How to install MV autos shiftbox into A340E

[SL666]

fair enough.. thats is a fair bit of cash..

what do the shiftboxes cost?

[chris davey]

just added a bit about 4th gear and lockup in 1st post

[chris davey]

Ok, some weird shiznit is happening.

Previously, 1,2 & 3 were working but the OD switch was connected to the negative and it seemed that the box was somehow internally grounded as it didn't cut the power when the switch was turned on.



So what I had to do was change the switch to the positive wire so that it would definitely cut the power. I have done this (like in the diagram) and have the negative directly to a ground.

Now I have done some final checking with the multimeter to determine if the solenoids are working as they should.

When L is selected, 12v goes in and comes out and goes into the shift box but no power to the solenoids comes out?

When 2 is selected, 12v goes in and comes out and goes into the shift box and 12v power comes out to solenoid a and b and it also comes out the other side of the plug (going to the solenoids)

when D is selected, 12v goes in and comes out and goes into the shift box, 12v power comes out to solenoid B (into the plug) but no power comes out of the other end???

When I put it in 2nd and put the OD switch on, it goes from 12v to 0 on the solenoid outputs so the power cut is working.

I don't understand how it could work yesterday and when I changed the switch for the total power it changes?

I also don't understand how the power can go in solenoid B when it is in 2nd and come out the other end and then when you put it in drive the power goes into solenoid B but does not come out? WTF?

Any help would be bloody brilliant.

[sideshow]

you should have put tip tronnic on it

i can make it so all you have to do is wire power and earth

i have solenoid plugs at home and connect them straight to the gbox

hey cris have u had the valve body done

im goin to do it soon i think if u are goin to manualise the gbox then the valve body is a must

as this will also make it for much quicker changes especially when hooked up with a manual or tiptronic gear change

[SL666]

Thats not a particularly helpful post..

i have solenoid plugs at home and connect them straight to the gbox

which boxes.. mine doesn't even have plugs for any of the solenoids..

chris: maybe the box doesn't like having its power cut/etc without being in the park positon?

[sideshow]

since when are my post ever helpful

im here to sell stuff not help hehehehehe

the overdrive switch sends signal to ecu then the ecu turns overdrive on

so u have to find how the o/d works on the gbox

most boxes select o/d when none of the solenoids have power

so s1 has power for 1st
s1 and s2 have power for 2nd
s2 has power for 3rd
s1 and s2 have no power for o/d

[chris davey]

I forgot to mention that the stock od wiring has been chopped and the switch is just used to send 12v to the shift box.

I have already wired everything how it says on the diagram and I just want to know why it isn't working? Not interested in changing anything, just want my box to be manualised and to be able to select any gear I want.

I will be doing the shift kit when I pull the auto out to install the torque converter after I have been to the drags once.

sl666: I have only been testing the power to the solenoids with the power connected so I don't see why it would make any difference? This is how sean (ms75) has explained how I should do it and Mike from MV's said that the switch should be on the + not -. When I had it on the + before it was blowing fuses but I was earthing the switch instead of giving it + so that is why that was happening.

[SL666]

Chris: tis odd, sounds like as tedious as it might be, you might have to just check the connections/wiring..

when we were troubleshooting my box we hooked up some LED's across the solenoid wires so we could see what the box was doing (the computer was making it do some funky shit) it might be worth hooking these up full time on your beast, and then leaving the shifter in P, connect 12v into the 123 in wires on the shift box, to see if its doing the right thing when it definately has what its supposed to? im just trying to remember if there was an earth wire into the trans.. i don't think there was..

[chris davey]

The thing is the connections must be ok as they work in 2nd gear? Not in 3rd.

I don't understand why it wouldn't send the signal to solenoid a in 1st when it did so yesterday?

[SL666]

thats kinda what makes me think its a loose connection, and the shift box doesn't know its not in gear..

what solenoids are active when it gets no signal as to what gear the shifter is in?

[chris davey]

all signal wires from L,2 and D are working and sending 12v through the plug and into the shift box. I am 100% positive of this.

D: the 12v signal is sent from the shift box to the plug and goes in one end and does not come out the other.

L: The 12v signal is not sent at all to the solenoid.

No power from any signal wires means that it will just shift 1,3,4 when you go L,2,D and o/d does nothing.

[SL666]

hmmm is the box sealed? maybe its developed a loose connection?

as for D.. im not sure how thats possible.. the plug not making contact?

[chris davey]

box is sealed and was not moved at all during testing.

I literally held the multimeter on the solenoid b output and when changing from 2 to D it goes from 12v to 0. I then did the same thing from 2 to D and held multi on solenoid b input (shift box side of plug) and it said 12v then 12v.

It goes against electrical theory to me. A circuit is connected but it just isn't going through?

[SL666]

thats truely strange... check the impedance of the solenoid? maybe its shorting somewhere?

[chris davey]

The solenoid is in the gearbox though and I am not pulling it apart until I am ready to put the stally in!

The thing is, it was working fine yesterday and the only thing that has changed is the switching on the + and – and when the switch isn’t activated it should not be any different as it used to read 12v and continuity to ground on the correct pins and it still does?

I probably should ring Mike at MV again but I am waiting for Sean to see if he has any ideas.