Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: mantagte on 02 June 2011, 19:34:12

Title: auto gearbox prob
Post by: mantagte on 02 June 2011, 19:34:12
car sluggish no go
checked auto box oil
loads came out of filler hole
car is level
was expecting red oil
got lightish brown yuck
what gives?
Title: Re: auto gearbox prob
Post by: Andy B on 02 June 2011, 19:36:36
Quote
....
checked auto box oil
loads came out of filler hole
car is level ......

............ and the engine was running & had been cycled through D & R  ::) ::) ::) ::) :y

but it sounds as though you're over due an ATF change if what's in there is brown  :y
Title: Re: auto gearbox prob
Post by: Entwood on 02 June 2011, 19:38:38
Was the engine running, gearbox warm, gearbox in neutral, car level ???

Those are the parameters for a CORRECT check of the level.

Even given those parameters it is expected that some oil will leak out as there is a physical change to the ATF as it gets old ... simply put the polymer chains that the ATF is made of get longer as the oil gets old/breaks down. Longer chains take up more room so the oil sort of expands !!  If that makes sense. ....   :)

Oil is red to start with but changes colour over time/use. Even if you were to drop both sumps you would only change half the ATF .. so it still would not be red after even a short run as the old mixes with the new .. :)
Title: Re: auto gearbox prob
Post by: mantagte on 02 June 2011, 19:47:57
engine was off
car was cold last used yesterday

So an oil and filter change should cure the problem?
Title: Re: auto gearbox prob
Post by: dbug on 02 June 2011, 19:48:48
Quote
Was the engine running, gearbox warm, gearbox in neutral, car level ???

Those are the parameters for a CORRECT check of the level.

Even given those parameters it is expected that some oil will leak out as there is a physical change to the ATF as it gets old ... simply put the polymer chains that the ATF is made of get longer as the oil gets old/breaks down. Longer chains take up more room so the oil sort of expands !!  If that makes sense. ....   :)

Oil is red to start with but changes colour over time/use. Even if you were to drop both sumps you would only change half the ATF .. so it still would not be red after even a short run as the old mixes with the new .. :)

You sure about that mate - ATF consists of long polymer chains which break down (shorten) with age and shear.  Never heard of polymer chains growing with age.
Title: Re: auto gearbox prob
Post by: Entwood on 02 June 2011, 19:54:26
Quote
Quote
Was the engine running, gearbox warm, gearbox in neutral, car level ???

Those are the parameters for a CORRECT check of the level.

Even given those parameters it is expected that some oil will leak out as there is a physical change to the ATF as it gets old ... simply put the polymer chains that the ATF is made of get longer as the oil gets old/breaks down. Longer chains take up more room so the oil sort of expands !!  If that makes sense. ....   :)

Oil is red to start with but changes colour over time/use. Even if you were to drop both sumps you would only change half the ATF .. so it still would not be red after even a short run as the old mixes with the new .. :)

You sure about that mate - ATF consists of long polymer chains which break down (shorten) with age and shear.  Never heard of polymer chains growing with age.

OK .. perhaps it's t'other way .. :(  .. but the net effect is that the ATF expands as it gets old ... do lots of sheared chains take up more room than the original unsheared ons ???

Old oil takes up more space than new oil .... I know that bit is correct !!!  :)
Title: Re: auto gearbox prob
Post by: Andy B on 02 June 2011, 19:55:31
Quote
engine was off
car was cold last used yesterday

So an oil and filter change should cure the problem?


An ATF change won't do any harm.  ;)

http://www.omegaowners.com/forum/YaBB.pl?num=1289757627

why didn't someone say the link didn't work?  ::)
Title: Re: auto gearbox prob
Post by: dbug on 02 June 2011, 19:58:21
Quote
Quote
Quote
Was the engine running, gearbox warm, gearbox in neutral, car level ???

Those are the parameters for a CORRECT check of the level.

Even given those parameters it is expected that some oil will leak out as there is a physical change to the ATF as it gets old ... simply put the polymer chains that the ATF is made of get longer as the oil gets old/breaks down. Longer chains take up more room so the oil sort of expands !!  If that makes sense. ....   :)

Oil is red to start with but changes colour over time/use. Even if you were to drop both sumps you would only change half the ATF .. so it still would not be red after even a short run as the old mixes with the new .. :)

You sure about that mate - ATF consists of long polymer chains which break down (shorten) with age and shear.  Never heard of polymer chains growing with age.

OK .. perhaps it's t'other way .. :(  .. but the net effect is that the ATF expands as it gets old ... do lots of sheared chains take up more room than the original unsheared ons ???

Old oil takes up more space than new oil .... I know that bit is correct !!!  :)

Yep you got it - knew my B Sc Hons in Polymer Technology would come in useful one day  ;)
Title: Re: auto gearbox prob
Post by: mantagte on 02 June 2011, 21:45:00
how much oil do i need ?
it is d111 isn't it?
Title: Re: auto gearbox prob
Post by: Andy B on 02 June 2011, 21:49:00
Quote
how much oil do i need ?
it is d111 isn't it?

You'll need about 5 or 6 litres http://www.omegaowners.com/forum/YaBB.pl?num=1289757627
Title: Re: auto gearbox prob
Post by: henryd on 02 June 2011, 22:48:24
Quote
car sluggish no go
checked auto box oil
loads came out of filler hole
car is level
was expecting red oil
got lightish brown yuck
what gives?

Lightish brown yuk, hmmm, are you Sure the oil cooler in the rad is ok and not leaking coolant into it, normally old ATF is dark and very smelly
Title: Re: auto gearbox prob
Post by: mantagte on 02 June 2011, 23:08:06
its not watery/oily like when hg goes
its like its been cooked its very thin
like water but still oily to the touch
Title: Re: auto gearbox prob
Post by: mantagte on 03 June 2011, 18:02:06
ok changed oil/filter
car is still sluggish
til put in 1st then
it seems to go 1st-4th
reverse is fine
 :'( :'( :'(
Title: Re: auto gearbox prob
Post by: Varche on 03 June 2011, 19:38:48
Right my tip. I am going to call it Varches Fix.Lift bonnet and check that every relay and plug is actually seated(fully home) next the battery. There is a big blue plug in particular. My theory. Rough roads and potholes.

Free give it a go, you never know..........................
Title: Re: auto gearbox prob
Post by: mantagte on 03 June 2011, 23:14:18
sorted, broken wire 6 inches from ecu
thanks for the idea varche :y