switched back to Kriechbaum sounds for the following engines :
DD Series 60
Cummins ISM/M11/L10
Paccar MX
Paccar PX

Bugfix

bugfix

Updated Volvo engine sounds to keep in line with latest ETS2 update

Added 2.66 differential ratio to Mack trucks (both for mdrive overdrive and Maxitorque transmissions, mdrive Direct Drive already had it)

Updated Robinicus sounds to the latest version

Brought robinicus sound to current version

Switched to Robinicus sounds for a few one as an experiment to compare with kriechbaum sounds.

Only exceptions are :

post-2010 ISX/X from Cummins, which are staying to the Lonestar sound (the one from robinicus, which I use for the older model, is closer to the twincam ISX in sound than the single cam one from post 2010),
Caterpillar 3406E sounds since Kriechbaum make a stock one which I do prefer over the straight pipe one
and Volvo Sounds (until someone make me a D16 sound, i'm continuing to use the sounds from ETS2)

Update the sound banks by Robinicus as he updated them recently, go say him thanks on SCS forum!