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#4586778 - 11/27/17 04:05 PM MTF OCI
Kev994 Offline


Registered: 08/18/16
Posts: 19
Loc: North Carolina
Whatís the general thought for a change interval on a manual transmission ? My 2010 Lanceís warranty book says 2 years/ 30,000 mile (48,000 km). Iím convinced this is for the automatic, which shares the same warranty book. The last time I changed it the fluid looked brand new, I replaced it with Redline MTL. Iím coming up on the change interval and am wondering if changing it again is a waste of time. Thanks.

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#4586829 - 11/27/17 05:26 PM Re: MTF OCI [Re: Kev994]
widman Offline


Registered: 05/27/02
Posts: 3282
Loc: Bolivia
On synthetic GL-4+ fluids, I recommend 50,000 km. Beyond that you really don't know how much dirt, wear materials, or whatever is circulating. Since it is only 2 or 3 its, no big deal.

For anyone still using the old formulas, I would change out as soon as possible.
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#4586834 - 11/27/17 05:32 PM Re: MTF OCI [Re: Kev994]
Mr Nice Offline


Registered: 09/12/04
Posts: 21187
Loc: Orlando, FL
You'll notice smoother shift with new MTF.

On my Honda and Acura I change MTF max 40K miles.

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#4586846 - 11/27/17 05:54 PM Re: MTF OCI [Re: Kev994]
Kev994 Offline


Registered: 08/18/16
Posts: 19
Loc: North Carolina
Thanks for the input. I did notice it shifted better the last time I changed it, I had just assumed that was the switch from Diaqueen to Redline. It only takes 3 qts, so I guess for $50 I may as well. The spec is for GL3 but the Redline I put in is GL4.

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#4586850 - 11/27/17 05:58 PM Re: MTF OCI [Re: Kev994]
JHZR2 Offline



Registered: 12/14/02
Posts: 41775
Loc: New Jersey
I generally changed when shift feel degraded.

In my E30 with redline, it was repeatable. When I went to Amsoil the feeling didn't change. I'd wait until you feel a change, then fill with Amsoil MTF.

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#4586864 - 11/27/17 06:10 PM Re: MTF OCI [Re: Kev994]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 6150
Loc: USA
Most manual transmissions never require a fluid change. Manual transmissions don't get as hot as automatic transmissions.

The only mfr I know of that specifies a MTF change is Honda, but their MTF is basically motor oil, and in fact, they used to specify just motor oil until they made their own MTF in 1996, and even then they say motor oil can be used as an alternative.

A few cars say to replace the fluid around 8000 miles, then never again.

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#4586891 - 11/27/17 06:39 PM Re: MTF OCI [Re: Kev994]
Audios Offline


Registered: 11/19/11
Posts: 884
Loc: Lyndhurst NJ
Id recommend every 40k or so, but usually we sell it with spark plugs, air filter fuel filter etc.
_________________________
2002 VW Golf TDI-Mobil 1 5/40 TDT
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1998 BMW M3/4/5 Fuchs 5/40
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL

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#4586995 - 11/27/17 08:11 PM Re: MTF OCI [Re: Kev994]
ruhroh Offline


Registered: 12/11/16
Posts: 110
Loc: NC
I've no idea but the last time I changed the fluid, merc/dex3, it was about as dark as an auto transmission's fluid after around similar mileage (40K). It also washed out some small specks of metal, which I'm guessing is from the synchros. Then again, mine uses ATF and not gear oil and I just use the cheapest merc/d3 I could find. My owner's manual doesn't specify manual transmission fluid change; it only tells the owner to check that it's at proper level by pulling the fill plug. I'd still change it on a periodic basis though.

I couldn't tell any improvements in shift quality after a fluid change, to be honest.

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#4587003 - 11/27/17 08:17 PM Re: MTF OCI [Re: Kev994]
BrocLuno Online   content


Registered: 09/06/15
Posts: 5514
Loc: Kalifornia Kollective
50K has always been my # if filled with MTL. That is one fine lube. It cures all sorts of bad shifting issues smile
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#4587031 - 11/27/17 08:49 PM Re: MTF OCI [Re: ruhroh]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: ruhroh
It also washed out some small specks of metal,

I couldn't tell any improvements in shift quality after a fluid change, to be honest.


I change it every 10,000-20,000 just to get the flecks out (I do a lot of towing)

I DON'T TOSS IT, THOUGH.....

It goes back in the bottles so the grit settles to the bottom...
and then goes right back in again on the next change.
You'd be surprised what settles out!
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#4587076 - 11/27/17 09:56 PM Re: MTF OCI [Re: Kev994]
E150GT Offline


Registered: 03/11/12
Posts: 1096
Loc: San Antonio, TX
i changed the fluid in my truck for the first time at 240k. What was originally red ATF came out black. Didnt really make a difference in shifting. Ive never changed any of the fluid in my FWD mazdas, although I probably will at 50k which is coming up real soon.
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1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 250k 5w30
2016 Mazda6 Touring 6MT - 56k 10w30

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#4587108 - 11/27/17 10:42 PM Re: MTF OCI [Re: Kev994]
CELICA_XX Offline


Registered: 11/28/08
Posts: 861
Loc: Oklahoma
I changed the fluid for the first time at 150k in my little ECHO commuter car with Amsoil MTG. No difference in shifting whatsoever.

Changed again at 200k (with more Amsoil) and the fluid still looked very good.

I don't think I'll change it again for a long time.
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15 Toyota Prius - M1 EP 0w20
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#4587141 - 11/28/17 12:25 AM Re: MTF OCI [Re: slacktide_bitog]
zeng Offline


Registered: 09/01/15
Posts: 2188
Loc: Malaysia
Originally Posted By: slacktide_bitog
Most manual transmissions never require a fluid change. Manual transmissions don't get as hot as automatic transmissions.

Why would it be so , as they have fewer components IINM ?
..... or sump volume matters ?


Edited by zeng (11/28/17 12:25 AM)

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#4587161 - 11/28/17 02:15 AM Re: MTF OCI [Re: Kev994]
Kamele0N Offline


Registered: 02/09/15
Posts: 2038
Loc: Slovenia
Generally all gearboxes (AT/MT) nowadays are "sealed for life"...

But since I personally dont belive in that nonsense...I am changing MT fluid @aprox 90kkms (AT fluids @aprox 60 kkms)
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2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD various 10w40

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#4587869 - 11/28/17 05:58 PM Re: MTF OCI [Re: JHZR2]
Kev994 Offline


Registered: 08/18/16
Posts: 19
Loc: North Carolina
Originally Posted By: JHZR2
I generally changed when shift feel degraded.

In my E30 with redline, it was repeatable. When I went to Amsoil the feeling didn't change. I'd wait until you feel a change, then fill with Amsoil MTF.

I struggle with the Amsoil MTF. Neither my Lancer nor my Outlander have recommended MTF or Gear Oil when using their vehicle recommendation tool. The Lancer calls for 75W80 GL-3. So the MTG should fit this, I canít figure out why it says ďno recommended Amsoil productĒ. The Outlander calls for 85 W and 90W GL5 so the severe gear 75w90 should work but I get the same message.

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