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[biggriffin]

This is just my opinion and how I do it.

Oil sucker with slightly bent tube to get right to the bottom of the pan. Refill using a Cuprinol fence sprayer as per the guide. Spot on.

I did mine few weeks back and got 3.5 litres out. I just repeat this at every service.

The gearbox and cooler takes 8.5L. and only needs doing every 80k.
Your just making work for no reason.
Do it properly once. Job done.

[78bex]

Auto box is one of those things that if it aint bust and working properly best left alone.

Given that ATF is good for nearly 100k most Omegas will only ever see 2 changes in their life at best ,unless issues with box.

Agree with Mr.BG for the effort its not really a necessary mod although would of been a good idea at the original design stage by GM

Totally agree my Mig is low miles & as far as I can ascertain has never had  new oil 

I just keep remembering a auto astra in the family a few years back that supposedly was overdue a trans oil change. I t was fine before the oil change
That box had a drain plug & a dip stick so really easy to swop the oli out 
Within a day of running on the new proper spec oil My BIL reported that  it was throwing the gearbox warning light on the dash  & refusing to change up correctly.
It went from bad to worse & he got shot in the end.
New oil on old worn clutch packs  I do wonder if that was the problem
Was that just a one off or maybe someone knows different 

[rds]

.....or burned out clutches already and the oil change was too late?

an oil change on it's own won't solve much: i would think a filter change at the same time is the recommendation. Car has had a lot of slow town work and occasional motorway use. Changes are ok at the moment, have purchased Comma semi synthetic Dexron III not VI as one supplier mentioned.

[TheBoy]

With drains and sucking, how are you cleaning the magnet and filter? Or checking thrust washer is in one piece?

Drop the sumps, its not "hard", just bloody messy!

[X30XE]

With drains and sucking, how are you cleaning the magnet and filter? Or checking thrust washer is in one piece?

Drop the sumps, its not "hard", just bloody messy!

Think their point is to avoid it being so messy rather than to negate proper dismantle-en-tation and inspection. 

[X30XE]

Auto box is one of those things that if it aint bust and working properly best left alone (and then sell it to someone else when the problems start).

Given that ATF is good for nearly 100k most Omegas will only ever see 2 changes in their life at best ,unless issues with box.

Agree with Mr.BG for the effort its not really a necessary mod although would of been a good idea at the original design stage by GM

 

[rds]

With drains and sucking, how are you cleaning the magnet and filter? Or checking thrust washer is in one piece?

Drop the sumps, its not "hard", just bloody messy!

drain/suck first then drop the sump is what i had intended so as to avoid the mess.

[rds]

Auto box is one of those things that if it aint bust and working properly best left alone (and then sell it to someone else when the problems start).

i know you're kidding, but that's not the way i work or buy!

[Nick W]

Auto box is one of those things that if it aint bust and working properly best left alone (and then sell it to someone else when the problems start).

i know you're kidding, but that's not the way i work or buy!

He's not kidding, if the trans hasn't had fluid changes already then top it up and leave it alone!

[rds]

Auto box is one of those things that if it aint bust and working properly best left alone (and then sell it to someone else when the problems start).

i know you're kidding, but that's not the way i work or buy!

He's not kidding, if the trans hasn't had fluid changes already then top it up and leave it alone!

Seriously? no filter change, no clean out? Why? You wouldn't treat a motorcycle multi-plate wet clutch, or an overdrive box, that way (ATF often used there too).

[Nick W]

Auto box is one of those things that if it aint bust and working properly best left alone (and then sell it to someone else when the problems start).

i know you're kidding, but that's not the way i work or buy!

He's not kidding, if the trans hasn't had fluid changes already then top it up and leave it alone!

Seriously? no filter change, no clean out? Why? You wouldn't treat a motorcycle multi-plate wet clutch, or an overdrive box, that way (ATF often used there too).

I agree that treating it as a sealed unit is a bad idea, but the fluid changes should have happened at much lower mileages than we're now talking about. It is not uncommon for a high mileage trans to fail after doing such a fluid change, which seems to be because the new fluid isn't carrying the friction materials.


Omegas don't suffer from unreliable transmissions, but they're now at the age where legitimate wear must be considered both reasonable and acceptable.

[rds]

I'm at 62k now hence the thought of this job, now.

The other consideration is that i can't find a better example of this car (had it from  new) and worse still, no one seems to make estates with this carrying ability, style, at a reasonable price. I dont want to change it for something that is laden with more "crap toys".

[Doctor Gollum]

I'm at 62k now hence the thought of this job, now.

The other consideration is that i can't find a better example of this car (had it from  new) and worse still, no one seems to make estates with this carrying ability, style, at a reasonable price. I dont want to change it for something that is laden with more "crap toys".

Too late, every 40k/4 years would have been much better

[rds]

agreed, but not half as bad as at 80k!

[TheBoy]

I would definately change the fluid and clean the filter and magnet, no matter how long its been in.