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Disc brake gearbox ratios
Is this disc brake gearbox from a 2cv or from a Dyane/Acadiane/Ami8?
Method 1:
Remove the gearbox lid.
Count the number of teeth on the front most gear on the uppershaft.
19 teeth is 2cv, 20 teeth is dyane/acadiane/ami.
Method 2:
With gearbox in the car:
Jack up one wheel.
Put the car in first gear.
Mark a point on the ventilator.
While turning the lifted wheel 1 revolution, check how many revolutions the ventilator makes.
With a seperate gearbox:
Block 1 driveshaft end.
Put the gearbox in first gear.
Mark a point on the input shaft (use old clutch plate or a welding clamp).
While turning the other driveshaft end 1 revolution, check how many revolutions the input shaft makes.
On a 2cv gearbox, the ventilator / input shaft makes 10 3/4 revolutions.
On a Dyane/Acadiane/Ami8 gearbox, the ventilator / input shaft makes 11 1/4 revolutions.
Note that the difference is only half a revolution!
Method 3:
Jack up one wheel.
Put the car in 4th gear.
Mark a point on the ventilator.
While turning the lifted wheel 1 revolution, check how many revolutions the ventilator makes.
On a 2cv gearbox, the ventilator makes 2 3/4 revolutions.
On a Dyane/Acadiane/Ami8 gearbox, the ventilator makes 2 1/2 revolutions.
Note that the difference is only a quarter a revolution!
Disc brake gearbox ratios
Is this disc brake gearbox from a 2cv or from a Dyane/Acadiane/Ami8?
Method 1:
Remove the gearbox lid.
Count the number of teeth on the front most gear on the uppershaft.
19 teeth is 2cv, 20 teeth is dyane/acadiane/ami.
Method 2:
With gearbox in the car:
Jack up one wheel.
Put the car in first gear.
Mark a point on the ventilator.
While turning the lifted wheel 1 revolution, check how many revolutions the ventilator makes.
With a seperate gearbox:
Block 1 driveshaft end.
Put the gearbox in first gear.
Mark a point on the input shaft (use old clutch plate or a welding clamp).
While turning the other driveshaft end 1 revolution, check how many revolutions the input shaft makes.
On a 2cv gearbox, the ventilator / input shaft makes 10 3/4 revolutions.
On a Dyane/Acadiane/Ami8 gearbox, the ventilator / input shaft makes 11 1/4 revolutions.
Note that the difference is only half a revolution!
Method 3:
Jack up one wheel.
Put the car in 4th gear.
Mark a point on the ventilator.
While turning the lifted wheel 1 revolution, check how many revolutions the ventilator makes.
On a 2cv gearbox, the ventilator makes 2 3/4 revolutions.
On a Dyane/Acadiane/Ami8 gearbox, the ventilator makes 2 1/2 revolutions.
Note that the difference is only a quarter a revolution!