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Old 11-30-2013, 11:19 PM   #1
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downshift noise

I have a 6spd manual and have been noticing over the past few days that after going 30 MPH or more (2Hi) when I come to a stop light I hold in the clutch and just go through the motions of down shifting to first(keeping the clutch pushed in.) while the jeep is still in motion. I then hear a whining noise coming from the front of the jeep. This does not happen all of the time and I have no issues with acceleration or braking. I ask because I used my 4Hi for the first time during some bad ice and snow in the area and the noise did not happen before I used the 4 Hi. I am wondering if this is normal or something i should look into...

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Old 12-01-2013, 12:43 AM   #2
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I have a 6spd manual and have been noticing over the past few days that after going 30 MPH or more (2Hi) when I come to a stop light I hold in the clutch and just go through the motions of down shifting to first(keeping the clutch pushed in.) while the jeep is still in motion. I then hear a whining noise coming from the front of the jeep. This does not happen all of the time and I have no issues with acceleration or braking. I ask because I used my 4Hi for the first time during some bad ice and snow in the area and the noise did not happen before I used the 4 Hi. I am wondering if this is normal or something i should look into...
Why do you go down through the gears if you keep the clutch pressed in the whole time? There is no benefit to downshifting if you don't use the engine braking. You really should be letting the clutch out in each gear when slowing.

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Old 12-01-2013, 12:51 AM   #3
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you are hearing gear whine from first. never downshift to first when in motion. it is too short. you are putting serious wear on your 1/2 synchronizer for absolutely no reason.
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Old 12-01-2013, 12:53 AM   #4
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Holding the clutch in at lights and such is a bad practice and causes excessive wear on the throw out bearing. You might want to rethink this habbit.
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Old 12-01-2013, 06:55 AM   #5
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Holding the clutch in at lights and such is a bad practice and causes excessive wear on the throw out bearing. You might want to rethink this habbit.
This is the first time I had heard that, and I've been driving stick since I was a kid. Thanks for the tip!

and I do not downshift into first gear. Meaning I do not engine brake to first. the clutch is depressed the whole time.

still, back to the original question, what could be the cause of the occasional whine when I do shift it into first?
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Old 12-01-2013, 07:16 AM   #6
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This is the first time I had heard that, and I've been driving stick since I was a kid. Thanks for the tip! … and I do not downshift into first gear. Meaning I do not engine brake to first. the clutch is depressed the whole time. still, back to the original question, what could be the cause of the occasional whine when I do shift it into first?
If you're still moving, you shouldn't be going in to first at all. You're putting strain on the syncros and wearing them out prematurely. Depending on the speed you're going, you could be overspending the clutch disk. Even with the clutch in, everything from the clutch disk back is still being driven by the wheels. Don't go back to first gear until you're stopped and ready to start moving again.
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Old 12-01-2013, 07:47 AM   #7
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If you're still moving, you shouldn't be going in to first at all. You're putting strain on the syncros and wearing them out prematurely. Depending on the speed you're going, you could be overspending the clutch disk. Even with the clutch in, everything from the clutch disk back is still being driven by the wheels. Don't go back to first gear until you're stopped and ready to start moving again.
This is it. You've been driving a manual for awhile but a JK 6 spd is not like other American or foreign manuals. It's less forgiving, more cluncky and long throw but very durable. So, don't shift back to first pretty much unless you're at a stop. And, at a light put it in neutral and leave the clutch out. You're going to get some whine when in 4H and can get a lot of whine in 4L. That's normal. You mentioned that it happened for the first time after engaging 4H so I would say normal.
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Old 12-01-2013, 06:31 PM   #8
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This is it. You've been driving a manual for awhile but a JK 6 spd is not like other American or foreign manuals. It's less forgiving, more cluncky and long throw but very durable. So, don't shift back to first pretty much unless you're at a stop. And, at a light put it in neutral and leave the clutch out. You're going to get some whine when in 4H and can get a lot of whine in 4L. That's normal. You mentioned that it happened for the first time after engaging 4H so I would say normal.
cool! Thanks for the help! I'll keep an eye on it. I drove to and from work today as suggested (2Hi as before). I noticed the whine a little but not as pronounced. I think this is it. I'm used to the toyota manuals so this makes sense.
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Old 12-01-2013, 07:02 PM   #9
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you are hearing gear whine from first. never downshift to first when in motion. it is too short. you are putting serious wear on your 1/2 synchronizer for absolutely no reason.
yup true

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