What transmission fluid are you using?
 

Just wondering what MT transmission fluid most people here are using. Let me know if you want me to add any other options.

We've had phenomenal service from Motul Gear 300 over the years and have switched over to that as our standard Trans and Diffy fluid for both the BRZ and the Subaru Platforms.

-Mike Paisan

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Many here switched to Motul including myself. Once it's warmed up it's definitely smoother, but sometimes when it's cold it's almost impossible to downshift from 3rd to 2nd.

I shouldn't have to double clutch to downshift when cold...is pentosin the only thing that helps COLD?

Redline MT-85 is supposed to be similar to Pentosin with regards to shift quality when cold. Still waiting to see if anyone has tried it.

We use this in NY/NJ where it's cold all winter. No such issues on any of our cars here and we've installed Motul Gear 300 in a lot of transmissions over the years.

-Mike Paisan

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Double clutching doesn't help. Even when I'm at a stop sometimes it won't go into 2nd, even tho 1st goes in.

I would have it looked at while it's still under warranty. Or change the fluid to stock and see if that makes a difference.

-Mike Paisan

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Do you happen to know what is the factory fluid?

I'm pretty sure it's the Motul fluid. It never had this problem when I was on stock fluid. I ordered a lab kit and I'm planning on changing soon.

There's always the chance I over or under filled but I've done trans fluid quite a few times.

Torco mtf here

I can't get into 2nd from 3rd unless I double clutch...so either you live somewhere colder or your box is screwier.

@AZP Installs I take it you were talking about Motul Gear 300?

Actually tonight I tried to replicate the problem and it does go in when I double clutch. It's not cold here, I live in SoCal. Actually tonight was freezing. 55F :lol:

....

You would need to get it from a dealer, I'm not sure what it is, even if you could get it outside of a dealer, it could be a different blend for "public" consumption.

-Mike Paisan

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Yup I was referring to the Motul Gear 300 in that it shouldn't cause a problem, we've installed it in several FRS/BRZ boxes and it has been cold (in the 20s) here in NY/NJ this winter with no complaints.

-Mike Paisan

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I am going to try it next week end. I put MT-90 in several months ago and it is great in that it resolved the issue, I would say about 80%, but I'm taking the bottom panels off to put some Perrin pipes on anyway, so I thought I would see if the MT-85 (which is still withing the Subaru recommendation) would be even better.

Well, too late to get it done today; I already left Andrewtech. :bellyroll:

and how is that working for you on colder mornings?(curious!)

Motul Gear 300 in both trans and rear diff., no complaints so far.

Motul Gear 300
 

Changed to Motul Gear 300 in trans and diff in Oct. Shift to 2nd was never very smooth. Switching to Motul Gear 300 from OEM fluid didn't change that. It was neither better nor worse.

Then came the winter (Northern New Jersey) and first few minutes of driving in cold weather shifting to 2nd gear is very hard at best. Sometimes I need to double clutch, and at times that even doesn't work so I skip 2nd gear.

From what I have read in this forum this is fairly common.

I used Motorcraft MTF from Ford. It's basically a rebranded product from the Germans and sold under the Ford name. I currently have it in my Mazdaspeed 6, and I will probably try it in the FR-S when it gets here (waiting for it to ship in). The Miata guys swear by it, I know some S2000 guys that run it ( even though it's virtually sacrilege to veer away from Honda MTF), and a couple 240 guys that run it in their drift missiles. It's not cheap, a fluid change for my MS6 ran me ~$70 for 3 qts (2.6qts used) for a change, but it cured my 1st-to-2nd glitch that most MS6's tend to have.

Idk what the fluid specs are for this platform yet, but it might be something to consider.

Edit: After some searching, it seems the greatest advantage for Ford's elixir over Redline fuid is in fact the COLD temp operation improvement.
http://forum.miata.net/vb/showthread.php?t=457325

I'm using stock factory fluid that came with the BRZ, im at 5000 miles and note the following:

-- Shifting 1-2 or 1-R at low speed can make a clicking noise that is audible outside the car

-- The shifter bushings no longer feel as good as they did when brand new. Shifter can be quite notchy, and produces some dull metal clicking sound sometimes as I shift around.

--I hopped in an FR-S at 3000 miles, factory fluid, and its shifter had no notchiness, felt better than mine. Does FR-S have a different factory fill?

Anyone brave enough to try Scotty's Cocktail?

http://forums.nasioc.com/forums/showthread.php?t=920674

Just the new ones I drive at work have this 1st-2nd notchiness which I find a little disconcerting. I'm wondering what fluid to change mine out with when it gets here.

We've never seen good results from it. Over the years anyone who has mixed up a cocktail in our opinion has seen earlier than anticipated transmission failures. I would stick with not mixing fluids no matter which one you end up choosing.

-Mike Paisan

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Pentosin is working for me. Redline was just as bad as stock when cold, ridiculously hard to shift the lower gears when cold in traffic, 0*c to -15*c.
It even gave me the odd "catchy" feeling shifting to 2nd and 3rd when completely warm. The Pentosin is good, not magic, but good. I actually had gears grind with the Redline MT-90 with the clutch all the way to the floor, slow precise shift, never even close to anything like that with the Pentosin.

Curious if anyone is running Eneos 75w90 Gear Oil in there transmission AND/OR differential? Seems there is some discussion out there about GL-4 and GL-5...NOT to use the GL-5 with brass synchros? Is there any truth to that? A buddy of mine is running Eneos Sustina 0w20 and Eneos 75w90 all around, says its amazing.

Thoughts?