SKU: 48169042366
gears codes

gears codes 3rd Drive Gear TY856 6MT Ratio 1.521

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Description

gears codes 3rd Drive Gear TY856 6MT Ratio 1.5213rd drive gear for 6 speed manual transmissions with trans ID codes starting with "TY856". This is one of the two taller (longer) 3rd gear ratios used by Subaru for USDM STI MY07 18, Legacy Spec B, and Forester STI. It is also used in our RST F145Kit (2nd 6th long ratio) gear set with REM. Optional REM ISF (superfinishing) treatment. ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby

3rd drive gear for 6-speed manual transmissions with trans ID codes starting with "TY856".  This is one of the two taller (longer) 3rd gear ratios used by Subaru for USDM STI MY07-18, Legacy Spec B, and Forester STI.  It is also used in our RST-F145Kit (2nd-6th long ratio) gear set with REM.

Optional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive & driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.

Gears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.

Other possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and/or lack of lubrication.

Gear Ratio: 1.521

Tooth Count: 23

Manufacturer Part Nos:

  • 32275AA560 (USDM STI MY07-18, Forester STI) ... 4 hole gear type - MY01-06 requires updating synchronizer.
  • 32275AA590 (Legacy Spec B)
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SKU: 48169042366

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Amazon Customer
Charlottesville, US
★★★★★ 5
Thanks Jeeves!
Size: 11, Color: Raven/Quiet Shade/Ivory
They look and fit very nice! Perfect for around the mansion or the yacht club lol.
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Reviewed in the United States on March 25, 2026
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Honest Opinion
Phoenix, US
★★★★★ 4
Poor footbed but otherwise good.
Size: 10, Color: British Tan/Dark Chocolate/Natural
Comfortable. Replaced mediocre footbed that has no arch support with something else and it is now great. True to size.
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Reviewed in the United States on April 16, 2026
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AFRugger
Port Orchard, US
★★★★★ 5
A notebook that stands up extremely well to bad weather and harsh working conditions
Color: Tan, Size: 1 Pack
Now that I've used this notebook, I can't see myself using any other kind. I travel a lot and need a notebook with me at all times. That means the notebook I have with me is going to get wet frequently and take a beating in my pocket. This notebook is perfect. Rain/sweat have no effect on my written notes or my ability to write. The pages are thick which prevents tearing. The cover and binding are quite sturdy, rather than getting bent like cheaper notebooks. At 4x6 inches this fits in my cargo pocket without a problem and gives me plenty of writing space. If you are going to carry the notebook in your front pocket I'd suggest the smaller 3x5 version. The ruler on the back page was not something I thought about but has come in handy several times. No, this is certainly not the cheapest notebook available, but it is a reasonable price for a high quality product. If you are using this for field work, it is probably worth the cost. My work notes are certainly more valuable to me than the couple extra bucks spent. And really, how often do you fill up a notebook? I only go through one every month or two so it's not very costly. You cannot use gel type pens with this notebook, only normal ballpoint pens or pencils. I suggest using a Fisher Space Pen, it works very well with this notebook (also available on Amazon Prime for under $10)
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Reviewed in the United States on May 31, 2016
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MWC
Charlottesville, US
★★★★★ 5
Wet proof is great
Color: Blue, Size: 6 Pack
As a nurse, I am able to put this in my scrub pocket and make notes as I go along. I also write down my patients' meds so I can refer to it when the computer is not available or not with me. Since it is wet proof I can sanitize it when (and not if) it gets something on it. I use a ballpoint pen and have used a pencil and none of my writing gets smeared or erased by the disinfectant wipes. Since I have these books stored securely in my locker if something comes up in the future with someone I can refer back to them for answers not found in the chart. I use my book when I am giving shift report which is very helpful when I have to tell the know-it-all nurse every little detail because she wants to eat breakfast instead of reading orders and notes. Some of my coworkers have also ordered their own books. A great product and very durable.
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Reviewed in the United States on June 30, 2020
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Ernesto Luna
Los Angeles, US
★★★★★ 5
Great product
Color: Black, Size: 3 Pack
Great for taking notes. Write anywhere
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Reviewed in the United States on January 17, 2026

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