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[WizardRally]

Hi all,
Just a quick shout out for advise.
After a successful weekend changing the Cambelt, plugs and oil my attention turns to the gearbox.
The car is a 2003 with the ar25 gearbox. It’s done 107k miles but has never had any gearbox work done.
I can’t feel or hear any issues from the box but I’m thinking maybe I should change the oil and filter.
What’s you thoughts?

[Bigron]

What colour is the oil and what does it smell like?
You owe it to the gearbox at least to check. If brown and smelly, change it!

Ron.

[biggriffin]

There is a guide, filters can be washed in meths or tizer, and reused, need about 8.5L of dex3. Don't forget to blow the cooler out too.

[WizardRally]

Well I have order the gaskets, filter and oil to change at the weekend.
How do you clear the cooler?
Does it need bleeding after incase of an air lock.

[Andy B]

I wouldn't worry too much over the cooler as you cant drain the torque converter

[Doctor Gollum]

I wouldn't worry too much over the cooler as you cant drain the torque converter

Does it not have a drain plug?

[Andy B]

I wouldn't worry too much over the cooler as you cant drain the torque converter

Does it not have a drain plug?

You asking or telling?  As the auto box was apparently 'sealed for life' I'd doubt it.
I didn't look, just emptied the sump pans

[Doctor Gollum]

Asking... A simple rotation of the crank would surely reveal it...

[JamesV6CDX]

Asking... A simple rotation of the crank would surely reveal it...

Taken a fair few Omega trannies and TC's apart over the years, never seen a TC train plug

[biggriffin]

Just blow thro the cooler pipes, that emptys the cooler.

[Kevin Wood]

There's no way to drain the TC apart from removing it - even then, I think you'd struggle. 

The flow into the cooler is the return from the TC, I believe, so it may be possible to bleed some fluid from the cooler return once you've refilled the main sump and hence flush out the old fluid from the TC. Probably not worth the hassle though.

[TheBoy]

I'd probably not be overly concerned with getting ATF out of anywhere but the sumps, as the TC holds the most, and is hard to empty (and impossible without removing the gearbox).  The cooler holds little anyway....

...if you're that concerned, or the fluid really is in a bad state, just repeat the process in a few weeks.


Clean up the sludge off the magnet in the large sump while its off.

[robson]

I had my auto box oil changed I doubt that the garage did anything with the filter but the car seems to be running much sweeter.Imagination?

[Shackeng]

I'd probably not be overly concerned with getting ATF out of anywhere but the sumps, as the TC holds the most, and is hard to empty (and impossible without removing the gearbox).  The cooler holds little anyway....

...if you're that concerned, or the fluid really is in a bad state, just repeat the process in a few weeks.


Clean up the sludge off the magnet in the large sump while its off.

I'm sure the last time I did one, I got a large proportion out of the sumps. What is the total, 8 pts/litres? If so I put in over 5.

[biggriffin]

I'd probably not be overly concerned with getting ATF out of anywhere but the sumps, as the TC holds the most, and is hard to empty (and impossible without removing the gearbox).  The cooler holds little anyway....

...if you're that concerned, or the fluid really is in a bad state, just repeat the process in a few weeks.


Clean up the sludge off the magnet in the large sump while its off.

I'm sure the last time I did one, I got a large proportion out of the sumps. What is the total, 8ltrs pts/litres? If so I put in over 5.

Done a few now, and I haven't put less than 8L in. Both sumps off, blow cooler tro, then have cuppa while it all drips out, then refill with fence sprayer, road test and check.