Technical Gearbox Ratios

[Zwyczajny]

When I am assembling a new 1.1 engine, I have two gearboxes to choose from:

- 514.513.44 (2005)
- A506 (2010)

Do you have information about the ratios of these boxes, which will behave better on the highway?

I have these two gearboxes and I want to choose the best set to put on.

 

[DaveMcT]

The boxes fitted to Fiat 500 around 2013 had a very tall 5th gear. Everything else ”felt” pretty normal. It was done to massage fuel consumption figures but in reality you were always having to drop to 4th and the big gap meant more revs (and more fuel used) than you really wanted.
I can’t help with numbers or actual gear ratios - just to say avoid the 500 boxes.

 

[Zwyczajny]

Today I checked the speed on the 514.513 gearbox.
3,000 engine revs correspond to the gears/speed
1 : 20km/h
2 : 40km/h
3 : 60km/h
4 : 80km/h
5: 105 km/h

So after all, there are supposedly gearboxes with 120km/h in fifth gear and that would suit me very well, but I don't know if this A506 gearbox has it.
In addition, it is a gearbox from a car with air conditioning, so these ratios are probably not long so as not to take extra power.

 

[koalar]

As far as I can tell the numbers on the gearboxes are meaningless as to being able to tell the ratios inside
I put the first number into google and it mainly comes back with punto gearboxes which are completely different ratios

There is no change in ratios for air conditioning or dualogic

These are the ratios for
early pandas
early 500
Panda 2010 1.1 in that order

I don’t see any change in the eco version

 

[koalar]

Interesting to see side by side by side

1.2 petrol and 1.3 diesel
If you put a diesel in place of a 1.2

1st stays the same
2nd stays the same
3rd is roughly 4th
4th is roughly 5th
And 5th is a new gear or 6th

 

[DaveMcT]

The huge gap from 2nd to third on the diesel make the case for a six speed gearbox. Except the overall ratio would be too low.

You can go too high on gear ratios and spoil your fuel consumption. I did that with a 1980s kit car using Ford suspension and axle. I fitted an overdrive gearbox only to find that I needed the lowest axle ratio for it to all play nice.

In short a higher top gear was good-ish. I ended up with a slightly higher top and effectively a 5/6 speed transmission. Overdrive worked with 3rd and 4th gears.

 

[Zwyczajny]

Today i`ve first time read about aftersale equipment from decoded Vin, and there is information about gearbox.
Anyone know what mean this record?

GEARBOX WITH SPECIFIC RATIOS

Yes

(157)

 

[koalar]

Today i`ve first time read about aftersale equipment from decoded Vin, and there is information about gearbox.
Anyone know what mean this record?

GEARBOX WITH SPECIFIC RATIOS

Yes

(157)

Sorry no idea