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Pouring gear oil into the shifter turret

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Old 01-11-18, 06:58 PM
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Pouring gear oil into the shifter turret

Is this a common practice? I ask because it was mentioned in the write-up I read for rebuilding the shifter (which I recently did). I'm going to put new fluid in my transmission and diff soon anyway, but the issue is that I barely have enough fluid as it is, assuming I'll need to fill both to their specified capacity. Does draining the transmission normally also drain any fluid that was added via the shifter turret? I assume not since that's not where you're supposed to add fluid. I have no idea how old it is or how much is in there, but it's obvious to me that someone once poured fluid into the turret since it was on my old shifter bushings, and I can see some by looking down into the opening. I could always buy more gear oil, but it would have to be from a different brand since the stuff I have is Neo 75w90.
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Old 01-11-18, 11:47 PM
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the oil in the shifter thing and the oil in the transmission dont see each other. siphon out the old shifter oil and pour new of that neo in there. not too much though. keep in mind it will get hot and expand.
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Old 01-12-18, 05:37 AM
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Yes 75w-90 gear oil is required. Page J-62 of the FSM. It also directs you to grease the shifter ball socket. Just be careful that you don’t overfill.
This is also covered in the FSM but can generate questions for first-timers... TWO drain plug (C and B), ONE fill (A). Probably not necessary but I use a little Teflon tape. And be careful not to go crazy tightening the plugs, especially two pipe threaded ones. Leave the socket-head plug alone.

Last edited by Sgtblue; 01-12-18 at 05:45 AM.
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Old 01-12-18, 07:52 AM
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BTW the fill plug and the drain plug that doesn't have the crush washer needs some Teflon tape on the threads. If you look Mazda used that from the factory. Scrub off the old tape so the threads are nice and clean, wrap with new tape, good to go. If you don't you can get a seeping leak at those plugs.

Not sure if the shop manual says how much gear oil to put in the shifter hole, it shouldn't be much.

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Old 01-12-18, 09:51 AM
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Originally Posted by Sgtblue View Post
And be careful not to go crazy tightening the plugs, especially two pipe threaded ones. Leave the socket-head plug alone.
Believe me, I plan on it. Whoever did it before me used loctite or something, so I ended up rounding off the fill plug and had to get the torch out.

Originally Posted by DaleClark View Post
Not sure if the shop manual says how much gear oil to put in the shifter hole, it shouldn't be much.
It's somewhere around 80cc. I don't understand why they didn't use milliliters. It says to add fluid that way after a clutch job or disassembly of the transmission, so I was hoping I could skip it. If I have any of the Neo left over I'll pour it in there, but if not I can always go buy something else. Thanks for the info guys.
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Old 01-12-18, 10:21 AM
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Originally Posted by Mr357 View Post
It's somewhere around 80cc. I don't understand why they didn't use milliliters.
1 cubic centimeter = 1 milliliter
1cc = 1mL

I suspect that they used cc instead of mL because you would use a syringe to measure and squirt the oil in the shifter well. Syringe volumes in the medical profession were traditionally referred to as cc's. Probably more than you wanted to know.
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Old 01-12-18, 06:51 PM
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Awesome, another excue to go under the car... good info.
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Old 01-12-18, 09:19 PM
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For the sake of anyone who might reference this thread, I checked the FSM again and it says to use 80 - 95 cc of fluid which of course is 80 - 95 mL or 2.7 - 3.2 oz.

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Old 01-13-18, 08:52 AM
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FYI the amount above is with the back end of the trans DRY. It won't drain out doing a regular gear oil change, only if you opened the back half of the transmission up.

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Old 05-10-18, 12:48 PM
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Originally Posted by DaleClark View Post
FYI the amount above is with the back end of the trans DRY. It won't drain out doing a regular gear oil change, only if you opened the back half of the transmission up.

Dale
How does one drain out from the control case to replace with fresh oil? Can I siphon from the top with the shifter out I assume? Anyone happen to have an image of said siphon location? Happen to know hose O.D. that would fit?
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Old 05-10-18, 01:43 PM
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There should be enough room to get in there to siphon out the gear oil. A smallish tube should get in there fine.

Might even use a gear oil pump to get it out of there. If you don't get all of it I wouldn't sweat it too hard, the oil in the turret doesn't do much and isn't under a lot of load.

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Old 05-10-18, 02:07 PM
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Originally Posted by DaleClark View Post
There should be enough room to get in there to siphon out the gear oil. A smallish tube should get in there fine.

Might even use a gear oil pump to get it out of there. If you don't get all of it I wouldn't sweat it too hard, the oil in the turret doesn't do much and isn't under a lot of load.

Dale
Thanks Dale
I do intend on using a gear oil pump for my diff and transmission fluids as well so ill see if that works in the control case.
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Old 05-10-18, 05:20 PM
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good info..
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Old 05-15-18, 07:58 AM
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Just to follow up for the sake of future readers:

I was able to suck out the old oil in the control case from the top with the shifter assembly out as Dale mentioned. I used a syringe similar to link below to both extract and then replace with new oil. Note that you suck out the oil from the front and the back of the area that houses the shifter bushing.

www.amazon.com/gp/product/B00J26U3R8/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

Last edited by Boriboost; 05-15-18 at 08:03 AM. Reason: My spelling sucks
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Old 05-16-18, 01:51 AM
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Would pouring oil into the shifter turrett help notchy gears?
I was wondering cause I currently have a notchy 2nd gear which according to other relevant threads could be due to i) wrong gear oil (currently using RedLine) or ii) synchro gone bad.
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Old 05-16-18, 03:53 AM
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If it's just on one gear, then the notchiness is probably internal. Changing the shifter reservoir oil won't help. And IMO what type or brand of oil goes in there isn't critical. Just don't forget to grease the pivot ball and lower bushing.
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