Automatic gearbox oil

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Re: Automatic gearbox oil

by Orlando St.R » Sun Jul 21, 2019 5:20 pm

Excellent. Thanks for your advice, Glyn. Much appreciated.

Re: Automatic gearbox oil

by Glyn Ruck » Sun Jul 21, 2019 12:20 am

Yes Orlando. Type F/G fluids are miscible with Dexron II. Running on a mixture in PS application will do no harm until your next scheduled full change & will give you some of the antiwear benefits.

Re: Automatic gearbox oil

by Orlando St.R » Sat Jul 20, 2019 9:25 pm

Glyn Ruck wrote: Sun Feb 03, 2019 9:28 pm M2C33F or G products are the very best for Power Steering on our S Types. They were designed to hold together a particularly fragile range of Ford transmissions & offer really superior wear protection as a result. To be used if you want long life from your PAS pump & box.
Hi Glyn. Here's hoping I can make it through the deluge of spam. My low pressure power steering hose is leaking at the banjo connection to the pump, so I need to drain the reservoir and install a new hose clamp.

Bearing in mind your comments about the superior properties of Type F/G...
(a) Is Type F/G miscible with Dexron II, that I have in there at the moment, bearing in mind that most of it will be removed when I empty the reservoir?
(b) Or, shall I just refill with Dexron II and change at the service next May?

Your thoughts and observations would be very welcome.

Re: Automatic gearbox oil

by johngosnell » Tue Mar 12, 2019 1:55 pm

The Rover cooler is exactly the same, with the cooler at the bottom of the water rad

John

Re: Automatic gearbox oil

by cass3958 » Tue Mar 12, 2019 12:14 pm

The oil cooler for the gear box oil on my car is in the base of the radiator. I have two pipes coming from the gearbox on the right hand side, presumably feed and return, that go to the bottom of the water radiator. I do not have a separate gearbox oil cooler although I do have a power steering fluid cooler which is just a pipe with aluminium fins just in front of the sump bowl under the crankshaft pulley.
The stainless steel braided hoses are from the gearbox and the PAS cooler you can see with the fins in the photo.
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Re: Automatic gearbox oil

by johngosnell » Tue Mar 12, 2019 10:24 am

One other thing regarding drain back, were the BW 35 boxes fitted with oil coolers as it was suggested on the Rover forum to resolve drain back issues that a check valve is fitted to the return pipe on the gearbox cooler as this would stop the drainage. The gearbox has a check valve fitted in the control unit but they very rarely work.

Regards John

1B1257BW

Re: Automatic gearbox oil

by cass3958 » Tue Mar 12, 2019 9:50 am

Thanks John I will bear that in mind if mine starts leaking.

Re: Automatic gearbox oil

by johngosnell » Tue Mar 12, 2019 9:20 am

with regard to oil leaks from the auto box, for anybody that has the BW 35 box there is an oil seal that is a known problem. The seal is located just below the inhibitor switch and is the termination end for the gear selector cross shaft , it is quite small about 3/4" inch outside diameter but is an easy fix. Plate 38 no 3, PT NO 9769. It took about a total of 3/4 hour to remove and replace on my sons Ford Zodiac.

See Ebay one stop gearbox shop


Regards John


1B1257BW

Re: Automatic gearbox oil

by cass3958 » Thu Feb 14, 2019 2:14 pm

I agree with "Period correct" as I was once told that Jaguar built in the oil leaks as an anti rust mechanism for the underside of the car.
No Waxoyl (1972) or stone chip paint in the 60s.lol.

Re: Automatic gearbox oil

by Orlando St.R » Wed Feb 13, 2019 8:39 pm

Hi Alan. Yes, I have been down that route, too. It comes from every available joint/seam/thread/bolt/nut! Yes, it really does come down the threads, particularly the brake band adjusters. Of course, on the DG box, many of the ancillaries are bolted on to the outside - rear extension, solenoid, anti-creep switch, etc - and every one is a leak opportunity. In later models, these devices were either done away with or mounted internally.

Graham Whitehouse also tells a story about a gentleman who purchased an Alvis and took it back to the factory, complaining about leaking ATF. The Alvis chaps made him up a nice drip tray! They knew they couldn't stop it leaking.

Graham says he can stop them leaking by sealing every joint/seam/thread/bolt/nut. But he will only do that as part of a full rebuild.

I've come to think of my leaks as being 'period correct'. :D

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