Searched high and low for the past hour, but can't find a tutorial on changing the manual transmission fluid on a 3rd gen. Think I've got it pieced together from bits of several threads, but haven't seen the thorough type of write up that I seem to be able to find on here for everything else. The one link that people have used (4runners.org) is dead. Looking to change manual transmission fluid on 2000 V6 5spd. Any help/pictures appreciated. Going to buy a pump and use Redline MT90.

Pretty easy, loosen the fill plug, then remove the drain plug, let it all flow out. Good idea to put some new crush washers on the plugs, then refill. I didn't even need a pump, I was able to use the little quart containers and squirt it in.

Pretty straight forward maintenance.
24mm nut for both drain and fill plug. 2.3 qt capacity of GL4 or GL5 gear oil. And torque the plugs to 27 ft lb when done.

Always remove fill plug first. Don't get stuck with a trans you can't fill.

Redline MT-90 is a great synthetic GL-4 if you want to go high end.

GL-4 is preferred over GL-5. Sulfur in Gl-5 eats up brass synchros.

MT-90 is good stuff, I second that recommendation.

Thanks all for the info. Guess I was overthinking it. You get used to seeing a detailed how-to with pictures for everything on here!

Not many GL5's do this anymore... but there is no reason to go GL5 when a GL4 is what is recommended fluid and there are so many good GL4 fluid options.

(GL5 fluid is required on transmissions with integrated hypoid gears like those found on the Celica Alltrac/GT4 and manual transmission Subarus...)

-Charlie

Should you get these crush washers from the dealership?

Do not put GL5 in our M/T.

Red Line MT90 is the shizznit.

Yes.

And +1 on the mt-90

I was going to start a topic about this. I'm not saying this is not true. But exactly how do we know this? Are there any scientific or physical tests that people have done to prove this statement. Because, I had regular valvoline gl-5 gear oil in my tranny for year plus. Then switched to redline. And my tranny went to shit in like 6 months. I'm not sure if it's related to gear oil or not. But I really want to know exactly why gl-5 is bad for our manual transmission. And the proof. Vs someone said ... heard it on the internet. Currently I replaced my transmission with a used one again. And I'm running Walmart gear oil. I'm debating to switch to redline.

Maybe something like how auto trannies can die after you flush out all the gunk.

One of the first things I did when I bought my '98 was change the diffs/trans fluid. I put Redline MT-90 in, and I did find shifting was a bit easier/less clunky but this is hardly scientific. I had only driven the thing for a few weeks before I changed it out. I would definitely be interested in seeing some sort of comparison, but that hard to come by.

To the OP, 4runner.org has gone up and down like a yo-yo over the past few years. I assume it's cause people like me read the site and don't donate to the hosting costs... But after the first time I noticed it went down I ripped the entire site. I attached a PDF print out of the write up your looking for.

Attached Images

DiffsAndTranny.pdf (818.0 KB, 1500 views)

I stand corrected. Thanks Scramble.

First, MT-90 hasn't destroyed the four different Toyota Aisin manual transmissions I've used it in over 19 years.
Second, I've never seen the synchros in the R150F, so I wouldn't know if they are made of brass, or are affected in any way by the extreme pressure ingredients in GL-5.
Third, Toyota says both GL-4 and GL-5 are OK in the trans. Same for my old '91 4WD Toyota truck also. One service guy(a "drivetrain expert") put Mobil 30 weight motor oil in the trans in that truck. It worked fine, but I changed it 'cause the book says use gear oil.
Fourth, One nice thing about MT-90: It lasts a really long time. Like 60K miles just fine. I learned that when I drained it out of that old '91 truck at about 30K miles: It looked new.