Gears grinding shifting 07 jk 2dr
02-11-2019, 04:53 PM
#1
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Gears grinding shifting 07 jk 2dr
When shifting gears I'm getting grinding noise! Most of the time it doesn't it but sometimes when I shift reAl slow and go slow only 3rd will grind
02-11-2019, 06:28 PM
#2
JK Junkie
Generally speaking there are two possibilities: The clutch isn't fully disengaging or the synchros in the trans are not working well enough under the conditions at the time.
Test the clutch disengagement by slowly letting the clutch pedal up in sixth gear at a dead stop while watching the tach. When the tach just begins to drop, the clutch pedal should be about 2-3 inches off the floor. I didn't look up the spec, it's approximate, the important point being that there is a significant distance that the clutch gets disengaged beyond where it appears to engage.
On the transmission side of this problem, the synchros can be affected lubricant age/type. Suggest changing the oil with the proper manual trans fluid, preferably a full synthetic (especially in cold winter weather).
You wrote about shifting slowly when it happens. In my experience with manual transmission shifting, there's too slow, too fast, and everything in between is just right. Unless the clutch isn't disengaging, suggest changing the oil and not shifting real slow.
Stay in touch, interested to hear back.
Test the clutch disengagement by slowly letting the clutch pedal up in sixth gear at a dead stop while watching the tach. When the tach just begins to drop, the clutch pedal should be about 2-3 inches off the floor. I didn't look up the spec, it's approximate, the important point being that there is a significant distance that the clutch gets disengaged beyond where it appears to engage.
On the transmission side of this problem, the synchros can be affected lubricant age/type. Suggest changing the oil with the proper manual trans fluid, preferably a full synthetic (especially in cold winter weather).
You wrote about shifting slowly when it happens. In my experience with manual transmission shifting, there's too slow, too fast, and everything in between is just right. Unless the clutch isn't disengaging, suggest changing the oil and not shifting real slow.
Stay in touch, interested to hear back.
Last edited by Mr.T; 02-11-2019 at 06:34 PM.