stock64

I have 2014 with 5300 miles with a first time glitch that happened twice last weekend.
I went from reverse to 1st gear, all indicators did show I was in first gear, (dash indicator showing 1st gear, backup lights went out and reverse camera went out) but when I let out the clutch I was still in reverse. Both times this happened I was facing up on an incline, about 30 degrees, and both times I had to turn the ignition off and restart to get it to actually go into 1st gear. This has not happened before and has been fine since this weekend.
My dealer's service department has no idea what could have happened.
I have an appointment for next week to look it over.
Has anyone experienced an issue like this?

runutzzzzz

Not going to say it's impossible but that's impossible?

First is on the complete opposite side of the gates.

If you're on a steep incline I bet you were rolling back (HSA didn't kick in) and you thought you had the clutch out enough to grab but you didn't. You panicked, stepped on the brake, restarted the car and then HSA kicked in and you thought your car was back to normal.

Just a guess...

stock64

No I was in reverse for sure. As I let the clutch out it was not a roll back, I was going backwards under power. I have no idea with a manual that there is any computer control. I have had manual transmissions on all of my vets and this is a first for me.
I asked if hill assist had any influence other than brakes. They were not sure at the service dept.

runutzzzzz

It's all mechanically controlled by you. Maybe someone that knows about the 7 Spd can chime in. Maybe 1st and Reverse are on the same set?

Even if that was the case, a power cycle wouldn't pop it out of reverse.

I have a feeling your dealership is going to tell you "No Problems Found - Operates as intended"

stock64

I should add that it was more than 1 attempt to go forward.
I stopped, while in 1st and tried a second time. I have never had a hill assist feature and have driven manual trans forever.
I will just have to see what happens -- it makes no sense to me.

jerryv

That's a very strange problem. As far as I know, the only computer control in the tranny is the 1-4 shift gate .. but it's just your basic manual transmission in most regards. I suspect the gear indicator and rear-view camera use sensors on the shift lever ... makes me wonder if there's a problem with the shift linkage .. I'd definitely take it to the dealer ..

TEXHAWK0

The shifter is mechanically linked to the transmission, so I do not see any way the shift lever could move to the first position and the transmission still be in reverse. If the shifter rod came loose, then you would not be able to get into any gear.

thrilled

I agree.I don't see anyway it's possible.It's all mechanical.
Take A look at the insides of A manual transmission.I say again I don't
See how it's possible.Maybe A problem with the linkage from maybe 1st to
3rd .but in A 7 speed,I just don't see how.To many gears.

jagamajajaran

CCHAPPEL

I have experienced exactly what you describe a couple time on my new ZO6 w 500 miles. Rolling back on a decline in reverse, went to 1st and all indications were in 1st, but car in reverse when I let off clutch.

OVERULD

Never eperienced it on my M7 but interested in what the Forum will yield on this one!



BJ

thrilled

I've never experienced it either.I'm not saying that it can't happen.
I know when I go from reverse to 1st sometimes the rear camera will stay
On for A couple of seconds when I'm in 1st.No big deal.
I believe the dealership is going to be stumped.
Keep us informed.

meyerweb

That IS as designed. It's called out in the manual.

But the OP's problem certainly is odd. I've disassembled (and managed to reassemble) a couple of manual trannies, and don't know how this could happen. But I've never opened up of C7's 7M, so I won't claim any expertise there.

johnnypro

Impossibruuu!!!

With that said, this is the kind of thing that demands a video. It sounds so ridiculous it's impossible for anyone to take it seriously on words alone, but if you caught it on tape it'd be seriously eye opening!

Larry/car

Thinking that the gear change hung up and even though the mechanical selection occurred the gear train didn't follow. Shutting down the engine released pressure on the gears and the selected gear was cycled. If we could study a schemetic possibly a cause would be readily available. Possible cause could be an improperly oil serviced transmission. Maintenance should check transmission fluid level.

WelderGuy

I doubt you were on a 30 degree incline. That's REALLY steep.



And I doubt you could tell the difference between rolling because of the hill or being under power in reverse on a really steep incline at low speed. You'd really have to be getting on the gas to accelerate faster downhill than gravity would do on its own. The transmission was really in first, but gravity was making you roll backwards so quickly that you thought you were in reverse under power.

The chance that the various interlocks on the shift rails in the transmission would allow that to happen and then function normally later are indistinguishable from zero.

I'm thinking operator error or reporting error for the time being.

Crossed Flags Fan

since this was originally posted almost a year ago and the OP never posted a follow up, I guess we'll never know what happened since then......