Gearbox and diff oil

warrior · Post by **warrior** » Wed Jul 11, 2012 10:51 am

Ok time to change the diff and gearbox oil....this is what I am going to use from recomendation of FLYIN MIATA

GEARBOX: REDLINE MTL 3 QUARTS

DIFF: REDLINE GEAR OIL 1 QUART

Any comments you have would be great

One question....I am going to cange the oil in the gearbox turret as well but how much does it take in mm? Cant seem to find it anywhere and also does it just go into the hole that the gearlever goes into?

Euen · Post by **Euen** » Wed Jul 11, 2012 11:38 am

Gearbox capacity is 2 litres. Most people tend to use Redline MT90. A good synthetic SAE80W/90 that meets API GL4 or GL5 should be fine.

From memory you only need about 30ml of oil in the shift turret.

The Mazda NA workshop manual specifies the following for the diff
Above -18*C : API GL5, SAE 90
Below -18*C : API GL5, SAE80W
Capacity: 0.65 litre

warrior · Post by **warrior** » Wed Jul 11, 2012 12:32 pm

yeah I have heard that most use MT90 but FLYING MIATA dont recommend it for road use only racing use as they say it only works well when hot.

Angreal · Post by **Angreal** » Wed Jul 11, 2012 5:07 pm

I've been meaning to do the turret oil in my car for a while now. I guess I just remove the gear knob, remove console and then find some hole to suck oil out of and top up?

I also have the big and small boots that I've been meaning to replace at the same time, is this self explanatory once I've pulled everything out?

warrior · Post by **warrior** » Wed Jul 11, 2012 5:14 pm

yeah done the boots and they are easy, just soak the old oil up with a rag then pour in the new oil......about 30ml from what has been said on here

warrior · Post by **warrior** » Wed Jul 11, 2012 5:16 pm

angreal....have you replaced your gearbox or diff oil?

Euen · Post by **Euen** » Wed Jul 11, 2012 5:16 pm

Angreal wrote:I've been meaning to do the turret oil in my car for a while now. I guess I just remove the gear knob, remove console and then find some hole to suck oil out of and top up?

I also have the big and small boots that I've been meaning to replace at the same time, is this self explanatory once I've pulled everything out?

You need to remove the gear lever to top up the turret. If there is oil in there I wouldn't bother with sucking it out, it is not under any stress. You just need to make sure that there is a bit in there.

The big boot needs to come off to get access to the turret. The small boot is held in place by the same bolts that hold the gear lever in place. You may need to cut off the small one and then slide the new one down over the gear lever. A bit of detergent or vegetable oil might help to slide it on.

Angreal · Post by **Angreal** » Wed Jul 11, 2012 8:02 pm

warrior wrote:angreal....have you replaced your gearbox or diff oil?

Yes. Did those a couple of months ago but haven't done the turret yet. I've got all the boots sitting in the garage but just got lazy...

Angreal · Post by **Angreal** » Wed Jul 11, 2012 8:04 pm

Euen wrote:
Angreal wrote:I've been meaning to do the turret oil in my car for a while now. I guess I just remove the gear knob, remove console and then find some hole to suck oil out of and top up?

I also have the big and small boots that I've been meaning to replace at the same time, is this self explanatory once I've pulled everything out?
You need to remove the gear lever to top up the turret. If there is oil in there I wouldn't bother with sucking it out, it is not under any stress. You just need to make sure that there is a bit in there.

The big boot needs to come off to get access to the turret. The small boot is held in place by the same bolts that hold the gear lever in place. You may need to cut off the small one and then slide the new one down over the gear lever. A bit of detergent or vegetable oil might help to slide it on.

Thanks. Might get onto it before summer if all goes to plan and I stop being lazy

Kieran · Post by **Kieran** » Thu Jul 12, 2012 9:52 am

Ive got my redline oil for my gearbox and diff just havent gotting round to it yet thanks for the reminder

warrior · Post by **warrior** » Thu Jul 12, 2012 10:27 am

what type of oil did you get for both?

Kieran · Post by **Kieran** » Thu Jul 12, 2012 10:38 am

Redline 75W90 for the diff and MT90 for the gearbox

Timmo · Post by **Timmo** » Sun Nov 18, 2012 4:06 pm

Any idea of the cost of the rubber boots? Mine has a crack which opens up when the stick is facing rearward which introduces a bit of gearbox and road noise into the cabin (NB 6 Spd)

SLYDIT · Post by **SLYDIT** » Sun Nov 18, 2012 5:28 pm

Just a heads up on oil. The new oil to use which is supposed to be even better than redline, is motorcraft fully synthetic. Not cheap and only available from ford dealers. It is supposed to be the magic oil for manual gearboxesthere has been a huge shift from redline over to motorcraft in the last year or so.
I think mobil 1 has become the diff oil of choice now for non lsd diffs

WideOpenThrottle · Post by **WideOpenThrottle** » Sun Nov 18, 2012 7:09 pm

I havent noticed any difference on the road with Redline oil in the gearbox compared to ordinary oil....yet to see if it makes a difference on the track though!
One day soon i hope!

Angreal · Post by **Angreal** » Sun Nov 18, 2012 10:47 pm

Anyone know where to pick up some os giken diff oil?

Euen · Post by **Euen** » Mon Nov 19, 2012 8:47 am

Angreal wrote:Anyone know where to pick up some os giken diff oil?

Dodsons

Gearbox and diff oil

Gearbox and diff oil

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