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Old 08-01-2013, 02:23 PM   #1
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Default 6SP MT Lube Change

I have searched and read everything I could find about changing the lube in the 6SP MT but I cannot find any thread showing the location of the drain, level and fill plugs. There were a couple of links but they were broken. I'm sure I could figure it out but I like to visualize it before I do it. I want to replace the fluid with some Red Line MT90 before I have any issues and get the break in lube out of it. From what I have read it will take 2 qts. Is this correct? I will have to order it online and want to make sure I have enough.

Also, is the drain plug magnetic or should I replace it with a magnetic one? If so, what is the size? Thanks.
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Old 08-01-2013, 03:03 PM   #2
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Yes 2 qt.

Don't know anything else about the 6 speed.


And it's not break in oil. Its a syn oil that under normal driving conditions is good for the life of the trans. Well , so they say
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Old 08-01-2013, 03:57 PM   #3
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Ok everything is on the drivers side.

-Fill plug. This is a large allen or square (for a 3/8 extension) plug on top of the trans. It is located under the boost tubes fairly close to the shifter and vent cap. Get a long funnel because filling it is a biotch.

The drain plugs are both 3/8" drive square plugs.

-Drain plug, located on the rear side of the trans and all the way at the bottom.

-Fill plug, located almost exactly opposite of the drain plug (on the front of the trans), and about 4-6 in higher.

Fill her up with 2 qts or until a little oil comes out the fill plug and enjoy.
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Old 08-01-2013, 04:33 PM   #4
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Thanks a lot for the info, it makes it much clearer. I had read a couple of posts that said the unit was sealed and there were no plugs and it had me confused. I've never seem a manual tranny without them.

It might as well be break in oil since so many people are having shifting problems and some are "fixing" it by putting in proper lube that works right with the synchros. I'm not having any issues right now but if I can prevent it with a simple oil change it will be worth it. Thanks again.
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Old 08-01-2013, 05:05 PM   #5
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Let me know if you go with MT-90, how its workin out
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Old 08-01-2013, 06:06 PM   #6
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Interested to hear as well, mine grinds from 1->2 at high rpms. If all I need to do is swap to MT90 and have it go away, Im all for it.
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Old 08-02-2013, 12:09 AM   #7
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I put Red Line MT-90 in mine and it did not solve the 1 to 2 grind. Also, don't crank the drain plug in hard, the back side of the ring gear carrier is right there and you don't want the drain plug making contact with it.

Take a pic of it with your phone before you remove it and screw it back in the same amount it was before you removed it. Also, the threads on the drain plug have a sealant on them which won't be as good after removing/replacing it so wipe a little RTV onto the threads before screwing it back in.

And it takes two quarts.
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Old 08-02-2013, 12:50 AM   #8
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Quote:
Originally Posted by Crazzyboy View Post
Let me know if you go with MT-90, how its workin out
Quote:
Originally Posted by ScarabEpic22 View Post
Interested to hear as well, mine grinds from 1->2 at high rpms. If all I need to do is swap to MT90 and have it go away, Im all for it.
Here ya guys go, quite a few of us have already done the swap.
Link:Second gear grinding & remedy.
Post #69 is the 1st report of the fluid swap but there are many other posts about members response to swapping the Redline buried in the thread.

It's not so much as fix as much as it is a band-aid.

I put in Lucas 75w-90 because my auto store didn't stock Redline. Turns out the lucas stuff isn't designed for the syncros in our trans so I need to change it out, just something to be aware of.
It did remedy the 2nd gear grind, but going into 2nd on a hard fast upshift is still balky and cold weather 1-2-3, 3-2-1 shifting is tough for the 1st few minutes.
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Old 08-02-2013, 01:50 AM   #9
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Good info in this thread, thanks everyone. Great tip Stew. I'll get a pic of the locations, I took a look tonight and the one on top is easy enough but I have to get the ramps out to get under and see the others. I'm sure their location will be self evident. As long as I can get as many miles as possible before it possibly needs replacing I'll be happy.
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