Push starting an automatic THM125C? Anybody tried? (Page 2/2) Will NOV 23, 02:42 PM quote Originally posted by MarkS: For an automatic transmission to allow push starting, it needs to have a 2nd pump driven by the driveshaft. The older Chevy Powerglides had that but eventually even those lost the rear pump. This... Only automatic transmissions with a rear pump can be push/tow started. As engines and electrical systems became more reliable, the need for a rear pump for push starting went away and MFG's stopped including them.