Gearbox Oil


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 Post subject: Gearbox Oil
PostPosted: Wed Jan 30, 2013 10:39 pm 
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Driver/Navigator

Joined: Thu Feb 23, 2012 1:57 pm
Posts: 17
Location: Masterton
Got a '96 Defender with the R380 gearbox...just wondering what oil people have tried in it. MTF94 is what is recommended, but buggered if I can find that. On the aussie forums they recommend castrol syntrans, which costs a hell of a lot.

So...anyone got any suggestions?


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 Post subject: Re: Gearbox Oil
PostPosted: Wed Jan 30, 2013 11:59 pm 
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Hard Yaka

Joined: Fri Aug 18, 2006 7:00 pm
Posts: 1517
Location: West Side
this is one of those debates that you will find multiple conflicting opions on .
As the original Rover specification is for Dextron III ATF .
which was specified by rover after multiple complaints about hard shifting using standard 80w/90

I run Redline MTL in my LT77 gearbox with good results.

recently we have a found a nulon 75w/90 semi synthetic that says it is an oem replacement for Dextron III .

but the I have found that if you treat it as a truck gearbox and do controlled shifting ( ie move to nuetral , then move into gear ) you don't get the sticking gears and crunching renowned from these boxes .


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 Post subject: Re: Gearbox Oil
PostPosted: Thu Jan 31, 2013 1:54 am 
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Hard Yaka
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Joined: Sun May 15, 2011 4:04 am
Posts: 767
Location: Nelson
Be wary of 80w90 oils as most of these are gl-5 quality. Use a gl-4 for gearboxs with bronze synchos (sorry, I don't have a clue about R380s) as gl-5 can damage the synchro leading to graunchy changes


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 Post subject: Re: Gearbox Oil
PostPosted: Thu Jan 31, 2013 2:34 pm 
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Newbie
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Joined: Mon Jun 06, 2011 6:41 am
Posts: 1
You can try Penrite Trans Gear 75w-80
See here: http://www.penriteoil.com.au/products.p ... oducts=379
Which you can get from Repco and meets the MTF 94 Spec..

I had it in my 200tdi Defender LT77 Box and it was perhaps a we bit thick when cold but great when warmed up. But it will be better suited to your R380.


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 Post subject: Re: Gearbox Oil
PostPosted: Fri Feb 01, 2013 2:21 am 
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Hard Yaka
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Joined: Wed Feb 12, 2003 7:00 pm
Posts: 791
Location: Moerewa Bay of Islands
slide wrote:
Be wary of 80w90 oils as most of these are gl-5 quality. Use a gl-4 for gearboxs with bronze synchos (sorry, I don't have a clue about R380s) as gl-5 can damage the synchro leading to graunchy changes

If it's a synchro box use GL4 oil, if its not then use GL5, they have an additive that keeps oil on the gear set, deffinitley NOT what you want on a synchro box


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 Post subject: Re: Gearbox Oil
PostPosted: Sat Feb 02, 2013 4:22 am 
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Driver/Navigator

Joined: Thu Feb 23, 2012 1:57 pm
Posts: 17
Location: Masterton
awesome, cheers fellas


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