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Old 02-24-2018, 07:25 PM   #1
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CB7_Saloon is cool... so far.
Gearbox oil

Ok, so I know these gearboxes use 10W-30 oil for the gearbox, however, a few months back when i pulled the sedan's motor, I recall the gearbox having actual gear oil in it (I could tell from that putrid smell). I didnt seem to have any issues with it (shifts like butter). My question is would it be safe/beneficial to run it again with the gear oil or should I just put the 10W-30 in?
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Old 02-24-2018, 07:50 PM   #2
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The only negative effect I can think of besides the smell would be gas mileage. Since gear oil is so much thicker than regular engine oil, that introduces quite a bit of parasitic drag into the system. If you do change to 10W-30, you'll probably have to flush the system a couple times to 'wash' out most of the gear oil.
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Old 02-24-2018, 07:58 PM   #3
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I got about 400 a tank I think, which is a little better than what my coupe is getting now. I dont have the money to do a flush since im paying to have the clutch done, but i also dont plan on rocking whats in her bay for longer than a year (gonna be doing a Turbo build, which includes gearbox build)
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Old 02-24-2018, 10:35 PM   #4
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fleetw00d is very helpful fleetw00d is very helpful
Change it after driving it a long distance so it is as warm as possible so it drains better. I always use Honda manual transmission fluid.
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Old 02-25-2018, 01:08 PM   #5
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10w30 is fine. A lot of people here also like Syncromesh. Or like fleetwood said Honta MTF. All will work fine in a daily
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Old 02-27-2018, 06:13 PM   #6
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Just use syncromesh especially if you are having problems getting into gear
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