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Re: [Healeys] Dave Dougan's overdrive part 2

To: I Erbs <eyera3@gmail.com>
Subject: Re: [Healeys] Dave Dougan's overdrive part 2
From: Oudesluys <coudesluijs@chello.nl>
Date: Sun, 15 Nov 2009 23:19:31 +0100
That would be fine. It is the usual oil specified for several gearboxes 
with or without OD. I ran my Sunbeam gearbox in the JH on 20W50 
(specified) for over 250.000kms and it is still perfect.
20W50 will contain detergents as any engine oil. Detergents work mainly 
on combustion products and byproducts from overheated engine oil in the 
engine to prevent them from forming sludge and hard deposits which will 
eventually block oil passages. In a gearbox they are not effective as 
there are no combustion gasses, so no sludge and hard deposits will 
form. That is why a gearbox is always nice and clean inside and the oil 
always looks clean.
Nowadays oil changes for gearboxes are often not called for and many 
cars even have not got any drainplug anymore. More or less sealed for 
life. Checking the oil level is also not specified anymore in servicing 
unless there are traces of oil indicating a leak.
As there is no oil filter I do change the transmission oil once in a 
while on all my cars, say around 50.000mls, modern or not, depending on 
milage to get rid of the metal wear particles. Neccesary? I don't know. 
I do it just for peace of mind
The metal particles will float around just as well as with SAE30. A 
magnetic drainplug is a usefull accessoire to keep the steel particles 
trapped. The viscosity will be less temperature sensitive though using 
20W50.
Kees Oudesluijs
NL


I Erbs schreef:
> So I put 20/50 castrol  gtx  in my gearbox with overdrive  is this ok? If not
> how do I  flush it? Is it detergent  or not
>
> sent from my cellular PDA
> I Erbs
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