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Discussion Starter · #1 ·
In preparation for my next track day at Big Willow, I decided to switch out the manual transmission fluid for something slicker: Motul 300 75w90!

I've been impressed with all Motul fluids in the past, so I figured this wasn't much of a gamble. This in conjunction with my new short shifter should help me select the right gear at speed! :)

Only about 1.5 quarts drains out; note that the manual calls for 1.8 quarts (or 1.7 liters).

I found a handy PDF online and have clipped a section here for reference:

Text Font Line Design Number
 

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Let me know how this feels because i am a motul distributor; might make a great How-To!

In addition, I can make it available as a service for anyone not wanting to do it themselves.
 

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Discussion Starter · #6 ·
Let me know how this feels because i am a motul distributor; might make a great How-To!

In addition, I can make it available as a service for anyone not wanting to do it themselves.
I think feedback from the track will be telling. A couple weekends ago I missed third a couple times. It was odd, it's the only time I've done that in the FiST (road or track). I might have been a bit lazy and really started to focus on that 2-3 shift, and it didn't happen again. Like we were discussing in the other thread, the throw was a bit long. Maybe this is a big upgrade! :)
 

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Discussion Starter · #8 ·
For street driving, I can already tell it's a nice change. The engagement is more precise, and the throw is modestly shorter. Most importantly, it didn't create a weird notchy feeling. It glides home into third, and I think the fluid gets some credit here. I did both at once, of course.

I've only driven several miles while bedding my new brake pads.
 

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Is there any aftermarket trans oil that meets Ford's spec for these cars? It's weird that they specify a dual clutch fluid...
 

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Royal Purple says their Synchromax Does data Sheet linky

They (Ford) used the same fluid in the 6 spd manual transmission Mustang in 2011 not sure if they still do or not..
I tried the RedLine Stuff at the time and it didn't do much better shifting wise..
Now the RedLine site not even listing anything for the FiST ( and this is what they say about the Mustang 6 spd Manual)
  • Sorry Red Line does not currently offer a replacement fluid for the MT82 Getrag 6 speed manual transmission
 

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Interesting. I looked to see if Redline had anything comparable to the Synchromax but came up with nothing.
 

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A friend of mine swears by Amsoil for gearboxes.

I don't know if they have anything approved but its another place to look.
 

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AMSOIL is Great if you can find it but this is what their online list says
LUBRICANTS & FLUIDS:
Engine Oil
Grade 1......N/A No AMSOIL Product Recommendation
Manual Transmission,B6 (6-SPD)......SLF [1]
All TEMPS......
No AMSOIL Product Recommendation
[1] Use Motorcraft dual clutch transmission fluid XT-11-QDC
or equivalent meeting Ford spec. WSS-M2C200-D2
Weird they list no motor oil yet either
 

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I'm starting to wonder if the transmission was designed to work with the dual clutch fluid or to work despite it.

According to Wikipedia:

http://en.m.wikipedia.org/wiki/Ford_PowerShift_transmission

The Ford dual clutch transmissions have mostly used wet clutches which means the oil probably has some friction modifier in it like the gear oil you use in a clutch type positraction diff.

Since we have an electronic (open) diff and a dry clutch, the dual clutch oil might just be what they want to put in everything or maybe everything Getrag.

Any way, I think dual clutch oil is a weird choice...
 

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The fiesta DCT is dry clutch, not sure about the focus.
 

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Dry clutches have character...


Sent via poles, wires and telegraph 2.
 

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Discussion Starter · #20 ·
This setup was a very nice change at Big Willow. It basically made gear shifting a non-event. It's shorter throwing, slicker shifting, and worked without any issues. This is a very easy recommendation -- it's cheap and easy! Do it.

Also, when you re-install the shifter cable, make sure it's firmly seated on top. I heard they can pop off. It hasn't happened to me, but I've heard it can happen. If it happens, I heard you can pop it back on again in like two minutes. ;)
 
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