I'm confused (no change there then ).

Have I got this right? You've spent £2760 on a remanufactured transmission to find that it has exactly the same problem as the one it replaced?

Phil

Yeah in a nutshell Phil, put it this way I'm not planning on spending a penny more till the problem is fixed, at whose cost I don't care, but it won't be mine.

It would appear that the first LR Specialist I took it to just told me straight from the diagnostic that it was a mismatch between 5n6 (I could have told him that from driving it), but it required new/recon box.

I then took it to a v reputable guy, but still have same problem. It goes back on Tuesday, so fingers crossed he with everyones thoughts (from fullfatrr) and his own, he will be able to put it back together lol.

She was my leaving present to myself after 22 years in the mob, n now I'm looking for work to pay for her, Sod's law but I luv her lol

Richie

I have the. 3-4 shift problem, but it's only on hard acceleration / kick down??
Totally unnoticeable rest of the time..
Would solenoids solve this ? Alcohol and eBay is never a good mix

2006 4.2 Supercharged, Java Black

E4GUY I'm not the one to answer this as I'm in the same boat as you lol 😞 however be careful not to replace the gearbox before exhausting all other cheaper avenues lol. Good look mind 😉 Richie

Guy / Richie (I'm not even going to try and crack a joke on the name combo!)

I had the 3-4 shift problem. I was told by a LR dealer that I needed a new gearbox and by a local auto gearbox "specialist" that the only solution was for a recon gearbox @ £2.5k but with the expertise and knowledge of both Phil and Eugene (I will forever be in your debt, Chaps ) my issue was completely solved by replacing one solenoid.

Take a read of this:- http://www.fullfatrr.com/forum/topic22497.html 2006 4.2 SC
2019 Renault Zoe Dynamique Nav

Time for me to 1. Replace a solenoid, 2. If it works, open a bottle of 'kick ass' lol. I will definitely let you all know next week, but a genuine thanks to all at this stage 👍😉

The ‘obvious’ culprit would be the EDS3 (yellow) solenoid which provides pressure to the end of the clutch valve C spool . However, the C clutch is also used in 2nd gear. Is the 1-2 shift okay?

Click image to enlarge

Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated

Hi guys, it looks like the Mechatronic on Richies car may not have been replaced at all, hence the problem still being around. Granted that it seems very unlikely that they didn't replace it but hey, stranger things have happened (and I should know !!!).

E4 Guy, the problem started very mild with me and just grew worse over time as we (well mainly Phil) were trying to find out what the heck was going on. Since then a few forum members like SKOT have had the same issue and it was resolved by replacing the single or full set of solenoids.

Richie, reverting back to the old software may not make any difference, it sounds like your solenoid (s?) is just getting worse like what happened on mine. If it is the solenoid of course. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Jeepers, I’d be pretty upset if I’d paid nearly £3k for a remanufactured transmission to find out that they’d taken the Mechatronic unit out of my old one and fitted it to the ‘new’ one.

Anyway Richie, if you want a (used) replacement solenoid to try I’d be happy to provide you with one. I’m only 30 miles up the road from you (Leyland).

Phil

Replacing the solenoids is a relatively easy job, I have done it a few times now while we were trying to figure out what was going on. Phil helped me out as well, got me some of his second hand parts while we were trying to figure out the problem and he got me some of the new parts as I couldn't get them in Nigeria.

I hope it is the solenoid and I can even see a strange kind of logic in not replacing the Mechatronic. I mean if the gearbox outfit is not aware that the problem is actually caused in the Mechatronic then it makes sense not to replace an expensive part like that. We are now aware of the problem but if you are not, it may make perfect sense to keep the old one in. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Which is exactly what my auto gearbox specialist was suggesting to me, rebuild the gearbox and swap the Mechatronic over from the original gearbox to the "new" one. As this is an expensive part which I think (just for fun!) is electronically coded to the VIN so I guess you can see their logic. It's just that we now know (thanks to Phil) that this process is in fact replacing all of the parts which don't need replacing and retaining the faulty one.

I hope that simply replacing the solenoid works here too. Fingers crossed for the next steps.  2006 4.2 SC
2019 Renault Zoe Dynamique Nav

Ahh, maybe there’s the clue. This certainly wasn’t the case with the 5-speeds where the transmission ECU stayed with the vehicle and wasn’t tied to the VIN anyway.

Can anyone confirm that the transmission ECU on the 6-speeds is tied to the VIN and therefore requires the availability of the proper diagnostics kit to allow the Mechatronic unit to be changed?

Phil

RRPhil,

So I have no dramas what so ever with the 1-2 shift.

Phil the solenoid offer would be gratefully appreciated, when would be a good time to come up..??

Ebajema, you mentioned that you had changed the solenoid yourself, how easy is this as I would look to do this myself, funds and all that whilst out of work

Richie

Hi Richie,

First you PM me your email address. I will then email you a word document which is a shameless cut and paste of Phils famous ZF 6HP26 Gearbox Teardown post on this very forum and you follow the section relating to the Mechactronic removal

Or you go to Phils Gearbox Teardown post yourself and do exactly what I did

I use a big plastic tray, normally used underneath washing machines (so when they leak the water stays in the tray). This will catch all the oil from the gearbox and filter.

You can do it lying underneath the car with the car in high (I'm not very chubby, just a bit of middle age insulation layer around the abs), not comfortable but doable. If you can get access to a ramp/pit, that would be better and easier. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Ok then, the RR has been back in. A tech specialist with diagnostic tool has assessed through diagnostics and driving the car that the Mechatronic unit is corrupt after a previous owner had the engine remapped. After driving it he stated that there was an over rev between 3-4 and no hold on 5, this had been to engine remap fail to improve the power.

It is correct that the mechatronic unit IS linked with the 6 speed onwards and the VIN. Therefore a new mechatronic unit @ £850+ vat is required.

Could this have just been replaced prior to the gearbox, if I had of known the problem...??? Who knows, I'm starting to save the pennies, well pounds.

Guys thank you for all your help,

Richie