 INDIANAPOLIS--BUSINESS WIRE--Allison Transmission, a leading designer and manufacturer of conventional and electrified vehicle propulsion solutions and the largest global manufacturer of medium- and heavy-duty fully automatic transmissions for commercial and defense vehicles, is pleased to announce that it has signed an asset purchase agreement to acquire the transmission portfolio of India-based AVTEC Ltd.s off-highway business and AVTECs Madras Export Processing Zone MEPZ off-highway co 