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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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08-11-2019, 09:17 PM | #1 |
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Manual transmission improvements 2017+
For the 2017+ models, was there internal changes to the manual transmissions that alleviated some of the common gear change grinding issues of previous years?
Can anyone physically confirm this? If this is true, has anyone done a swap into an older car without interchangeability issues? |
08-11-2019, 10:25 PM | #2 |
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Page 89
"Manual transmission Applicable marketsNorth America Japan C h i n a Australia Europe Generic (refer to Chapter 2 "Model Variations" for details on the specifications available within each market) Applicable to: 6MT models Durability of the 6MT has been increased following the higher engine power output of models for North America, Japan and Australia. Changed shot peening of 6th gear. Added honing to the 6th gear teeth face. (1) 6th driven gear (2) 6th drive gear" Still rated at 250nm
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08-12-2019, 12:57 AM | #3 | |
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08-12-2019, 03:24 PM | #4 |
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08-12-2019, 03:32 PM | #5 |
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"grinding" as in notchy shifts or are you missing the shift and the lever rattles like a mofo since it isn't fully in the gate? the former is normal operation and the latter usually depends on your shifting technique and won't change with a new 86 gearbox..
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08-12-2019, 03:44 PM | #6 | |
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They added shot peening to the 6th gear cog? Because the massive torque of the FA20 was snapping teeth off of 6th gear?
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08-12-2019, 04:23 PM | #7 |
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Agree. This is definitely driver mod.
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08-12-2019, 04:30 PM | #8 |
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I have the '13 and my gears never grind unless it is my fault. Been driving it for 6 years+ now. As far as I know the only thing that changed is the gear ratio.
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08-12-2019, 06:00 PM | #9 |
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Because people cannot drive and would lug around town in 6th at low speed.
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08-12-2019, 06:06 PM | #10 |
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Does this mean the 2017 diff got beefed up too?
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08-12-2019, 06:13 PM | #11 |
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I have a 17+ and just recently the high rpm shifter rattle began - 13k miles.
I also had some grinding going into 4th above 6.5k rpms last weekend on a canyon road for about 30 minutes. Really weird as it was definitely not me, I tried it a bunch of different ways and there was a crunch no matter how I shifted if it was into 4th and above 6.5k rpms. Then it suddenly stopped doing it and hasn't come back. |
08-12-2019, 06:14 PM | #12 |
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Negative red leader, the front diff mounts were changed though
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08-13-2019, 02:34 AM | #13 | |
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Well I should have been more specific on the "issue". It's the 3-4 shift thats a known weak link but I have heard complaints of other gears. There is a thrust problem and over extension in 4th. The aftermarket makes a fork to replace the stock one for a reason. Mine lasted a long time without an issue and yes, I beat it like a red headed step child, so i'm not blaming Toyobaru. |
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08-13-2019, 02:43 AM | #14 | |
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I thought the upgraded fork was because the OEM fork failed when using heavier clutch packs I've had neither issue, as yet, so I cannot say for sure
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