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Old 04-20-2018, 06:15 PM   #26
moarboost16
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I did see that, and that's mostly my concern.
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Old 04-21-2018, 11:39 AM   #27
g-heap
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I had used M1 75w90 and got the grinding, so I looked for gear oil without the LSD additives and there weren't many readily available.

I replaced the gear oil with Walmart's supertech(?) 75w90 at the recommendation of someone here, and the grinding went away. It's labelled as a synthetic blend, suitable for "top-up" of LSD. I am guessing it doesn't have LSD additive, so it's adequate for top-off, but not for replacement.

Motul produced synthetic gear oils without LSD additives, and some people seem to be big fans, but they are bit costly.

Never tried to Subaru-branded gear oil, and they seem to have changed formulation a few times.

The grinding problem is/was true for older models 5/6-speed manual gearboxes (mine is ancient '00 model). Don't know if it's still an issue with the recent model's gearbox.
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Old 04-23-2018, 12:11 PM   #28
moarboost16
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Ok, I have already read this but not specific to the 6speed in a 15+ wrx. I am probably just going to give it a try and see how it goes. If it starts acting funny or I don't like it then Ill just change it out for something else without the LS additive.
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Old 09-12-2018, 10:08 PM   #29
6spdwrx
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Default Re-using crush washer

I don't see anywhere about mentioning transmission drain plug crush washer. Can we re-use it if undamaged? Is OEM one made of aluminum?
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Old 09-18-2018, 11:16 AM   #30
d2theyip
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Quote:
Originally Posted by 6spdwrx View Post
I don't see anywhere about mentioning transmission drain plug crush washer. Can we re-use it if undamaged? Is OEM one made of aluminum?
I'm pretty sure it's a rubber gasket and ~$3 from a dealer. I'm wondering if you can reuse this as well, although I need to go to the dealer anyways so I might as well pick one up.
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Old 09-18-2018, 11:29 AM   #31
standardtranny
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Quote:
Originally Posted by 6spdwrx View Post
I don't see anywhere about mentioning transmission drain plug crush washer. Can we re-use it if undamaged? Is OEM one made of aluminum?
Mine is made of steel but I hear they come in aluminum or brass as well depending on the vehicle. I reused mine and torqued it to spec with no issues. It's just a flat washer and not a crush washer.
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Old 09-18-2018, 11:33 AM   #32
d2theyip
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Quote:
Originally Posted by standardtranny View Post
Mine is made of steel but I hear they come in aluminum or brass as well depending on the vehicle. I reused mine and torqued it to spec with no issues. It's just a flat washer and not a crush washer.
@standardtranny, what torque spec did you use for the tranny and rear diff?
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Old 09-18-2018, 12:16 PM   #33
Canez17
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Default I support DIY enthusiasts 💯

Service and maintenance is crucial. DIY is always a great method, following instructions and specs will determine how well the job will turn out. I always ask as many questions as I can on a DIY job.
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Old 09-18-2018, 01:13 PM   #34
standardtranny
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Quote:
Originally Posted by d2theyip View Post
@standardtranny, what torque spec did you use for the tranny and rear diff?
https://forums.nasioc.com/forums/sho....php?t=2874775

The front torque spec can be found on the 2015 wrx epic thread of knowledge on here
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