No Forward Gear

Tech1451 · March 2, 2016

Just wanted to put this out there incase anyone else may have run into the same issue.

My truck is a 2014 5.3 single cab bought in May of 2014. It's got 8300 miles and is garage kept. I backed into the garage the other day and set the parking brake, as usual. I went out the next morning, started the truck and released the parking brake. Put it in gear and discovered it would not go into forward gear. Tried drive and then down into manual with no luck. I put the truck in neutral and it would move by rolling it. I then put it into reverse and the reverse gear would engage. Tried forward gear again and nothing.

Called the dealer and arranged for a tow. Once at the shop, I got the dreaded 'could not duplicate' call. They wanted to keep it a few days to see what it would do. I was called the next day and told there were no codes but it has not acted up since. I was also informed the tech did not want to let it go as he felt it might be unsafe if it happened again. The day after that I wastold they were going to go ahead and replaced the TCM.

Not complaining, just posting incase anyone else begins to experience this condition. Its been a week now and still haven't got it back.

tnchevy · March 2, 2016

Well that just plane ol' sucks! Keep us updated.

joshc64311 · March 2, 2016

Mine did this 3 time now but only going downhill while off the gas. Do you have a tune? My dealership said the same thing

pm26 · March 3, 2016

Check the transmission shifting linkage. Something is loose somewhere or some bushing is bad.

joshc64311 · March 3, 2016

Thanks I'll check it out. Do you know what side it is on?

TJay74 · March 3, 2016

Check the transmission shifting linkage. Something is loose somewhere or some bushing is bad.

If it went into reverse but wouldn't go into drive that would not be a shift linkage issue, heck I would be surprised if there is even a shift linkage on the 6L80E since it is a clutch to clutch transmission and is all electronically shifted.