Whining in reveres .

[Nexstar7]

Goodmorning everyone. I have 2020 gladiator. Is it common to hear a whining noise moving in reverse? Thanks

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[Mojave Nunzio]

I have a 2022 and mine does it also when I back up and from what i have read it is common.

 

[ZoMojave]

Yup. Me too!

 

[XJFanatic]

Me three! Most noticeable when cold though.

Oddly don’t think I have ever heard my JLU with the same transmission do it. Sometimes I almost feel like it alternator whine…

 

[Jeeperjamie]

My 2010 Jeep Wrangler JKU did it and so does my 2020 JT. I hear it more in the colder weather but if I listen closely when it's warm it's still there. Don't think it's a huge issue honestly. I've never been in a Jeep Wrangler or Jeep Gladiator made after 2007 that didn't do it

 

[Nexstar7]

I have a 2022 and mine does it also when I back up and from what i have read it is common.

Thanks bro

 

[Lunentucker]

Mine has a whining noise everytime my wife rides with me.

 

[OHverland]

My 4 year old says it sounds like a ghost. Now I can't unhear it.

 

[Rusty PW]

Mine has a whining noise everytime my wife rides with me.

That's my speed limiter going off. The right seat whines.

 

[MikeInMo]

My 4 year old says it sounds like a ghost. Now I can't unhear it.

I was coming here to say that. It's just the ghost.

 

[Broccoli]

My girlfriend whines when she backs up on it…

 

[dcmdon]

Reverse gears are generally not helical cut. So the straight cut gears make a whining sound.

I'm not sure if this is the case with out Jeeps. But its why it has always generally been the case.

 

[Randonexplosion]

My diesel doesnt do it but me and the wife always joke about the ghost in her Mojave

 

[Zero_Accel]

Reverse gears are generally not helical cut. So the straight cut gears make a whining sound.

I'm not sure if this is the case with out Jeeps. But its why it has always generally been the case.

Dang, beat me to it!

Like @dcmdon said, it's the fact that the reverse gear is not helical cut, so they whine when in operation, completely normal.

In fact, nearly every modern vehicle uses straight cut gears for reverse for one reason, it's just straight up cheaper to make these gears, the only thing stopping automakers using straight cut gears in the whole transmission is due to the excessive noise. Since the noise is only present in reverse, a relatively short time driving, and quieter at lower speeds it's not an issue. It's also a nice audio queue that you're moving backwards.

Fun fact, straight cut gears are also much stronger than helical gears, so they are used in racing, BUT like I said, they make noise when in use, and they only GET LOUDER the faster you go. Here's the straight cut gearbox in the (extremely rare) BMW E36 M3 GTR. This car was basically a racecar that you could purchase straight from BMW, and let's just say I don't believe they would make great daily drivers.

At least it makes incredible sounds!

 

[JTBurns]

Dang, beat me to it!

Like @dcmdon said, it's the fact that the reverse gear is not helical cut, so they whine when in operation, completely normal.

In fact, nearly every modern vehicle uses straight cut gears for reverse for one reason, it's just straight up cheaper to make these gears, the only thing stopping automakers using straight cut gears in the whole transmission is due to the excessive noise. Since the noise is only present in reverse, a relatively short time driving, and quieter at lower speeds it's not an issue. It's also a nice audio queue that you're moving backwards.

Fun fact, straight cut gears are also much stronger than helical gears, so they are used in racing, BUT like I said, they make noise when in use, and they only GET LOUDER the faster you go. Here's the straight cut gearbox in the (extremely rare) BMW E36 M3 GTR. This car was basically a racecar that you could purchase straight from BMW, and let's just say I don't believe they would make great daily drivers.

At least it makes incredible sounds!

Wow that sounds and looks like so much fun!

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