Legnum gear exchange issues

[Blackbandt]

Hello,

I have a legnum there is a W5A51-3-ECB gearbox installed. And I have a legnum where a W5A51-E6B gearbox is installed. Can I simply build the E6B into the legnum where the ECB gearbox is installed? Control unit of the E6B is also available. Or are there problems because on the E6B gear 1 sensor is more than on the ECB gearbox.

Thanks a lot

[Blackbandt]

Can no one help me?

[peter thomson]

The later gearbox may not have the speedo sensor and instead uses the output gearbox speed sensor instead . This means without using that sensor you won't have a working speedo but if the fixing point is there just swap them over and use the matching ecu

[Blackbandt]

Ok, so I can leave the sensor. I just need to install the control unit from the e6b gearbox and then it works?

[Nick Mann]

Sometimes it works. Sometimes it doesn't. I don't think we have enough information to know which combinations are okay with which looms.

[Blackbandt]

OK

I own 2 Legnum as I said. The one with ECB where dad gear is broken. And the other with e6b because the gear is fine. I own the gear and control unit of the e6b as well as the complete wiring harness. I thought it just enough gear and control unit to swap. If not, I'll probably have to swap the harness with.

[Nick Mann]

What is the dad gear? Is it the final drive?

[Blackbandt]

All I know is that Legnum went with the ECB gear. On the highway there was a jerk says the previous owner and then flashing N and the gear went into the emergency. He drove dan in 3rd gear home. Oil from the gearbox was sleazy brown. Although only new gear oil was in it. So I want to install the e6b gearbox there. I hope so that I do not have to swap the wiring harness. Therefore, the question of whether the E6b fits there.

[TAR]

That sounds like a full ATF fluid flush might sort this issue. If the gearbox overheats it will go into limp mode (3rd gear) with the gear indicator flashing. A full flush will require about 12 litres of ATF. AMSOil is highly recommended.

[Blackbandt]

From the gear come loud noises. Therefore, the transmission is also defective.

[TAR]

Gearbox noise or front differential noise?

[Blackbandt]

It comes straight from the gearbox.

[Davezj]

fresh oil in auto box is a must with a full flush as suggested above this could fix the issue.

does the car drive ok before it goes into limp home mode and N flashes 3rd gear only.

if car still not working correctly after the atf flush then have a look at this below.

i had a friend of mine with this issue, i had a look at it and drove the car and the car seemed to drive ok in all gears then the gearbox would make a bung/clunk and go into limp home mode N flashes and 3rd gear only.

the issue i fond was an intermitant input shaft speed sensor fail. it had got wet and the wires/connector corroded.

this was caused due to a vented bonnet being fitted and rain would pour into the engine bay and collect on top of the auto gearbox and the input shaft speed sensor sits a recess in the top of the auto gearbox and it is perminently wet when it rains.

replace the sensor and fix the wiring all working again.

[Blackbandt]

Yes, dare drive. But only a few meters. Then I have no more propulsion and must turn the car off and on again. Then I can drive a few meters again. As I said, on the gear come out strong grinding and scratching noises. I think I'll just swap the complete wiring harness for safety. Then there should be no problems

[TAR]

People have reported issues when swapping gearboxes of different type even when using the matching ecu. As mentioned above, there is no concensus as to what will work with what.

Let us know how you get on.

[Blackbandt]

But if I take over the original wiring harness from the e6b, everything should work. The only thing I can imagine is that the automatic control unit works together with the engine control unit.

[Nick Mann]

Please let us know the tcu part numbers and gearbox numbers. And also the result. I would suspect that you are right and swapping the harness as well will make it all good but we don't know.

[Blackbandt]

The difference between the EZB and the E6B transmission is the sensor. If, as I said, the control unit, gearbox and cable harness of the E6B gearbox are installed in the car where the EZB is installed, normally everything should work. The engine does not care which gearbox is installed.

If I'm so far with the car and have everything Rebuilt, I'll contact you again.

The plan looks like this for now

Transmission EZB incl. Wiring harness and control unit number MR553458 Out. And E6B gearbox with the fitting wiring harness and control unit numbered MR470718.

[Davezj]

Yes, dare drive. But only a few meters. Then I have no more propulsion and must turn the car off and on again. Then I can drive a few meters again. As I said, on the gear come out strong grinding and scratching noises. I think I'll just swap the complete wiring harness for safety. Then there should be no problems

did you set up the gear selector as per the required process.
the gear selector in the car and the corisponding selector on the top of the gear box where the selector on the gear box attaches to the cable.
you have to set this up correctly otherwise you will experience the same issues you have described.

the process for setting up the selector is in the manual in the library.

the basic setup is to set the gear shifter to neutral in the can set the selector on the top of the gear box so you can see through the hole in the selector arm and align it with the dot on the selector. then attach the cable and lock it into position.

if you get this wrong then the car will move a few meters and then jusp out of gear.

have you tried to dring the can in tip tronic mode start the car in Park select the tip mode and see if the car drives off ok in 1st, then select 2nd etc buy push the gear stick.

it is worth checking as it could save you a lot of hassle.


i speak from experience as i missaligned the selector when i chnaged my first auto box and thought it was broken when it was just the selector alignment.

[Davezj]

Lets us know how you have progressed with this issue. It will be interesting to see what the actual was.

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