Warning! Seriously boring thread ahead.
I have learned a lot about the FIAT way of doing things and which parts between the models are interchangeable and which are cheap upgrades etc., but the gearboxes seem impossible to pin down technically.
Seasoned FIATers will know that there are broadly speaking two types of 6 speed FIRE boxes, the early and late (current) types, aka C513 and C514 respectively. I'm interested in the later type for my Panda project. I want a sixth gear with a really nice high ratio for really relaxed motorway cruising, but the rest of the gears are good. I currently have a 5 speed with a high 3.4:1 FD. As the 6 speed box has very nearly the same ratios as the 5 speed except for 5th and 6th, it sounds like I can put my long diff in a GP (4:1 FD) 6 speed box and job's a goodn'. Reality is I need to use a matching 6 speed layshaft as these have the FD pinion on them and they need to be paired up correctly.
So onto my point: If you read the various eLearn info apps, you will see various different FD ratios for six speed boxes depending on spec. Sporting models generally being lower. Same gearbox, but different layshaft and crownwheel. So I thought I would have a look at ePer for different layshaft part numbers to pin down how they are used. There is only one part number for every six speed box of every FIRE model. This simply can't be true. You can't create the correct ratios with the same pinion.
This non-existent part issue is currently plaguing people who bought a Quaife LSD in the group buy and are looking to fit their crownwheels to it. They open their boxes to find the design makes this not possible. They then look on ePer and there is no satisfaction. You can't buy the crownwheels or diffs without crownwheels used on most FIAT FIRE gearboxes. Just one part number given. Eh? Another example is the first gear of six speed sporting models is longer than any other box. Great idea. ePer says there is only one first gear for all models, so how do they achieve this? More un-buyable parts.
1) Is there a logical explanation for all this?
2) Can you remove the FD pinion from the layshaft of modern Punto/ GP Punto boxes, despite what the diagrams will lead you to believe in the same way that you can separate modern crownwheel/differentials despite not being able to buy separately?
I have learned a lot about the FIAT way of doing things and which parts between the models are interchangeable and which are cheap upgrades etc., but the gearboxes seem impossible to pin down technically.
Seasoned FIATers will know that there are broadly speaking two types of 6 speed FIRE boxes, the early and late (current) types, aka C513 and C514 respectively. I'm interested in the later type for my Panda project. I want a sixth gear with a really nice high ratio for really relaxed motorway cruising, but the rest of the gears are good. I currently have a 5 speed with a high 3.4:1 FD. As the 6 speed box has very nearly the same ratios as the 5 speed except for 5th and 6th, it sounds like I can put my long diff in a GP (4:1 FD) 6 speed box and job's a goodn'. Reality is I need to use a matching 6 speed layshaft as these have the FD pinion on them and they need to be paired up correctly.
So onto my point: If you read the various eLearn info apps, you will see various different FD ratios for six speed boxes depending on spec. Sporting models generally being lower. Same gearbox, but different layshaft and crownwheel. So I thought I would have a look at ePer for different layshaft part numbers to pin down how they are used. There is only one part number for every six speed box of every FIRE model. This simply can't be true. You can't create the correct ratios with the same pinion.
This non-existent part issue is currently plaguing people who bought a Quaife LSD in the group buy and are looking to fit their crownwheels to it. They open their boxes to find the design makes this not possible. They then look on ePer and there is no satisfaction. You can't buy the crownwheels or diffs without crownwheels used on most FIAT FIRE gearboxes. Just one part number given. Eh? Another example is the first gear of six speed sporting models is longer than any other box. Great idea. ePer says there is only one first gear for all models, so how do they achieve this? More un-buyable parts.
1) Is there a logical explanation for all this?
2) Can you remove the FD pinion from the layshaft of modern Punto/ GP Punto boxes, despite what the diagrams will lead you to believe in the same way that you can separate modern crownwheel/differentials despite not being able to buy separately?
