grinding gears
09-09-2014, 01:25 PM
#2
It would help a lot to know what you are driving, what mods you have, and how fast you consider "fast." (speed of shift as well as RPM at which you are shifting)
Here is how I make sure the clutch is fully disengaging.. press clutch in all the way, put shift lever in 4th gear to stop all rotation. Then put it back in neutral with clutch still pressed all the way in. Rev to 1000RPM or so for 10 seconds and then gently sneak the stick into reverse(keep clutch pressed in the WHOLE TIME). If it goes right in, you are good. If you hear any grinding or noise and it doesn't go in, your clutch is dragging or pilot bearing/bushing or similar might be binding a bit. Once you have eliminated clutch adjustment as an issue, then look at transmission.
When was the last time you checked/changed your transmission fluid? This can have a large effect on shifting, especially at high RPMs. Make sure you use GOOD stuff and the appropriate friction modifier(s) if applicable. IMO, newer transmissions use fluids that like to be changed more often. Used to be the thick, sludgy gear oil would last almost forever in older transmissions.
Beyond that, you may have worn synchros.
Good luck.
Here is how I make sure the clutch is fully disengaging.. press clutch in all the way, put shift lever in 4th gear to stop all rotation. Then put it back in neutral with clutch still pressed all the way in. Rev to 1000RPM or so for 10 seconds and then gently sneak the stick into reverse(keep clutch pressed in the WHOLE TIME). If it goes right in, you are good. If you hear any grinding or noise and it doesn't go in, your clutch is dragging or pilot bearing/bushing or similar might be binding a bit. Once you have eliminated clutch adjustment as an issue, then look at transmission.
When was the last time you checked/changed your transmission fluid? This can have a large effect on shifting, especially at high RPMs. Make sure you use GOOD stuff and the appropriate friction modifier(s) if applicable. IMO, newer transmissions use fluids that like to be changed more often. Used to be the thick, sludgy gear oil would last almost forever in older transmissions.
Beyond that, you may have worn synchros.
Good luck.
09-09-2014, 01:41 PM
#3
TECH Fanatic
Also if the problem persist get it rebuild ASAP, continuing to drive it will tare up more parts and it can get really expensive when that happens.
Also almost forgot this isn't a internal engine question, there is a manual transmission forum for these questions.
Last edited by Fry_; 09-09-2014 at 01:47 PM.
09-09-2014, 02:49 PM
#4
It would help a lot to know what you are driving, what mods you have, and how fast you consider "fast." (speed of shift as well as RPM at which you are shifting)
Here is how I make sure the clutch is fully disengaging.. press clutch in all the way, put shift lever in 4th gear to stop all rotation. Then put it back in neutral with clutch still pressed all the way in. Rev to 1000RPM or so for 10 seconds and then gently sneak the stick into reverse(keep clutch pressed in the WHOLE TIME). If it goes right in, you are good. If you hear any grinding or noise and it doesn't go in, your clutch is dragging or pilot bearing/bushing or similar might be binding a bit. Once you have eliminated clutch adjustment as an issue, then look at transmission.
When was the last time you checked/changed your transmission fluid? This can have a large effect on shifting, especially at high RPMs. Make sure you use GOOD stuff and the appropriate friction modifier(s) if applicable. IMO, newer transmissions use fluids that like to be changed more often. Used to be the thick, sludgy gear oil would last almost forever in older transmissions.
Beyond that, you may have worn synchros.
Good luck.
Here is how I make sure the clutch is fully disengaging.. press clutch in all the way, put shift lever in 4th gear to stop all rotation. Then put it back in neutral with clutch still pressed all the way in. Rev to 1000RPM or so for 10 seconds and then gently sneak the stick into reverse(keep clutch pressed in the WHOLE TIME). If it goes right in, you are good. If you hear any grinding or noise and it doesn't go in, your clutch is dragging or pilot bearing/bushing or similar might be binding a bit. Once you have eliminated clutch adjustment as an issue, then look at transmission.
When was the last time you checked/changed your transmission fluid? This can have a large effect on shifting, especially at high RPMs. Make sure you use GOOD stuff and the appropriate friction modifier(s) if applicable. IMO, newer transmissions use fluids that like to be changed more often. Used to be the thick, sludgy gear oil would last almost forever in older transmissions.
Beyond that, you may have worn synchros.
Good luck.
09-09-2014, 06:38 PM
#5
YES folks, another one. Vlad, this is the INTERNAL ENGINE section, not the manual transmission section.
Take it over here guys: https://ls1tech.com/forums/manual-transmission-14/
09-09-2014, 10:08 PM
#6
TECH Fanatic
05-04-2016, 08:47 PM
#7
Austin6969 welcome to LS1tech!
I've moved this into the manual trans section.
Austin, have a look here: https://ls1tech.com/forums/generatio...g-threads.html
I've moved this into the manual trans section.
Austin, have a look here: https://ls1tech.com/forums/generatio...g-threads.html
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05-05-2016, 11:10 AM
#8
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I just bought a 96 chevy s10 with the 4 cyle. It grinds in all gears it shifts just fine but its grind all the time wile driving like it grind when someone would grind the gears when shifting can help me figure this out