1993 850 GLT..Sod It!!

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Alistair Ross - 26 Jul 2004 13:06 GMT

Thought I'd check the old 'Jam Jar' before going on my Hols to the highlands
of Scotland. All looked OK until I noticed that the water in the header
tanks was PINK. So true to form for the 1993 850 my rad has blown and mixed
the coolant with the auto box fluid. I'm hoping that no damage has been done
to the gearbox (fingers crossed) All this meant that I had to hire a car
(Ford) it had three pedals

My question to all you folk out there is what is the best way to flush out
the gearbox so that I can get new fluid into it. someone has mentioned that
you can run the engine with the 'flow' pipe disconnected (into a bucket)
while feeding new fluid into the gear box

Any ideas, experience,advice etc etc appreciated..........ttfn......Alistair

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blurp - 26 Jul 2004 19:47 GMT

I can tell you from experience that running the engine with the
transmission fluid line disconnected is the quickest way to ensure you
need to replace the whole thing. Recently had this experience with a
motorhome (of all things) and the shade-tree mechanic working on it
did just that because the fluid inside was burnt black and there was
no drain plug in on the transmission.

Long story short once the fluid was drained the system siezed up and
that was the end of that.

My 240 has a drain plug on the bottom of the transmission pan...maybe
you need to drain, then fill with fresh fluid, then run it, then drain
again and refill etc. until you've flushed out all the old stuff. This
method will likely use lots of fluid but fluid is cheaper than parts.
I don't know if the Lucas Transmission Fix will displace any of the
coolant in the system.

I am sure there will more knowledgeable responses before long.

Good luck,
blurp

>Thought I'd check the old 'Jam Jar' before going on my Hols to the highlands
>of Scotland. All looked OK until I noticed that the water in the header
[quoted text clipped - 9 lines]
>
>Any ideas, experience,advice etc etc appreciated..........ttfn......Alistair

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Stewart Hargrave - 26 Jul 2004 22:50 GMT

>I can tell you from experience that running the engine with the
>transmission fluid line disconnected is the quickest way to ensure you
[quoted text clipped - 5 lines]
>Long story short once the fluid was drained the system siezed up and
>that was the end of that.

Oh dear; you are meant to top up at the same time as draining. But
look on the bright side - if the fluid was burnt black, the
transmission was knackered anyway.

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Stewart Hargrave - 26 Jul 2004 22:49 GMT

I have successfully flushed the autobox on my 740 using this
technique; it was easy enough - the fluid doesn't pump out so fast as
to be out of control (unlike when using this method on the power
steering).

Details are here (though you may need to adapt this for your 850):

http://brickboard.com/FAQ/700-900/TransmissionAuto.htm#7XX940FluidFlush

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Mike F - 27 Jul 2004 14:10 GMT

> I have successfully flushed the autobox on my 740 using this
> technique; it was easy enough - the fluid doesn't pump out so fast as
[quoted text clipped - 9 lines]
>
> For email, replace 'SpamOnlyToHere' with my name

This is what I did on my S70, with the exception of draining first. (I
was told by someone with lots of experience not to drain first, and I
bowed to his experience.) Assuming your '93 850 uses the same spring
clip and oring method of connecting the hoses to the radiator have a
spare of each handy. After about 12 litres, the fluid was clean, the
recommended amount is 16 litres.

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Mike F.
Thornhill (near Toronto), Ont.

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Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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