4L60E Won’T Shift Into Overdrive? Here’s Why!
The 4L60E automatic overdrive transmission has proven to be a workhorse for GM’s rear-wheel drive cars and trucks. Overdrive gears give vehicles better fuel economy when cruising at highway speeds. However, like any complex mechanical system, the 4L60E is prone to issues over its service life that can disrupt proper operation of overdrive. Main Causes …