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Old 12-06-2010, 09:53 AM   #1
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Accidental Gear Grinding

Okay for those of us who have a MT, most of us have had times where we accidentally grind a gear.

I did this on Friday by accident going from 5th to 6th.

In my infiniti, you have to press straight down on the shifter to slide it over to reverse so I can press the shifter in a "down and to the right" motion going from 5th to 6th with no problem.

Well, thats a habit I have to break w/the wrangler because I did this the other day and wound up grinding my gears for a second.

My question is, how bad is this for the car? I did it occasionaly on my old Sahara as well, and never had anything bad come from it.

So I want to know if occasionally grinding a gear is anything to be seriously concerned about?

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Old 12-06-2010, 09:58 AM   #2
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It usually chips a couple gears, depending on the QUALITY of the gears-

Now and then shouldn't be a problem and it depends on what gears your mis-mesh and how much "force" you've applied--pretty variable results

I never could grind any of ny Corvette gears, in the 4/5/6 spds, I think they were much better synchro sys-

JIMBO

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Old 12-06-2010, 10:09 AM   #3
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It usually chips a couple gears, depending on the QUALITY of the gears-

Now and then shouldn't be a problem and it depends on what gears your mis-mesh and how much "force" you've applied--pretty variable results

I never could grind any of ny Corvette gears, in the 4/5/6 spds, I think they were much better synchro sys-

JIMBO

Thats funny cause I never could get my C-4 off of dry pavement. I think Jeep has a much better 4x4 system.
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Old 12-06-2010, 10:10 AM   #4
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I have a hard time going into 3rd and reverse, they grind at least once a week, and I don't know why... I'm careful, but I haven't had a problem ... yet.
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Old 12-06-2010, 10:10 AM   #5
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how do you know if you've caused permanent damage by gear grinding?
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Old 12-06-2010, 10:14 AM   #6
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how do you know if you've caused permanent damage by gear grinding?
By taking part your transmission and inspecting it. Don't sweat it you're fine. You probably caused more damage by referring to your Jeep as a car.
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Old 12-06-2010, 10:17 AM   #7
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how do you know if you've caused permanent damage by gear grinding?
Well one way would be the absence of forward momentum (not trying to sound like a smart a$$) but if you REALLY screwed up your trans it would let you know. Another way to check would be to take a look at your trans fluid for LOTS of metallic flakes. The presence of A LOT of metal would be sign that things are not completely happy in there. However some is normal.

I REALLY wouldn't worry about it. Try to avoid it (obviously) but a buzz here and there is not out of the ordinary. Happens to the best of us.
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Old 12-06-2010, 10:17 AM   #8
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yea, my bad. i should probably edit that.

hypothetically speaking, if your transmission got jacked up from occasional gear grinding would it still be covered under the powertrain warranty?
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Old 12-06-2010, 10:20 AM   #9
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Negative. That would fall under abuse, which is not covered by any warranty.
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Old 12-06-2010, 10:26 AM   #10
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Negative. That would fall under abuse, which is not covered by any warranty.
okay thanks.

well that says to me that occasional gear grinding shouldn't be a real concern because if that fell under abuse and caused transmissions to fail, then chrysler would be rejecting warranty claims left and right.

i'm sure our jeeps are built well enough for things like this to happen occasionaly and not have our transmissions fail from occasional human error
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Old 12-06-2010, 10:30 AM   #11
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okay thanks.

well that says to me that occasional gear grinding shouldn't be a real concern because if that fell under abuse and caused transmissions to fail, then chrysler would be rejecting warranty claims left and right.

i'm sure our jeeps are built well enough for things like this to happen occasionaly and not have our transmissions fail from occasional human error
Agreed (Unless its a Peugeot BA10/5 from the 80's Jeeps) LOL

I'm sure your just fine!
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Old 12-06-2010, 10:32 AM   #12
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You know what they say...

If you can't find 'em, grind 'em

You're fine, everyone grinds the gears every once in a while. Over time it leads to extended wear, but the transmissions are built with the knowledge that they need to take a little abuse. I seem to grind gears all the time when someone else is in the car with me. Talk about being a nervous driver
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Old 12-06-2010, 11:18 AM   #13
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In the manufacturing world, it's known as "deburring".
don't sweat it
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Old 12-06-2010, 11:57 AM   #14
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Happens to everybody and is anticipated by the manufacturer. I've done it once or twice.

If you've got a manual, you're going to grind and stall sometimes. At the end of the day, just remember that you're a better person than everybody with the automatics. (I kid, I kid. )
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Old 12-06-2010, 01:25 PM   #15
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Occasionally I'll skip gears. When I go from 4th to 6th I've been known to push it a little hard and end up in the reverse lane on the shifter. As soon as you put even the slightest pressure to put it in gear.....GRIND. Luckily the engineers must have...in their infinite wisdom....ALL HAIL THE ENGINEERS!....made it very difficult to put it in reverse whilst moving forward. That is all I need is the wee reminder and I'm back in neutral searching around for what I did with a Steve Erkel "DID I DO THAT?". Lately, as soon as I feel the detente I know I went too far and haven't done that trick in some time. I've driven standards for over 30 years and have ground enough coffee to make a significant number of pots...but at this point I don't worry about it because it never has amounted to a hill of beans (pun intended ).
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Old 12-06-2010, 01:28 PM   #16
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just be glad it doesn't grind any time you take less than 10 seconds to shift...
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Old 12-06-2010, 01:31 PM   #17
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just be glad it doesn't grind any time you take less than 10 seconds to shift...
? yours does i'm assuming?
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Old 12-06-2010, 01:54 PM   #18
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His doesn't look to be a JK and probably has a lot more miles on it than most JKs...I'm guessing.
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Old 12-06-2010, 02:20 PM   #19
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? yours does i'm assuming?
Hell mine does on cold morninings if I don't double clutch
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Old 12-07-2010, 09:52 PM   #20
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Cold mornings are a beeeotch. Had this problem often with my 2005 GTO. A tip alot of owners had for the M6 GTO trans was replace their stock fluid with Royal Purple. This is something I did with great results (less noise/heat/gear clash)...Also did this with my Harley Davidson. Royal Purple is good stuff. Have not tried it with the Rubicon yet but I will after 15k.
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Old 12-07-2010, 11:35 PM   #21
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I wouldn't try it in the Rubi. That's why my tranny is messed up. I ran Royal Purple Syncromax for 10k miles and now my syncros are messed up.
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Old 12-12-2010, 01:14 PM   #22
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Like JK'N said been driving manual tranny's for over 30 years and a little grinding makes you mad, makes you laugh, and makes you go "dumb ass" and then go on your way but I've never had it hurt the tranny. I did the same with my 09 X not hitting reverse when looking for 6th took a little getting used to.
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Old 12-12-2010, 01:23 PM   #23
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The manual transmission here has NO reverse lock out.. hence be careful to go from 5th into 6th.. DON'T apply any outward pressure whilst shifting just let the shift lever follow the natural flow/track.
An occasional grind will not damage the gear teeth.. It will only rub the nose of the coupler dog teeth..(They are designed to take some abuse..)

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