Gear and Difs RATIO

[archigraphe]

HI,

The 1300 gearbox I would fit on my car comme from a Serie 2 1300 Beta.

The difs ratio from this car is different of the first serie.

So, I only know the ratio from the first serie coupé they are :

2000 : 14/53 : 3.78
1800 : 14/55 : 3.92
1600 : 14/57 : 4.07
1300 : 13/58 : 4.46

Could you confirm this ratios for late Beta :

2000ie  : 14/53 : 3.78
2000vx : 19/62 : 3.26
TREVI VX : 19/65 : 3.42

The ratio seems different on some model,
like the first gear on some beta, or the fifth gear between the trevi and coupé VX.

I'm looking for a short box on the first 4 gear and like an overdrive on the 5th for the highway ralliement...

[lukasdeopalenica]

The beta instruction book from 1983 says:
1300-   14/59 (4,214)
1600-   14/55 (3,929)
2000IE- 18/65 (3,611)
VX-      19/62  (3,263)

whereas gearbox ratios are:
1st: 3,5
2nd: 2,235
3rd: 1,522
4th: 1,152
5th: 0,925
R:    3,071

[archigraphe]

Ok ,

so the diffs are very different between first serie and others....

Have you the 83 instruction book, Can you partage it?

Or it is downloadable?

[lukasdeopalenica]

I have a copy and I surely can make a pdf. Just please indicate me the sharepoint where I can load it.

[archigraphe]

so the last version of the file.

[lukasdeopalenica]

Refreshing a bit the topic I would like to ask you Guys if there is a method of distinguishing the diff ratios without dismantling the gearbox? Any markings on the housing etc? As far as I remember my fiat 131 supermirafiori has painted diff ratio on its housing.

[archigraphe]

Humm..

Some Box have the diffs engraved on it
Some haven't....

So, maybe with the production number.

[lukasdeopalenica]

Have you already replaced your gearbox? I just realised that mine probably comes from a 1.6 model. I made some calculations and compared with satnav readings. The results are I reach only 100km/h at 3300rpm at 5th gear (while speedo shows only about 70 - speedo driven shaft came from 2.0ie version) The proper speed at the proper diff should be 111km/h.
I have another gearbox definitely from 2.0ie model, but before I installed the wrong one I had no idea about it...
Is any way to swap just the differenial without removing the whole gearbox/drivetrain? I know that the Haynes says no way...

[Nigel]

Have you already replaced your gearbox? I just realised that mine probably comes from a 1.6 model. I made some calculations and compared with satnav readings. The results are I reach only 100km/h at 3300rpm at 5th gear (while speedo shows only about 70 - speedo driven shaft came from 2.0ie version) The proper speed at the proper diff should be 111km/h.
I have another gearbox definitely from 2.0ie model, but before I installed the wrong one I had no idea about it...
Is any way to swap just the differenial without removing the whole gearbox/drivetrain? I know that the Haynes says no way...

You can remove both gearbox shafts in-situ,as I have done to replace bearings,
but you can't remove the diff this way. The whole thing has to come out.