off the wall idea about a 'box he has there, which usually ends up being a lot of fun along the way
.
When finished it'll be a full system with programmable auto shift and lockup maps, sequental shifting and manual gear selection on the lever like the D2 does in manual mode in low box. Something like the compushift but specifically tailored for the 4HP2xE
This is the second controller I have made as I did one for a GM 4L60E earlier in the year when we were planning on putting a supercharged 3.9 and 4L60 trans in the racer, but we have decided to carry on with Td5 power next years season as we feel that we haven't fully extracted all the engine has to offer.
Seeing as the 4HP2xE does not have a 3/2 downshift solenoid to contend with and there's no next to no feedback from the box it has actually been easier so far to code up than the 4L60 controller.
Also....
The above standalone controller can easily be made into a lockup controller with the right coding. It actually started out code wise as a basic lockup controller to prove the coding for the inputs and speed sensing etc.
So there is plenty of scope for these mods ranging from a simple switch to the very nerdy full controller.
Merry Christmas all
Psi
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