Gear grinds at high revs when changing from 2nd to 3rd
when accelerating through the gears gear change from 2nd to 3rd has a grind noise when putting into 3rd ,, this only happens when accelerating or at high revs not when slow driving ,, it happens with other people driving the car so its not just me
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check and/or change the transmission oil. Clutch problems are noticeable in 1st and reverse but as all the rest are syncro controlled you really do not need to use the clutch to change them. just get the engine rpms to match road speed and they will slip in. I am thinking a oil viscosity problem because of the colder weather.
Sounds like you have a bad shifter or a bad slave cylinder. Check the fluid in the reservoir and if you're losing some, then you need to see where the leak is coming from. If it's at the slave cylinder, you're in for an expensive repiar.
The 3rd Gear Synchro is worn or damaged, which is why it grinds when you try to upshift or downshift into 3rd gear. When it goes out completely you will have a very hard time shifting into 3rd gear, since the Synchro lines up the gears to make shifts smooth and easy.
first of all you shouldn't be reving that high to change gears. that's too high. secondly if it's grinding only during the change from 1st to 2nd gear you may have a problem with the gears not being aligned anymore...ie synchronizers worn out, bearings worn out, etc. take to reputable transmission shop to get it diagnosed and repaired. it sounds like the synchronizers are a problem there. and you may have metal in your fluid now that it's been grinding which will affect the rest of the transmission. if you are speed shifting as in racing, you are not doing your transmission any good. you probably don't have a transmission built to do that if it's the original factory tranny... meaning you did a major NO NO to your tranny and are tearing it up speed shifting when it isn't built for racing.