Technical gearbox conversion

[loves2spooge]

i want to change my 1299 gearbox with bottom shift linkage on it to the later top shift, i am aware ill need new driveshafts clutch clutch linkage and gear linkage, i was just wondering if theres anything else ill need and if theres any differences in ratios between the two, cheers jon

 

[loves2spooge]

noone?

 

[jo0lz]

No iDea Matey
Louie Bee might know....???
Jo0Lz

 

[lewey]

i want to change my 1299 gearbox with bottom shift linkage on it to the later top shift, i am aware ill need new driveshafts clutch clutch linkage and gear linkage, i was just wondering if theres anything else ill need and if theres any differences in ratios between the two, cheers jon

I presume we are talking turbo

Why do you need different shafts?

The final drive ratio was raised from 3.59:1 to 3.35:1 which must be one of the highest petrol final drive ratio FIAT have made. Other gear ratios were exactly the same.

The only change in ratios I can see is 2nd gear changed around 1992.

 

[loves2spooge]

i was told that the difference between the gearboxes e.g. bottom shift and top shift had different length driveshafts,

 

[Louie Bee]

Sorry I'm a bit tied up with house renovations at the moment.

I presume we are talking turbo

Why do you need different shafts?

Yer it’s a 1985 Turbo.

The intermediate drive shaft is about half inch different between top and bottom shift box setups (that's the O/S bit that's fixed by the alternator bracket.

That's the only bit of the drive shaft I changed when I did the conversion but I've only driven it about 7 feet up and back down the garage so there may be some issues when I get going properly.

Off the top of my head you need

Gear box
Flywheel (they are different)
Clutch Kit
Clutch cable (with mount brackets)
Speedo cable (different thread at gearbox end)
full gear linkage, and the blanking plate for where the old shifter goes through the floor
Some rose joints and threaded bar to make fresh x gear linkages as any second hand ones will be sloppy (thread somewhere on what to do).
the gear linkage pivot that bolts onto the cross member from below for gear linkage
the steering rack heat shield (similar location to pivot)
the gear leaver cowling and centre console with gear gator
centre console that houses the stereo as the mount point for the lower cowling don't match up

AS my Uno is a reshell from an F reg It already has the holes to take the top shift box in the firewall. you may need to make a hole for the gear selector and one or two for the clutch cable pulleys

Think the engine mounts are the same

 

[Louie Bee]

Or you can fit a MK2 turbo gearbox, same list applies for MK2 bits and bobs, but you can choose to stay with MK1 topshift clutch cable (if you change the clutch arm on the box over) or use the hydraulic setup if you can be bothered with the extra parts (clutch reservoir peddle box, pipes and hoses, clutch master cylinder and a means of housing it).

 

[SteveNZ]

Off the top of my head you need


Flywheel (they are different)
Clutch Kit

For this conversion you only need to change the friction plate to a 20 spline centre. MK2 flywheel is different but you dont have to use it.

LHS (N/S) driveshaft is also shorter on top shift boxes. An early (longer) shaft may work but its not really right.

 

[loves2spooge]

cheers boys !