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gearbox oil black

General Tech Talk

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Posts: 19
Joined: Sun Apr 13, 2008 6:28 am
Location: wodonga

gearbox oil black

Post by 03turbo »

Hi Guys
Any idea what would make gearbox oil black?
Changed mine at the recommended 120,000 service and it looked more like engine oil.
Its an 03 Courier
Cheers
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Location: Newy

Post by HotFourOk »

Dirt getting in the oil? Was it watery at all? Do you go offroad? Do you have gearbox breathers? Have you had it since new?
[quote="RockyF70 - Coming out of the closet"]i'd be rushing out and buying an IFS rocky[/quote]
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Location: Melbourne-Australia

Post by MightyMouse »

Has someone added any of the molly based oil treatments ?

Got a second hand transfer that was absolutely black internally, but was in good condition. Previous owner had use an oil treatment.
( usual disclaimers )

It seemed like a much better idea when I started it than it does now.
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Post by coxy321 »

MightyMouse wrote:Has someone added any of the molly based oil treatments ?
Thats not a bad idea actually.

All the gearbox oils i've seen were either white, grey, very dark gold, or normal oily gold color. Never black - except one or two diffs.

Coxy
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Post by 03turbo »

not watery at all, dont go off road much (unfortunately), has a breather, there was a fair amount of air pressure when fill plug released, could be blocked breather perhaps? too much heat?
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Post by coxy321 »

There should be NO pressure at all inside the diff housing. Your breather will be blocked for sure. If you leave it, you'll be destined for a lifetime of replacing axle and pinion seals.

Coxy
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Post by Leighroy1984 »

coxy321 wrote:There should be NO pressure at all inside the diff housing. Your breather will be blocked for sure. If you leave it, you'll be destined for a lifetime of replacing axle and pinion seals.

Coxy
I think he is talking about his gearbox
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Post by coxy321 »

Sorry guys!! Was thinking about my diff all day...

Still, what i said still goes.

Coxy
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Post by 03turbo »

thanks for the advice, will take a look at the gearbox breather
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Location: Melbourne

Post by bazzle »

Just change the oil and monitor it in 10,000k's.
With the breather(s), toss them away and run a hose into engine bay with a cheap small petrol filter on the end.

Bazzle
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Post by 03turbo »

yeah i think i'll do that, thanks for the tip
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Location: melbourne

balck oil

Post by mikeyoda »

I got my rebuilt gearbox back and the oil was black as could be. Had an additive that made the oil go like motor oil. Guy warned me as I left the store that the oil would be black as the ace of spades
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