GMPT 4L60E

  The GMPT 4L60E is a GM automatic transmission.  Some 4L60E’s will have this stamped on the case, usually on the bellhousing portion.  The GMPT itself stands for General Motors Powertrain.  It’s similar to the way that MD8 was stamped onto the 700R4. GMPT Folklore. Many enthusiasts see this stamp on the case and get … Read more