TRUCK & OFF-HIGHWAY ENGINEERING ® A Testing Powerhouse Allison's new environmental test center is open for business Revolutionizing digital hydraulics ZF addresses software escalation Bigger processors, smaller engines February 2021 offhighway.sae.orghttp://offhighway.sae.org/ https://www.sae.org/ https://www.sae.org/publications/magazines/truck-off-highway-engineering