Engine Brake Def and Sound Fix

Version 2.2:
* Added Iveco Strator
* Added Kenworth K100

Version 2.0:
* Fixed Peterbilt 379
* Added Kenworth T680
* Added Peterbilt 386
* Added Peterbilt 389
* Added Peterbilt 579
* Increased engine brake power

Version 1.1:
* Added Volvo VNL 670 and fix a very little issue for all Trucks

This mod fixes trucks engine brakes and their sounds mentioned below:

Freightliner 120FLD Classic XL
Freightliner Argosy
Freightliner FLB
!NEW! Iveco Strator
!NEW! Kenworth K100
Kenworth T600
Kenworth T680
Kenworth T800
Peterbilt 351
Peterbilt 379
Peterbilt 386
Peterbilt 389
Peterbilt 579
Volvo VNL670

It is include 2 scs file: (Use only one!)

1. Fixes with new sound (from TheHDStrelok)
2. Fixes with original sound

This mod fixes engine brake sound for couple of trucks mentioned above and with this mod, when you use engine brake, truck don’t do downshifts anymore. Like Kenworth T680 and Peterbilt 579.

Give more priority than trucks mod.