Changing transaxle oil

RON98 · 10 December 2007

NSX-Appeal said:
I'm changing the tranny oil but I'm a little confused about what kind of oil to use. The service manual calls for 10/30 or 10/40 but doesn't say if regular motor oil is ok or if a special gear oil in that weight is needed.

A search of Prime yields conflicting results: some say "never use motor oil in the transaxle" while others say it works fine. What's the official word? I was planning to use MobilOne 10/30 synthetic - the same oil I use in the engine.

Tips, hints, suggestions?

mobil 1 synthetic is just fine.

our MTF is just 10w30 weight dyno motor oil with friction modifier for the syncros to grip better.

it says in the manual i think. if you run out of tranny fluid and need to top off you can use 10w30 weight motor oil.

you'll find that your tranny might grind a bit more when shifting with the m1 since it does not have friction modifier in the fluid.

i always thought it would be cool to put in M1 with 1 bottle of GM FM.

ralph cerbone · 10 December 2007

isn't that what he is trying to get away from, the reason the tranny grinds is because the synchro cant brake, resulting in a rough eng. no fun

SweetChuck · 10 December 2007

Ya know , I have been pondering what oil to to use , so I went to Honda and they are using something that is 60W to 75W or something like that . It looks like water consistency to me , so I gave it a miss . I can't help but think it would leak passed every seal there is . I'm going to use mobil 1 synth
10/30 W .

NSX-Appeal · 10 December 2007

SweetChuck said:
Ya know , I have been pondering what oil to to use , so I went to Honda and they are using something that is 60W to 75W or something like that . It looks like water consistency to me , so I gave it a miss . I can't help but think it would leak passed every seal there is . I'm going to use mobil 1 synth
10/30 W .

I finally put the Honda MTF in mine last night. Snow all melted away so I was able to drive it a short distance, and I noticed right away that the "notchiness" I used to have going into 3rd was gone. Seems to shift much smoother now. According to the service records I got with the car, the tran oil was last changed in December '05, but it didn't indicate what kind of oil they used. Whatever it was looked fairly clean coming out.

Anyway, use the Honda MTF and you'll be happy. :smile:

4AU4LIFE · 10 December 2007

I might just switch mine back to Honda MTF then.
BTW, how many quarts do I need? I'm to lazy to look.

titaniumdave · 11 December 2007

3 quarts

David NSX · 21 April 2008

titaniumdave said:
Tranny filter cover pic.

Here is the picture of the MTF filter removed.

angkorwat · 24 April 2008

David NSX said:
Here is the picture of the MTF filter removed.

Do you change the MTF filter or just clean and what kind of chemical to clean it?

David NSX · 24 April 2008

I just cleaned it with dishwasher soap and air dried it over night. The filter is made of plastic and very fine wire mesh. My filter was very clean as I only have 14,000 mile on my 2001 NSX. I used the new Honda MTF.

angkorwat said:
Do you change the MTF filter or just clean and what kind of chemical to clean it?

NSXkkk · 24 April 2008

a newb question

how often do i change transmission oil?

every 15000 miles?

NSX GT · 26 April 2008

David NSX said:
Here is the picture of the MTF filter removed.

I did not notice the filter. was it near the drain plug? Twist off?

David NSX · 26 April 2008

Please see attached picture for location of the filter (the picture shows the filter location without the filter) It was titaniumdave that pointed out that there was a MTF filter on this thread (post 21, and 25). Before that I did not know there was a filter. I don't think it is show on the online 91 service manual. Thanks Dave.

NSX GT said:
I did not notice the filter. was it near the drain plug? Twist off?

NSX-Appeal · 30 April 2008

David NSX said:
Please see attached picture for location of the filter (the picture shows the filter location without the filter) It was titaniumdave that pointed out that there was a MTF filter on this thread (post 21, and 25). Before that I did not know there was a filter.

Crap, I didn't know there was one either. My service records showed about 20K since last tranny oil change. Now I wonder how gunked up the filter might be.

I suppose I could drain out the new oil I just put in, clean the filter and reuse the oil.

Larry Bastanza · 30 April 2008

NSX-Appeal said:
Crap, I didn't know there was one either. My service records showed about 20K since last tranny oil change. Now I wonder how gunked up the filter might be.

I suppose I could drain out the new oil I just put in, clean the filter and reuse the oil.

I completely agree it is a good idea to check/clean the filter, however I would not do the job over for that. Just do it next time

.

Regards,
LarryB

Kelly's NSX · 30 April 2008

just remove the filter and clean with dish soap???
are there any special gaskets that need to be replaced?
torque specs?

OLDMNSX · 30 April 2008

Kelly's NSX said:
just remove the filter and clean with dish soap???
?

I am not sure that dish soap would be my choice. How about spray it off with a little brake parts cleaner? First take a magnet and run it over the fliter and see if you get any ferris particles. There probably isn't anything on it anyway.

Kelly's NSX said:
are there any special gaskets that need to be replaced?

The O-ring should be just fine to reuse. Coat the O-ring with a little tranny oil before you put it back in.

Kelly's NSX said:
torque specs?

I am sure that the manual gives you a number, but just snug will do the job.

BTW, how did the clutch master change come out? I think that on sunday when I called, you must have been on your back under the dash. Sorry about that.

Brad

Changing transaxle oil

RON98

ralph cerbone

SweetChuck

NSX-Appeal

4AU4LIFE

titaniumdave

David NSX

Attachments

angkorwat

David NSX

NSXkkk

NSX GT

David NSX

Attachments

NSX-Appeal

Larry Bastanza

Kelly's NSX

OLDMNSX

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