Reverse while moving forward slightly?
Thread Starter
Pro
Joined: Jan 2019
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From: Tallahassee, Florida
Reverse while moving forward slightly?
Some cars will allow you to engage reverse while moving forward slightly (< 5 mph). This is somewhat useful if you do a lot of back-in parking or three-point turns.
I've personally experienced this with my previous E36 and E46 BMWs (My S197 Mustang may have allowed it, too, but I can't remember.). However, my recent Honda would grind if I attempted to engage reverse if there was any forward motion.
Does the C6 permit this?
Even if cars do allow reverse to engage without any drama while moving forward slightly, is it bad to do?
Thank you!
I've personally experienced this with my previous E36 and E46 BMWs (My S197 Mustang may have allowed it, too, but I can't remember.). However, my recent Honda would grind if I attempted to engage reverse if there was any forward motion.
Does the C6 permit this?
Even if cars do allow reverse to engage without any drama while moving forward slightly, is it bad to do?
Thank you!
Last edited by KingCorvette93; Jan 28, 2019 at 05:44 AM.
Burning Brakes
Joined: Sep 2012
Posts: 988
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From: Marietta GA
I can't speak for the Automatic, but on the M6, the solenoid will not open the reverse gate if you are moving forward so you cannot shift into Reverse until that gate opens up. It is pretty close to 5th gear and they don't want that mistake to happen.
Le Mans Master
Joined: Dec 2004
Posts: 5,493
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From: West coast CA
Your Honda grinds when selecting reverse while moving because it has conventional straight-cut reverse gears.
A manual transmission C6 has a synchronized reverse, which would allow selection while moving, so it is also equipped with an electronic lockout that blocks reverse unless you're stopped.
A manual transmission C6 has a synchronized reverse, which would allow selection while moving, so it is also equipped with an electronic lockout that blocks reverse unless you're stopped.
Thread Starter
Pro
Joined: Jan 2019
Posts: 558
Likes: 83
From: Tallahassee, Florida
Your Honda grinds when selecting reverse while moving because it has conventional straight-cut reverse gears.
A manual transmission C6 has a synchronized reverse, which would allow selection while moving, so it is also equipped with an electronic lockout that blocks reverse unless you're stopped.
A manual transmission C6 has a synchronized reverse, which would allow selection while moving, so it is also equipped with an electronic lockout that blocks reverse unless you're stopped.
Why does Honda use a straight cut reverse gear?
Will the Corvette reverse lockout prevent engaging reverse even at very low speeds (< 5 mph)?
Le Mans Master
Joined: Dec 2004
Posts: 5,493
Likes: 809
From: West coast CA
The Tremec in the C6 has a fully-synchronized reverse. The mechanism is more complicated, but it's easier and smoother to select. The danger is that it's theoretically possible to get it into reverse at 25mph which will lead to trouble. That's why it has the electronic lockout. I think the lockout might let you do 1 or 2 mph.
Selecting reverse while you're still going forward will cause more synchro wear, and releasing the clutch while you're still going forward will cause more clutch wear. You're just using the gearbox as a brake, which is a task better suited to the brakes. What's the point? You have to pass through 0 mph anyway before you can back up.
Thread Starter
Pro
Joined: Jan 2019
Posts: 558
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From: Tallahassee, Florida
Most cars, like the Honda, have a reverse mechanism that involves sliding a straight-cut spur gear into mesh. The main advantage is simplicity. The downsides are that it can crunch if you don't pause before selecting, and sometimes it won't go in, and it whines when you back up.
The Tremec in the C6 has a fully-synchronized reverse. The mechanism is more complicated, but it's easier and smoother to select. The danger is that it's theoretically possible to get it into reverse at 25mph which will lead to trouble. That's why it has the electronic lockout. I think the lockout might let you do 1 or 2 mph.
Selecting reverse while you're still going forward will cause more synchro wear, and releasing the clutch while you're still going forward will cause more clutch wear. You're just using the gearbox as a brake, which is a task better suited to the brakes. What's the point? You have to pass through 0 mph anyway before you can back up.
The Tremec in the C6 has a fully-synchronized reverse. The mechanism is more complicated, but it's easier and smoother to select. The danger is that it's theoretically possible to get it into reverse at 25mph which will lead to trouble. That's why it has the electronic lockout. I think the lockout might let you do 1 or 2 mph.
Selecting reverse while you're still going forward will cause more synchro wear, and releasing the clutch while you're still going forward will cause more clutch wear. You're just using the gearbox as a brake, which is a task better suited to the brakes. What's the point? You have to pass through 0 mph anyway before you can back up.
Last edited by KingCorvette93; Jan 28, 2019 at 12:21 PM.
