Manual Transmission Fluid?

Just buy 3L and have leftover. Don’t use redline MT-90 tho, that’s a heavy weight gear oil (75w90), that is nowhere near what honda recommends in our trannies (10w30 or 5w30 is recommended I believe, forget which). Not sure how the transmission would react, possibly make it really hard to get into gear. I would go with either penzoil/gm syncromesh or honda mtf, or if you can’t get any of those, a decent synthetic like valvoline max-life (high mileage oil typically has more yellow metal anti-wear additives supposedly).

I’ve used 10w30, honda mtf, and penzoil syncromesh and so far the penzoil seems to be the best for smooth shifts in my moderately worn tranny.

Just FYI: The W is short for winter, not weight. It refers to the viscosity of a multigrade oil at low temperatures. For example, 80W-90 gear oil would have a viscosity equivalent to that of an SAE 80 single-grade oil at low temperature, and SAE 90 at operating temperature. There’s no such designation as 80W, only SAE 80 or 80W-90.

And that’s quite a leap from 30 or 40. WAY too heavy…

EDIT: Just re-read my post after this came back to the top; To clarify, gear oil viscosity is rated differently than motor oil, so 80W-90 would actually be approximately equivalent to 20W-50 motor oil in terms of viscosity. Still thicker than factory spec, but not as much as it sounds.

http://www.amsoil.com/articlespr/2007/article_gearoilbasics.aspx

I just went to the local Chevy dealership and they wanted $24/quart for the synchromesh… was that the wrong stuff? I expected it to go up a little from $9 but not quite that much.

keyword there is “dealership” thats why the price, I used penzoil synchromesh $5/quart and its great I had severe grinding in 2nd and 3rd now just a little grind in 3rd

yeah, other people here said they got it from a dealership for $9 though

I paid $13 at my local gm dealership

[QUOTE=spikius;1863514]Just buy 3L and have leftover. Don’t use redline MT-90 tho, that’s a heavy weight gear oil (75w90), that is nowhere near what honda recommends in our trannies (10w30 or 5w30 is recommended I believe, forget which). Not sure how the transmission would react, possibly make it really hard to get into gear. I would go with either penzoil/gm syncromesh or honda mtf, or if you can’t get any of those, a decent synthetic like valvoline max-life (high mileage oil typically has more yellow metal anti-wear additives supposedly).

I’ve used 10w30, honda mtf, and penzoil syncromesh and so far the penzoil seems to be the best for smooth shifts in my moderately worn tranny.[/QUOTE]

Ok, thanks a lot! I checked also the www.redlineoil.com site, and it sais that MTL is used commonly in Honda and Acura applications. So I bought 3L of it, and going to make a fluid change tomorrow. MT-90 is recommended apparently only to newer Hondas, I heard that at least some stores recommend it for example to Civic Type-R:s nowadays. But mine is old, and will have now MTL to its transmission. :slight_smile:

i’ve only changed by tranny fluid once when i did my clutch job. i used honda MTF, just to be on the safe side. no probs, no complaints.

How often should the transmission fluid be replaced?

Well to bring up the most searched MTF thread again.

I changed my MTF with penzoil Syncromesh @ $6.99 a quart today. I was surprised to see that the transmission had very little actual fluid left maybe a quart at best. My clutch had been replaced about 500 miles previous to this, and the car has about 145K on it. So I doubt the transmission fluid has ever been changed. Now I will keep the 30K mile schedule up to date.

The state of my transmission would be considered extremely poor. Many professional mechanics had told me that the 3rd and 5th synchronizers were shot. They really shifted horribly and even double clutching 5th would never really remove the grinding sound. Also after about 70 miles of 60mph driving in 5th it would pop out and I would have to continue my trip in 4th. So I thought short of rebuilding my transmission I’ll try this syncromesh stuff out.

After changing the fluid I noticed immediately there wasn’t a huge difference. But after driving about 10-20 miles the transmission really started to quiet up and the harshness in shifting into 4th was pretty much gone. And shifting into 3rd was now normal and I didn’t hear any grind below 3500 rpm, but I did hear it in the higher rpms. So far 5th has been quieted down and the grinding is much less severe; although double clutching now produces NO grinding.

I wouldn’t say its a miracle fluid but it is pretty damn good and fresh fluid really helps regardless of the system.

my .02

My integra shifts a little rough and grinds in reverse. Noticed leaking by my tranny area, I’ve never replaced tranny fluid ever, I’ve located the filler bolt by jacking the car and going under, tried to use my 17mm socket wrench but it was too hard to come loose, what did you use? Breaker bar? And when retightening it, should set it to a specific torque? Thnks

NO breaker bar! Go to autozone and find a spray can labeled “penetrating oil”. of some sort.

WD 40 will work too. Let it sit for a while after you sprayed.

Pick up a haynes manual while your at the zone. Thats for the torque spec. I don’t remember what the torque spec was. I can look later in my manual when I get home from work.

EDIT: opps I didn’t see your date of post. You probably tackled it already.

[QUOTE=91akira;2229032]NO breaker bar! Go to autozone and find a spray can labeled “penetrating oil”. of some sort.

WD 40 will work too. Let it sit for a while after you sprayed.

Pick up a haynes manual while your at the zone. Thats for the torque spec. I don’t remember what the torque spec was. I can look later in my manual when I get home from work.

EDIT: opps I didn’t see your date of post. You probably tackled it already.[/QUOTE]

yeah thanks anyways. So I picked up 2 quarts Royal Purple 10w30. Can I use this for my tranny, since the manual says its okay to use 10w30?

don’t do that it’ll just distroy ur tranny. i’ve been tempted to go sythetic for the longest time but time after time all my buddy’s car that’s used syncromesh and sythetics in their tranny’s start to grind. mine’s stayed silky smooth all this time even after having lost nearly all mtf fluid due to axle seal. i really recommend honda/acura mtf. and fyi, honda/acura is the only manufacture out there that acutually make and use their geuine parts! ex. nissan goes to orielly’s whenever they need brakes for their own nissan. wtf is that.

honda mtf ftw.

Honda MTF. All the way! You will not have any problems.

WOW, I am board! I just read this entire post!

I LOLed every time someone said the phrase “my mechanic said”! If you are not working on your car yourself, why are you giving advice in a car forum?

By the way to all the people saying don’t use this or don’t use that. The build-up that “your mechanic” found inside “your cousin’s” engine/transmission is normally caused by lack of maintaince. Your engine/transmission needs to be flushed every so often, but if you have 90K+ and have never done it, don’t. the sluge is what is holding your parts together. However I have heard Quakerstate and Penzoil conventional oil both have wax in it. I don’t know personally because I use Mobil 1 full synthic in my engine and Syncromesh in my Transmission. I have seen Syncromesh fix a lot of wrongs. The only advice I can give you, is to look for a type of oil that says High Detergent. This will ensure no build-up, but start using it before you hit the 60K miles. Full Synthics tend not to have this problem. What ever you do. start doing it as earily in the life of you engine ro transmission as posible!

I hope this helps someone