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R33 gearbox

JimX
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JimX Grand Master

JimX

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I changed my gearbox oil recently and there was a fair bit of shredded metal in it. If this is an indication that my box is on its way out, what's the best way to go about fixing it after it blows? I'd rather fix it than buy a 2nd hand one, which may be in the same condition as the one I'm replacing.

Should I pull it apart and just replace the worn/broken bits, or do the whole lot? I can probably do the work myself if I had a workshop manual with proper torque settings for the bolts etc, but if not I think I'd better get a transmission place to do it. Are there any decent transmission places in Sydney that could rebuild it for me for not too much money?

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matlowth Proficient

matlowth

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When you say a fair bit of shredded metal, how much are we talking...

The reason I ask, is because the gearbox plug is magnetised, and as such all the metal shards tend to stick to it.

It's not necessary a sign that your box is on the way out, just general wear and tear!

matt

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JimX Grand Master

JimX

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Hmm, don't really know how to quantify it :rolleyes: A few grams maybe? Enough to fit in your hand but not a handful. I've thrown it all out so I'm relying on my dodgy memory. Touch wood that it's not about to die, I was just trying to figure out what to do should the worst case happen. Synchro's are a little worn on 2nd and 3rd, but I've got some Redline oil in there now which should hopefully improve things.

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JimX Grand Master

JimX

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I don't think it had ever been changed. The service manual specifies 100,000km for "business" use, or *never* for private use! :eek: It's done about 88000km so far, so I guess it may not be an extraordinarily large amount of metal to come out after that time.

Anyway the issue isn't whether or not it's about to die (some boxes with no symptoms of wearing out still blow) but what I should do if it happens. I'd rather know what to do before it blows then try to find out after the event :rolleyes:

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whatsisname Grand Master

whatsisname

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Originally posted by JimX

Redline oil in there now which should hopefully improve things.

G'day Jimx,

Which Redline are you using? Any noticeable improvements since switching to Redline in the box?

The reason I ask is, I too use Redline (in the diff) & am about to try "Shockproof" in my box.

Matt

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JimX Grand Master

JimX

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So far it's stopped crunching going into 5th, but it still crunches slightly going into 2nd and 3rd until the oil warms up. When everything's warm then there's no crunch at all. Apparently after a few weeks it's meant to improve some more, but I've only had it in the car less than a week before I had the accident, so I'll have to wait until I get it back from the workshop before I can see how it goes from there.

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