Transmission fluid or syncro?

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
S13 KID
Posts: 135
Joined: Tue Jan 13, 2009 5:04 am
Car: 91 240SX S13

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Ok when im shifting into 3rd gear pushing the clutch more than half way down(Like I always do) at LOW RPMS'S 3rd gear feels fine... But...

When Im shifting at high rpm's into 3rd I get grinding(sometimes...not all)

Could this be the need or a transmission fluid change or are the 3rd gear syncro going out?

*Keep in mind that at low rpm's Shifting into 3rd is a breeze*


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glitched
Posts: 1860
Joined: Fri Jun 25, 2004 8:20 am
Car: 1992 240sx se
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I had a similar symptoms, and replacing my trans fluid with red line synthetic ( a couple of times actually) still have the grind.

Just take an extra second to shift to 3rd. I've dealt with it for years now and i just dont worry about it anymore.

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cleopp3
Posts: 74
Joined: Mon Mar 17, 2008 6:52 am
Car: 93 nissan 240sx

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should mos def change the fluid if you havent already. yet if its always grinding in 3rd chances are syncroz, precious metals in there get damaged after low fluid levels or wrong fluid.

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mattblancarte
Posts: 1978
Joined: Sat Jun 21, 2008 4:14 pm
Car: 2005 BMW M3 Comp. Coupe

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Double-clutch into that gear if it doesn't get better with a fluid change.

greencar
Posts: 124
Joined: Mon Mar 19, 2007 6:57 pm
Car: 1992 240sx se

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What synth lube are you running? Mine grinded in third, and popped out a gear a few times at low RPM after a fresh fluid change. I went with Redline MT-90 and the problems went away!

HTH

-Dan

lrb_2000
Posts: 2854
Joined: Tue May 03, 2005 6:41 pm
Car: '91 Nissan KA-T hatch
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Same here. Changed to mt-90 and it stopped grinding 3rd.

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miracleboi123
Posts: 143
Joined: Fri Nov 21, 2008 5:27 pm
Car: 93 s13 coupe

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i used royal purple's synchromax and it got rid of my grinds.


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