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Old 28-08-2007   #1
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Gear box oil

I'm planning on changing the gear box oil on my previously very neglected B. I read in the hand book one sort of oil, but then in the service cd it recommends ep80. I've bought some castrol ep 80 but have some valvoline 75w90 semi synthetic gear oil-would that be best? Which should i use for the best gear change/longevity of the gear box-any ideas more than welcome-the gl4 spec is met by the valvoline stuff by the way!
Jezzer
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Old 29-08-2007   #2
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Re: Gear box oil

Mine is filled with automatic transmission fluid
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Old 29-08-2007   #3
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Re: Gear box oil

I plan to do the same, once I gets some time!
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Old 29-08-2007   #4
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Re: Gear box oil

Quote Originally Posted by superspotter View Post
Mine is filled with automatic transmission fluid
Can you recommend a brand/SAE standard? Also, is there a property in the auto fluid that could cause issues in a manual box (for instance viscosity of the auto oil until it gets warm etc)........?

Like the idea of improving my sometimes stiff gearchange but don't want to do it at the cost of my gearbox seals or worse still my gearbox!!
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Old 29-08-2007   #5
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Re: Gear box oil

Im not sure of the specific oil I have used, I need to check it out. I can say though that I have used it in several different cars with no seal problems etc
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Old 29-08-2007   #6
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Re: Gear box oil

I used the redline MTL oil puchased from demon tweeks. Two US Quarts at £11.95 each. Gear change is much better than before.
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Old 30-08-2007   #7
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Re: Gear box oil

Quote Originally Posted by KC3 View Post
I used the redline MTL oil puchased from demon tweeks. Two US Quarts at £11.95 each. Gear change is much better than before.
KC - where did you get it from?
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Old 30-08-2007   #8
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Re: Gear box oil

I bought the oil and a few other bits from these guys, there really helpfull.

www,demontweeks.co.uk or 01978 664555

Hope this helps.
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Old 05-02-2009   #9
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Re: Gear box oil

What is the oil capacity of the gearbox?
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Old 05-02-2009   #10
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Re: Gear box oil

How often should gearbox oil be changed? And how do I know if a change is due?
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Old 06-02-2009   #11
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Re: Gear box oil

I'm pretty sure its every 70,000 miles according to the service book. There aren't really any indications of it needing to be changed, but all the swarf collects in the bottom of the box from normal wear and tear and also from gears being grinded and this needs to be drained out.
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Old 06-02-2009   #12
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Re: Gear box oil

It says 2,5-3 litres on this link:
http://www.fiatbarchetta.com/btech/gboil.html
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Old 06-02-2009   #13
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I was only doing 80...
 
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Re: Gear box oil

ep80 is a single grade oil, I would go for the synthetic 75w90 - something like Castrol Syntrax or the Valvoline mentioned above.

Auto transmission fluid is designed to do a different job, I wouldn't use it in a manual.
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Old 06-02-2009   #14
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Re: Gear box oil

I'm going to buy some Redline MTL for the B but need to know how much to buy.
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Old 06-02-2009   #15
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Re: Gear box oil

Quote Originally Posted by Robot View Post
It says 2,5-3 litres on this link:
http://www.fiatbarchetta.com/btech/gboil.html
Um...
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