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Old 05-08-2020, 09:56 PM
RedArrow RedArrow is offline
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Join Date: Jan 2013
Location: New York
Vehicle: 1986 Volvo 745 TD
Posts: 902
Default Overfilling of the m46 by how much???

Quote:
Originally Posted by ngoma View Post
You sure did a good job cleaning that all up. It may have been underfilled for quite a while.


Wrong ATF for the PS. The PS system wants common Dexron, not Type F, not Power Steering Fluid, etc.

Why not use the extra Type F to overfill the trans. like you were starting to do? Jack up the left side, fill until it comes out of the fill hole. They work better overfilled that way.

Be interesting to see what settles out of your old captured fluid.

Oh shoot, true. The PS does not use the F type. Right!!
IDK what hit me when I topped it up using the F type (though it was only 1/2 inch lower than the `HOT FULL` mark so I didnt add much but still (it was warm, after the test drive) but I don`t understand myself, I even have the proper MercIII bottle right there in front of the battery tray, UGH.
I`ll just empty that ``PS`` reservoir and use the other atf in it.
At least the steering gets a flush too (plus it will have the right fluid).
THX for the note.

About the tranny.

I did not know that it does do good for the m46 to be overfilled.
I thought of it and I did make sure the left side was a little higher but by not much. I was hoping the m46 would take 2.5-2.6 qts instead of the greenbook 2.4... but it still only took 2quarts.

If I decide to overfill it purposely the next time,
What do you think is the suggested amount of overfill as expressed by quarts? Entire m46 takes 2.4 they say but it only took 2quarts.
Would you fill it using 2.5 or 2.75 or 3 full quarts? 3 qts would be a 25% overfill approximately. compared to the factory 2.4 suggestion (of which it only took 2. So if 3 used, there would be a full extra qt in it above the 2 that normally filled the tranny with car being level.

Many owners actually do that? Is it necessary? In this m46 everything has worked fine so far so I maybe simply lucked out that I had no issues with level being that low (good that this car has no abuse except some occasional Italian tune-up; with hot engine).

I don`t think this tranny fluid had been changed since at least ten years ago. Probably much more!
Okay I`ll flush out this atf from the tranny in 50miles and report back about what came out.
By then I should also be able to find that inner o-ring next to the secondary fine filter.

Is it a good idea to remove and clean another part while `inside` the m46?
I guess when something works fine we could leave it alone... but there may be another part to look after too.

Last edited by RedArrow; 05-08-2020 at 10:03 PM.
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