[ClioAutomatic]

Another reason for going into limp mode when hot is overhearing but this obviously only occurs when the engine and gearbox are hot. If it's doing it when cold then the solenoids should be on your list of likely causes.

Cheers

Interesting post there from Ed8, that if it happens when cold it more likely to be caused by the solenoids, but if it happens when hot then it's more likely the oil is overheating.
That sounds logical, and I haven't seen that nice distinction made anywhere else, so thank you Ed8.
So, maybe it's the oil cooler that's caked up; well maybe not "caked" but just restricted somehow. I wonder what you guys think of the "oil cleaner" products you can buy, that claim to clean out the auto box? Or should we just change the fluid?

 

[ClioAutomatic]

You can try changing the oil to fix the problem, however it's a long-shot and you might be better off keeping the 100 quid you spend on oil and put it toward the repair.

I haven't done any work on a DP0 box myself, when my DP0 failed (several times) I paid an independent Renault specialist.

I believe (but don't quote me) that there were two types of heat exchangers on the DP0/AL4 boxes although that
Maybe changing the oil will help with either or both issues, if you have them.


Cheers

So, I wonder what is the likely cost of a proper repair, from a Renault specialist, for the limp-mode problem? I'm guessing many hundreds, possibly £2,000?

 

[ClioAutomatic]

FWIW - the solenoid replacement is NOT GUARANTEED to solve ANY problem - there are many other causes of the exact same common pressure regulation problem and its this tripping up the replace the solenoids brigade

http://www.fabiotnt.com/cars/peugeot/307/AL4PressureRegulationFault.pdf

I'm grateful for the input from the more experienced members on this problem.

I do also appreciate Victor's desire to try to fix the gearbox without going to Renault. For me there would be an incredible feeling of "beating the system" if successful. The "system" seems to be that Renault know these auto boxes will fail, and they know they will charge you a huge amount for a full overhaul or replacement, and they hope to sell you a new(er) car instead. Maybe I'm just a bit cynical! The CLIP tool seems to work along the same lines, but in fairness Renault is not the only manufacturer to try to keep the essential work within their dealer network (e.g. have you ever tried to replace the brakes on a modern BMW? )

"Sealed for life" yes, but the life is about 60,000 miles.

I would also be changing the oil and the solenoids, and if it improved the situation a little I'd be quite glad.

 

[ClioAutomatic]

Good luck Victor, and I'm lurking here as I may be doing the fluid change on ours at some point.

 

[ClioAutomatic]

Hi all
Resurrecting an older thread I know, but I found this Russian page on the DP0 / AL4, and I wonder what the experts think of the information in it .. allow a little poetic licence for the translation from the Russian, I mean just focus on the information :
What oil pour into Al4. The principle of functioning Al4. (marshalinstrument.ru)

(Just to note: Don't worry about the "Click Allow" bit, just re-load the page a few times and it lets you view everything.)

 

[ClioAutomatic]

Just to clarify, this is the recommended official ATF oil for these gearboxes, i.e. many Renaults for the last few years, until the twin-clutch systems came in, and excluding the robot manuals (Quick-shift etc):-