Hi all

I need HELP!! I have a fiat punto evo dynamic dualogic...worse decision ever in my life. I spent 700 pounds on this can of **** in a year. This year march i noticed my gearbox leaked...as no garages deal with fiat gearboxes i had to take it to fiat. They changed my potentiometer and the seals and rubber bands and refilled the fluid..380 pounds. It is November and the gearbox is completely empty, it is non driveable, Went into neutral when i was goin 70 on the motorway...does not change from 2nd to 1st or from 2nd to 3rd. (Sure cold starts dnt help either) i feel like givin up with this car ?? when its workin it drives so well, cheap petrol etc, but I cannot believe i have the exact same problem an god know how much will it be to fix now. Soooooo, does anyone had problems like this with the gearbox??? Shall i just take the loss and get rid of the car?? I only had it for a year and i cannot be spending hundreds on it every year. Any suggestion please. See pic so you can see how much its leaking

Hi.

Sounds like it wasnt fixed properly if the oil stsrted weeping out again

These systems are complex.. the actual gearbox should be fine

Go back to FIAT..!! Tell them their repair has failed.. you might be lucky

Then find an Alfa specialist to do the job properly.

Charlie

If you still need more info on refilling the Selespeed fluid reservoir:

https://www.fiatforum.com/fiorino-iii/472626-how-access-duologic-transmission-fluid-tank.html?472626=#post4473568

This might also help...or annoy

https://www.fiatforum.com/500/425006-one-only-dualogic-failure-thread.html?425006=#post4071241

D

I'm a bit out of my depth with these boxes but, as a general observation, these newer type of boxes where the box is more like a normal manual box with automated changing - our Fiat boxes, VAG DSG and others - seem to be really quite unreliable. I saw a VAG dual clutch assembly stripped down recently - Oh dear me, no thank you! I personally wouldn't even consider entertaining one. This is a shame as I have come to quite like driving automatics as a result of the frequent visits to my daughter and also my sister who live in the States where most rental cars are autos. Mostly though these have been "conventional" epicyclic torque converter type set ups which are the only type I would place any trust in.

I really do not understand what is wrong with the old well proven epicyclic gearboxes. They are solid and fundamentally strong. The epicyclic gears are straight cut but with three planet gears for each sun gear. There is always one tooth in contact so can transmit a lot of power. With a lock-up torque converter they are efficient as well as long-lived.

Twin shaft boxes as used in most cars are basic very old-fashioned design that's just been evolved to become the reliable things we have today. But the clutch and gear shift format is anything but simple as attested to by the unreliability of auto-shift systems like Selespeed.

Couldn't agree more Dave! Although some of the electronics associated with modern epicyclics are apparently causing problems because they are situated internally so subject to the lubricant and internal temperatures. Why would you choose to put electronics in an oil bath? However if you change the lubricant and screen filter(s) occasionally - which is often not specified in the service regime - they are usually pretty bullet proof.

Manual boxes took a major step forward when front wheel drive boxes went to a two shaft design. I remember it being not unusual to have to renew the lay shaft and needle roller bearings on the older type RWD boxes, where the 1st motion shaft was separate from the output shaft. Nowadays, as long as the correct lubricant is used and changed maybe every 50,000 miles? the biggest enemy is user abuse. Although a small number of boxes have well known faults - like the input shaft bearing on a couple of manufacturers popular small cars and the input shaft seal on some of our boxes and others like the crown wheel loosing it's interference fit to the diff cage - In the main, if driven sympathetically, they will probably outlast the planned life of the vehicle.

DaveMcT said:

I really do not understand what is wrong with the old well proven epicyclic gearboxes. They are solid and fundamentally strong. The epicyclic gears are straight cut but with three planet gears for each sun gear. There is always one tooth in contact so can transmit a lot of power. With a lock-up torque converter they are efficient as well as long-lived.

Twin shaft boxes as used in most cars are basic very old-fashioned design that's just been evolved to become the reliable things we have today. But the clutch and gear shift format is anything but simple as attested to by the unreliability of auto-shift systems like Selespeed.

Click to expand...

Efficiency that the main reason
Conventional type auto's Rob power and fuel economy

Duologic cars are noted for hammering the clutch. 30K isnt unusual.
Auto transmissions with a lock-up torque converter waste no power when the converter is locked. Many are more efficient in mpg terms than the equivalent manual models. They are more expensive because they don't make the same volumes and nobody makes a small engine version.