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06-09-2023, 06:28 PM | #29 | |
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I've never been able to get my transmission to downshift into first really, except _maybe_ from 3-4mph, like right around where the car would lug in 2nd if I let it.
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06-09-2023, 07:49 PM | #30 |
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It's super weird that there's apparently such a wide variation, and so common. I'm also glad mine don't have that issue, lol.
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06-09-2023, 08:37 PM | #31 | |
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I saw this and all those, "what is this ball stuck to my drain plug?" threads made more sense.
https://www.jackstransmissions.com/t...ervice-brz-frs Quote:
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06-09-2023, 11:57 PM | #32 | |
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06-10-2023, 12:02 AM | #33 | ||
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edit: To clear up any doubt, here's a page from the service manual with the relevant IPB. Scroll to the bottom. It's called the "1st shift restrict ball."
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Last edited by Ultramaroon; 06-10-2023 at 12:30 AM. |
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06-10-2023, 09:22 AM | #34 |
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The location of that ball reinforces the importance of the oil.
On this transmission the 1/2 shift hub is on the layshaft, submerged when the car is parked, and very likely soaking wet with it's toes in the oil bath even when running and flinging oil around the case. If you've that OEM fill GL-3 goop in there that's a lot of jelly that little ball, and that shift ring and synchros have to push out, and a lot of warming up to do before it gets as smooth as a more high tech oil. |
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06-10-2023, 06:17 PM | #35 |
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Not specifically that ball, but yes. It's also the reason timing is especially critical for the cold 1-2 shift. That jelly quickly drags down the speed of the whole gear set anytime the trans is in neutral with the clutch disengaged.
Pro tip; shift with a quick gentle open-fingered flick from first to second without pausing in neutral. With good technique, even stone cold, it just falls into gear.
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06-10-2023, 08:55 PM | #36 | |
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06-10-2023, 11:13 PM | #37 | |
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my car definitely has a 1st gear lockout, as it won't fall in unless the revs are first matched or over-reved before the shift. but i've never double clutched. normally when i'm going 2-1 at anything other than a stop sign, it's at the upper limit of 1st, and i intend to rotate the rear around the corner(not always sideways, or skidding, many times just enough to roll the tires over). it's almost automatic at this point, but i'll rev-match 4-3-2, line up for the corner, then clutch-in, drop out of 2nd, rev up while holding towards 1st until it drops in, and then release the clutch(not pop) as it's falling into 1st... both of my early '14's operated the same. though as long as i'm under-reved for 1st, it will refuse to go in. i do wonder if it's my/your technique that's working around the mechanical 1st gear lockout, or there's enough clutch dragging to keep the input shaft spinning to follow the rpm jump. personal technique would make more sense, as we're both a sample size of 2 different transmissions operating the same way, and the odds of mass manufacturing skew against us. of note, i never down shift for the first mile-ish of use, the fluid is too cold, and nothing wants to work.
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06-11-2023, 12:51 AM | #38 | |
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I've driven a couple which were super easy to downshift into first, even without doing anything special to spin up the input side.
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06-11-2023, 01:59 AM | #39 | |
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06-11-2023, 03:02 AM | #40 |
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lol
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06-21-2023, 12:57 AM | #41 |
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I find that if I get the revs up to just over 4k after a cold start and shift 1st to 2nd it is a smooth shift. Generally lower rpms will make a crunching noise.
The difficulty shifting 3rd to 2nd after cold start is frustrating! |
06-21-2023, 12:59 AM | #42 |
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So is there a consensus on the best oil to use for the transmission?
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