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Old 06-08-2023, 07:08 PM   #11 (permalink)
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ND Miata - '15 Mazda MX-5 Special Package
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I'm not going to say you're wrong, and your experience shows the something has changed or been damaged.

There are no oilers in Honda manual transmissions. There's no pump, nothing runs off the input shaft. It's just a box of gears sitting in an oil bath. They're dead simple.

What might have happened is, the synchros might be getting worn. The larger the RPM difference when shifting, the more work the synchros need to do. An engine not spinning creates a larger difference between input and output shaft, but in practice it's the same as if you revved the engine 6-800rpm higher before shifting. You're also likely shifting more frequently.

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Old 06-09-2023, 12:59 PM   #12 (permalink)
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Really, no oilers? Interesting. I typically rev match when shifting from neutral into gear. I wonder what could have happened then. Iíll try to look at the fluid again and see if anything is different.
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Old 06-09-2023, 01:03 PM   #13 (permalink)
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Oh, I also had to replace my brake master cylinder after engine off cruising and using the brake too much. Probably avoidable if I was more careful, but it started leaking after being on the brake too much with the engine off. I was still figuring out hypermiling. I saved a small amount of fuel but it costed me more in damage and repairs.
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Old 06-09-2023, 05:11 PM   #14 (permalink)
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ND Miata - '15 Mazda MX-5 Special Package
90 day: 39.06 mpg (US)

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Thanks: 2,804
Thanked 2,428 Times in 1,504 Posts
This isn't a D series gearbox, it's a K, but they're essentially the same.

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