There is a bug when several vmods reference the same base mod in rF2.
So if you want gear ratios uninstall every vmod except "WEC Silverstone" or you can stick with the default gear ratios (top speed ~280km/h, revs stay in save range) by uninstalling all vmods except for WEC Le Mans.
For the changes to take effect it might be neccessary to also reinstall BES 1.0 once all vmods are uninstalled