Murena high fifth gear

[Lennart Sorth]

Is this, what we see on the picture, the gear wheels which have to be changed?

There's a man of action!

Exactly 45 minutes after having read Roys post on the high fifth gear, Michael has already taken his gearbox apart and is ready to do the mod!

Thats dedication, and I think you deserve the golden Matra palms :-)


/Lennart

[michaltalbot]

 
Pic is from forum-auto.com but at night, i've made registration on Citroen forum, so i hope it won't take a lot of time to find some "fast five" 

[roy4matra]

Is this, what we see on the picture, the gear wheels which have to be changed?

Yes Michael, those are the gears.  Standard set are 33 and 45 teeth, and the ones you want are 31 and 46 teeth.  As the gear is slightly larger in diameter, the fork and cover needs to be modified to clear it.  Even if you have a Citroën box then you can't swap the fork over, even though it will already be modified, because it is different where it mounts to the selector shaft and does not fit in the Murena version.  I have the full fitting instructions for anyone doing the job.  Just download www.matraclub.org.uk/files/Fifth.txt

Roy

[Matra_Hans]

Well Lennart, you are right Michael has been very determined stripping his gearbox so soon.
But on the other hand now he is not able to drive in his Murena until he (maybe) finds a CX TD gearbox
Hans

[michaltalbot]

Roy: thank You once more very much!
 
Hans: it's not my gearbox!   my Murena sleeps at garage at knows nothing about what i am prepairing  
But on weekend, we had a nice times with our Murenas:
http://michaltalbot.rajce.idnes.cz/Vyjizdka_210609/

Oh, didn't i told you, that me and Maria will have a child? Yes, she is in 4 month of pregnancy and i will be a proud dady  

[Matra_Hans]

Congratulation.
Then it is good that you have a Murena with a middle (child) seat!

Hans

[michaltalbot]

Thank You 
Yes that's great, we could travel with our child between us - which car can offer this (except of ugly Multipla? )
Murena is the best  

[Lennart Sorth]

Thank You 
Yes that's great, we could travel with our child between us - which car can offer this (except of ugly Multipla? )

Congratulations to both of you !

Personally I never found the original (1998) Multipla ugly - it deserves a place in the world for being different - the high mounted ligts should also be a good idea in fog, - apart from the apparently rather poor NCAP rating, I think it was a great and original car, that should deserve being added to your growing signature :-)

However, the newest version of the Multipla has IMO lost all the charm, only retaining the seating arrangement - but trying to make the rest conform to an "ordinary" car - big shame.

To real original Multipla was even cooler - a "stretched limo" version of the Fiat 500 :
http://www.sorth.dk/p/20080920/Med/20080920_164030.html

/Lennart

[michaltalbot]

Lennart, i have to say, that from outside the Multipla isn't so bad at all, but interior is really very chaotic, disharmonic and its designer surelly had a lot of grass 

[macaroni]

Hey, we have a Multipla and love it!

[michaltalbot]

  i have a Tagora and love it too I think it is fine that everybody has a different taste

[Jon Weywadt]

Is this, what we see on the picture, the gear wheels which have to be changed?

Yes Michael, those are the gears.  Standard set are 33 and 45 teeth, and the ones you want are 31 and 46 teeth.  As the gear is slightly larger in diameter, the fork and cover needs to be modified to clear it, but if you have a Citroën box then you should be able to swap the fork over, which will already be modified.  I have the full fitting instructions for anyone doing the job.  Just download www.matraclub.org.uk/files/fifth.txt

Roy

If the 5th. gear speed at 1000 rpm normally is 33,79 kpm, as the repair manual states, then the new gears will result in a speed of 36,77 kph, or about 110 kph at 3000 rpm. That is closer to what I see when my tach shows 3000, so maybe I already have the 31/46 gears. But, not knowing the inaccuracy of the tach and the spedometer, the only way to tell for sure is when I count the teeth next week, when I take the gearbox apart. 

[roy4matra]

If the 5th. gear speed at 1000 rpm normally is 33,79 kpm, as the repair manual states, then the new gears will result in a speed of 36,77 kph, or about 110 kph at 3000 rpm. That is closer to what I see when my tach shows 3000, so maybe I already have the 31/46 gears.

I can almost guarantee that you don't have the high fifth gear.  All Murena have an inaccurate tachometers that means they show 3000 rpm at around 110 kph.  The fact that you get those figures almost proves it is standard.  When the high fifth is fitted it will read approx. 2700 rpm at 110 kph.  With the high fifth and the inaccurate tachometer, you will see something like 120 kph at 3000 rpm and 160 kph at 4000 rpm.

Roy

[Jon Weywadt]

If the 5th. gear speed at 1000 rpm normally is 33,79 kpm, as the repair manual states, then the new gears will result in a speed of 36,77 kph, or about 110 kph at 3000 rpm. That is closer to what I see when my tach shows 3000, so maybe I already have the 31/46 gears.

With the high fifth and the inaccurate tachometer, you will see something like 120 kph at 3000 rpm and 160 kph at 4000 rpm.

Roy

Hi Roy.

A couple of posts ago, in this thread, I did write that my spedometer reads 120 kph when the tach is showing 3000 rpm. What I should have written above was "That is closer to the 120 kph I see when my tach shows 3000 rpm"
So I am still dreaming    but I will have the tach calibrated and clock the speed from the markers on the interstate.

Jon.

[michaltalbot]

Well, finally i've found a guy who has a lot of spare parts for CX incl.lot of gearboxs. He also said that surelly will have 5th speed gears for sale for very reasonable price. On wednesday i will go to his stock and will see how many of sets (used of course) he has, so - is someone else interested? I don't know the price now, but i will tell you asap on wednesday.