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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ


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Old 07-01-2014, 09:42 PM   #1
Estey
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AT Fluid Change?

So ive been reading around and theres not too many threads about those of us with AT's. I was wondering if there would be any benefit of switching my fluid from oem to Motul ATF. I saw that there was a MT diy for this but no AT. I read the service manual and this seems pretty doable, just some added steps that are not needed for MT. Also, I intend to change out the diff fluid and im assuming that ill be using Motul gear 300 for this, correct?
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Old 07-07-2014, 03:06 AM   #2
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So ive been reading around and theres not too many threads about those of us with AT's. I was wondering if there would be any benefit of switching my fluid from oem to Motul ATF. I saw that there was a MT diy for this but no AT. I read the service manual and this seems pretty doable, just some added steps that are not needed for MT. Also, I intend to change out the diff fluid and im assuming that ill be using Motul gear 300 for this, correct?
Probably not? A computer controls our shifting. Changing it would only prolong the life of the transmission.
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Old 07-09-2014, 12:33 AM   #3
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There are a few threads here that deal with the A/T. @kavanagh started Automatic Acceleration in Manual vs Auto modes, Stall/Torque Converter, SSP A960E Transmission Upgrades, @DeOppressorLiber, AT Fluid Suggestions, @Tye300, Automatic Transmission @devinclfalcons, Automatic Transmission Fluid Cooler. ?? @ connor_lol,
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Old 07-09-2014, 12:55 AM   #4
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I'd like to know the change interval? I think MT is 60k but what about AT?
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Old 07-09-2014, 04:17 AM   #5
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The transmission uses Toyota WS fluid. You can use aftermarket fluids which is compatible with the WS fluid.

Somebody here posted that they used Motul ATF with their AT. I just can't find the thread. I try to change my AT fluid every 5 track days or so, but I still use the Toyota WS fluid.

I still stand on my opinion that the WS fluid doesn't like to be tracked though, it seems after 3 trackdays the the tranny does not engage as well with fresh fluid. Until I can make sure it is safe to use the motul fluid, I'll just keep using the WS.
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Old 07-09-2014, 12:35 PM   #6
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The manual and my research says change the A/T fluid at 30000 miles.
Also redline D6, Amsoil, Sustina, all state WS compatible. Motul does not but numerous,SSP, shops and individuals all use it with no adverse effects.
A member had a shop put in Redline D4 and it was NOT a good match. The shop put in the D6 once the mistake appeared. His car ran like crap.
On that note has anyone had experience with BG fluids ?


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Old 07-09-2014, 02:37 PM   #7
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For the auto trans, I would stick with OEM fluids.
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Old 07-09-2014, 03:16 PM   #8
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In the respect of voiding the
A/T warranty, then yes stick with the WS. But members who have changed the fluid have reported smoother shifting etc.
That is also why I haven't charged out and had my fluid changed. Waiting on a little more info.



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Old 07-09-2014, 04:22 PM   #9
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hmmm, well I am no longer under warranty. im going to research different fluids, but I intend to change my fluid pretty soon. I haven't done it yet and im nearing 40k. im hoping for smoother shifts and whatnot
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Old 07-10-2014, 09:09 AM   #10
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Quote:
Originally Posted by Estey View Post
hmmm, well I am no longer under warranty. im going to research different fluids, but I intend to change my fluid pretty soon. I haven't done it yet and im nearing 40k. im hoping for smoother shifts and whatnot
Any issues with your transmission yet? 40k seems high, if you enjoy spirited driving typically.
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Old 07-10-2014, 09:34 AM   #11
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hmmm, well I am no longer under warranty. im going to research different fluids, but I intend to change my fluid pretty soon. I haven't done it yet and im nearing 40k. im hoping for smoother shifts and whatnot
Drivetrain warranty is 5 years/60k in the US
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Old 07-10-2014, 10:51 AM   #12
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Quote:
Originally Posted by Estey View Post
So ive been reading around and theres not too many threads about those of us with AT's. I was wondering if there would be any benefit of switching my fluid from oem to Motul ATF. I saw that there was a MT diy for this but no AT. I read the service manual and this seems pretty doable, just some added steps that are not needed for MT. Also, I intend to change out the diff fluid and im assuming that ill be using Motul gear 300 for this, correct?
No one chimed in on the gear lube so YES Motul Gear 300 is what you want for that and I would absolutely do that as soon as you can. I did mine at 6k and the amount of sludge and metal shaving at that point was impressive. Its a good thing to clean that gunk out and replace it. I did feel like the drive train smoothed out a bit as well.

Good luck
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Old 07-10-2014, 10:24 PM   #13
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No one chimed in on the gear lube so YES Motul Gear 300 is what you want for that and I would absolutely do that as soon as you can. I did mine at 6k and the amount of sludge and metal shaving at that point was impressive. Its a good thing to clean that gunk out and replace it. I did feel like the drive train smoothed out a bit as well.

Good luck
Thank you! I will be doing this asap.

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Any issues with your transmission yet? 40k seems high, if you enjoy spirited driving typically.
nope, none whatsoever.. Ive been reading and a lot of people dont even change it out until around 50k. I actually should have done this sooner, but i dont think it will make a huge difference in the long run.

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Drivetrain warranty is 5 years/60k in the US
forsure, I thought so but i just didnt remember. I think im just gonna take a gamble and swap the fluids anyways and see how well it performs. Like somebody said earlier, a lot of people are using Motul ATF with their ssp mods, so im probably going to do the same and see if there is any noticeable difference.
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Old 07-25-2014, 07:43 PM   #14
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@Estey Are you going to attempt to change it out yourself?
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