Got to say GM builds a good ATX..that and the LS1/6 "low tech pushrod" V8 are about all they do particularly well. The GM turbohydromatics were used in Rolls Royces for years until BMW bought them & changed to ZF. The are relatively efficient (ATX Z28s for example are often within 10-15 RWHP of MTX..compared to a 20 FWHP difference with the CD4E on a much weaker motor = big % difference).
