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Quick question about gearbox oil level

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Old 07 April 2004, 09:57 AM
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Jay m A
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Question Quick question about gearbox oil level

Do you measure hot or cold? I assume cold but I don't want to overfill it if I'm wrong.

Also, can I mix oils? As in manufacturer? I don't know whats in there but I'm assuming its the correct grade - 75/90.....I'm just topping it up.

Thanks
Old 07 April 2004, 11:49 AM
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SuperFlyGuy
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Thumbs up Cold

Originally Posted by Jay m A
Do you measure hot or cold? I assume cold but I don't want to overfill it if I'm wrong.
Always check oil levels when cold, usually after being parked up all night to allow all oil to run back into the sump section
Gearbox is oil recommended as being filled past the max mark by a few mm, this helps protect third gear and alot of SNetters do this (inc me!)

Originally Posted by Jay m A
Also, can I mix oils? As in manufacturer? I don't know whats in there but I'm assuming its the correct grade - 75/90.....I'm just topping it up.

Thanks
For small amounts I dont think this is a problem but always best to have same manufacturer. Castrol syntrax is recommended for gearbox but the grade you mentioned is fine in a decent manufacturer.
Old 07 April 2004, 11:56 AM
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Jay m A
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Thumbs up

many thanks
Old 07 April 2004, 12:14 PM
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SuperFlyGuy
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Wink No probs...

...just check car is very level so oil levels are accurate!
Old 07 April 2004, 03:22 PM
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Redevilwrx
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Question

Dont want to knick the thread , but how do u change the gearbox oil ??
Old 07 April 2004, 11:15 PM
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RON
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Undo the sump plug, allow oil to drain into a lrage bowl, then replace sump plug, and fill g/box with oil, through the dipstick hole, which is under the left hand side of the intercooler!!
Job done.
Old 07 April 2004, 11:44 PM
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greasemonkey
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Probably worth pointing out that RON is referring to the gearbox drain plug which is located underneath the front diff case, not the engine sump plug! Also, probably goes without saying but the gearbox dipstick is located under the right side of the intercooler, which is on the left as you look from the front of the car.

Also don't forget to give the car a good drive to warm the old oil before you drop it, and clean all the scummy stuff and iron filings off the magnet in the drain plug before refitting it. Under ideal circumstances fit a new sealing washer as well.

Probably also worth adding that if you see big bits of metal on the magnet, (i.e. bigger than just filings), clean them off and keep them, as if you later have gearbox problems, the loose bits may help the rebuilder diagnose what's wrong more quickly.
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