old thread dig,
The M60, offered in the Zafira Tourer and the Astra K have the most stacked gear ratios of all M32's, with the lowest *numerical* final gear:
4.27
2.53
1.6
1.15
0.94
0.81
3.348 final gear
The total final gearing (6th x final drive) of the MZ4 is 2.24, the MZ0 is 2.93 (ouch), and a MZ4 6th gear swapped into a M60 would be 2.06.
For a 25" tall tire that means 6th gear would drop 200 rpm at 75 mph compared to stock. Where the MZ0 raises rpm by 700 at 75 mph.
Though still not as ideal gearing as the MZ0, if a 6th gear swap is possible, this setup would offer better acceleration in 1st-5th and better highway mpg than a stock sonic opcorn: + 1st would be usable unlike the RS gearing
Does anyone know if a sixth gear swap is possible? I like this idea.