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Old 03-12-2016, 08:16 PM
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QT I / MP2010 transfer case fluid

It seems that every transfer case in the world is filled the same way: pump in fluid until it starts flowing out of the fill plug hole. Except for some reason the procedure is different for the MP2010 used for Quadra-Trac I. According to the service manual, it should be filled to within 1 to 1.5 inches from the fill opening. It explains you should make a dipstick by bending a metal rod 90 degrees 1.5 inches from the end, and use this to check the level. I did this, and what is strange is that you can't fit the dipstick in the vertical "down" position but you have to rotate it toward the main body of the transfer case (7-8 o'clock position). In any case, I have it filled about an inch below the fill plug. I drained it cold but it only took half a pint to get this level, which is half its capacity. This is a very simple transfer case so I suppose it doesn't need much fluid, but that seemed like too little. I bet if I filled it to the fill plug I would get almost a full pint.

Anyone have any experience with this? Should I trust the service manual?

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Old 03-14-2016, 07:44 AM
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Re: QT I / MP2010 transfer case fluid

IMO, if they were specific enough to describe making a dip stick then you should indeed trust the manual. I have not torn that transfer case apart but some are "sealed" units. Meaning no breather line out the top. The air trapped in the case provides enough expansion room for the oil and it doesn't need a vent. The caveat being that if you overfill it there is no expansion room except out the seals and leaks ensue.
Some older BMW motorcycles have a specific fill for the final drive (180-185cc of oil) and people were blowing them because they filled to the hole. It was an extra 40cc!
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Old 03-15-2016, 10:36 AM
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Re: QT I / MP2010 transfer case fluid

Good points, thanks. I'll trust the manual and keep it below the fill hole.
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Old 03-16-2016, 03:51 PM
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Re: QT I / MP2010 transfer case fluid

I would put in the same amount that came out :-)
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Old 03-16-2016, 04:30 PM
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Re: QT I / MP2010 transfer case fluid

Quote:
I would put in the same amount that came out :-)
I'll do that next time. I was lazy and used my oil change pan to catch the fluid. Next time I'll use something I can measure with. On the other hand, I have a perfectly good dipstick I made with a some wire fish tape...
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Old 03-18-2016, 07:32 AM
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Re: QT I / MP2010 transfer case fluid

Not a bad idea, but I'd still use the dipstick to be sure.
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