What would make a 4L60E only operate in reverse? I just had to tow a truck like this one to the mechanic. Curious as to what the issue might be.

Illustration for article titled Calling mechanicoppos

**Insert rant while I’m at it: Naturally the owner of the truck kept his brakes on the entire way... yeah I get “taking up the slack” but (a) you don’t need that under acceleration, (b) you only need mild brakes while trying to maintain speed and (c) this guy treats both pedals like a switch. So the brakes were on good and proper. My truck is rated to tow 6,000lbs... I don’t know what 5,000lbs of truck, toolbox and driver + heavy brakes equates to but it felt like a lot.**

So what caused this?

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