transmission fluid mt6
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back n a stang
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1. So is the 75w-90 the correct oil no matter what brand??? 2. Exactly how much goes back in???
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UnleashedBeast
Engine Lubrication Guru
The weight could possibly be in the correct range, but that doesn't mean every 75W-90 lubricant is a great choice. There are a few factors that apply. The three primary factors are cSt kinematic viscosity, base stock used in the formulation, and the additive package.
There is a wide range of viscosity that fall within the 75W-90 viscosity range. *13.50 - 23.99 cSt* That's a huge range. Amsoil MTG is spec'd 14.8 cSt @ 100*C on the lighter end.
Viscosity Charts
Selecting a lubricant on the high end of the scale would result in shifts that were not desirable. The MT-82 is a 2.75 quart fill, so buy 3 quarts.
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Napoleon85
Member
So you guys would recommend the RP 75w90 gear oil over the RP Syncromax MTF? The Syncormax MTF has a cST of 7.7 @100c per the product sheet (I have no idea what this means by the way).
UnleashedBeast
Engine Lubrication Guru
The light viscosity of the Synchromax, if effective, will inhibit more gear roll over noise in the MT-82 Getrag. This may not be desirable for some owners.
I was never impressed with how Synchromax felt in a T-56 Tremec transmission I've owned in the past, and that tranny died with it as the fill.
I was never impressed with how Synchromax felt in a T-56 Tremec transmission I've owned in the past, and that tranny died with it as the fill.
JAJ
Member
Not any more. All of the currently published Ford documentation on the MT-82 (as of September this year) calls for Motorcraft Dual Clutch Transmission Fluid. It's the only fluid listed for the MT-82 in the Owner's Manual and in Ford's Shop Manual. It's the fluid that Ford installs at the factory.
There was a time, fading fast in the haze of history, when Ford put Motorcraft Full Synthetic Manual Transmission Fluid 75w-90 in the MT-82. But those days are past and today, if a Ford dealer services or repairs one of those transmissions, it will be refilled with the Dual Clutch fluid.
So, what that means is that the transmission will probably work with any gear oil that's 75w-90 or thinner down to a viscosity comparable to an ATF. However, there's no evidence anywhere that ATF itself will work.
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Napoleon85
Member
Interesting. I may just go with the Amisol fluid then, if none of the RP fluids are a great match. I'm not really concerned about a little bit of noise, just want to make sure it's operating properly.
I have one of the early build cars (06/10) with the crappy fluid and don't want to take it to Ford due to my mods. It's parked for the winter, but I was getting some crunchy shifting when the temp dropped below 60 degrees so I know it needs done. I don't really care much what it costs or what brand it is, just want to put the best stuff in to give the tranny the best chance of survival.
Also, just to be clear ... this is the Redline fluid in question, correct?
http://www.redlineoil.com/product.aspx?pid=45&pcid=7
That has a much lower cSt@100c (10.6) than the MTG, and they have other products with a much closer rating, such as the MT-85 75W85 (12.0) and the MT-90 75W90 (15.6).
I have one of the early build cars (06/10) with the crappy fluid and don't want to take it to Ford due to my mods. It's parked for the winter, but I was getting some crunchy shifting when the temp dropped below 60 degrees so I know it needs done. I don't really care much what it costs or what brand it is, just want to put the best stuff in to give the tranny the best chance of survival.
Also, just to be clear ... this is the Redline fluid in question, correct?
http://www.redlineoil.com/product.aspx?pid=45&pcid=7
That has a much lower cSt@100c (10.6) than the MTG, and they have other products with a much closer rating, such as the MT-85 75W85 (12.0) and the MT-90 75W90 (15.6).
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UnleashedBeast
Engine Lubrication Guru
Yes, that's Red Line MTL we have been discussing. It will also work well in your MT-82. This is my motto, "as thin as possible, as thick as necessary".
With that being said...that means I want a fluid that allows for great shifting, but is also thick enough to provide a good cushion for metal to metal contact, while minimizing gear noise. That's why I choose Amsoil MTG.
Napoleon85
Member
Thanks for the advice! I just was unsure about how thick was "necessary."
UnleashedBeast
Engine Lubrication Guru
To be honest, it may be hard to say. I've never had a car side by side with MTL and MTG to compare shifting and gear roll over noise. I have compared the new lighter Ford fluid to MTG, and that was no comparison. Despite the less viscous Ford fluid, MTG won in shifting and noise control.
The Ford fluid was too noisy for my taste.
JAJ
Member
The Material Safety Data Sheet for the Ford Dual Clutch Transmission Fluid shows that its viscosity at 40 degrees Celsius is about the same as a Dexron 6 automatic transmission fluid, so that's pretty thin. That would be the "minimum" thickness necessary for proper operation and useful life of the MT-82. Most modern Getrag transmissions use thin - ATF viscosities - gear oils, and it looks like the MT-82 is no exception.
As Ford demonstrated, you can use a thicker fluid (75w-90 is two and a half times thicker at 40 degrees C) and the box will work fine just the same.
UnleashedBeast
Engine Lubrication Guru
From what I have read, the German designed, Chinese built Getrag MT-82 is an older style "noise inherent" design. Ford's idea was to use a more viscous fluid to combat gear rollover noise, but chose a cheap petroleum based lubricant. The transmission became grind city in colder climates.
back n a stang
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Ok, so amsoil what for the record -75w-90???
Napoleon85
Member
BAKnBLK2010
Harley Davidson FLHTCI
I'm pretty sure the early build 2011 cars were filled with Ford's full synthetic gear oil. At least that is what the TSB says concerning the fluid swap.
UnleashedBeast
Engine Lubrication Guru
You do realize that the term "synthetic" in the US is used loosely. It's OK to call refined petroleum a "synthetic" in the US. No where else in the world is this tolerated.
group III base stocks are hydrocracked "highly refined petroleum" and I don't care what the big oil companies try to make you believe, it's inferior to true group IV (PAO) and V (ester) base stocks.
BAKnBLK2010
Harley Davidson FLHTCI
I understand what you are saying. Just out of curiosity do any new car makers use group IV or group V based fluids in their tranny's?
UnleashedBeast
Engine Lubrication Guru
To my knowledge, no. It's not cost effective for OEM.
ok so heres my dilemma, my car has a whine in 1st through 3rd. i only have 950 miles on it
other than that it shifts ok, i wouldn't call it fine, but i wouldn't call it bad. i thought my 03 tacoma with 100k miles shifted shitty, but after driving my mustang it feels like butter lol.
anyways, should i try some different fluid or take it to the dealer first?
i'm worried that it might be a cracked input bearing race or something serious, i don't want to mask the problem then have it rear its head after the warranty is up
other than that it shifts ok, i wouldn't call it fine, but i wouldn't call it bad. i thought my 03 tacoma with 100k miles shifted shitty, but after driving my mustang it feels like butter lol.
anyways, should i try some different fluid or take it to the dealer first?
i'm worried that it might be a cracked input bearing race or something serious, i don't want to mask the problem then have it rear its head after the warranty is up
BAKnBLK2010
Harley Davidson FLHTCI
My car has whined 1st thru 4th for the last 16,000 miles and still shifts like butter.
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