Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: smokingomega on 16 April 2010, 11:34:27

Title: Gearbox and Diff oil spec
Post by: smokingomega on 16 April 2010, 11:34:27

Hi all

I`m just wanting to know what grade oil should be used in a manual 2.5TD gearbox and Diff. As far as I know its done 157000 miles and never been changed.

Cheers

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 11:39:14

Auto or manual gearbox

Title: Re: Gearbox and Diff oil spec
Post by: smokingomega on 16 April 2010, 11:39:38

Manual

Title: Re: Gearbox and Diff oil spec
Post by: 2woody on 16 April 2010, 11:45:25

it's the same oil for both boxes - the red Auto Transmission Fluid.

diff oil on the diff, tho.

it does give the figures in the driver's handbook

Title: Re: Gearbox and Diff oil spec
Post by: smokingomega on 16 April 2010, 11:47:33

what do you mean diff oil for diff? EP90?

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 11:49:26

Quote

it's the same oil for both boxes - the red Auto Transmission Fluid.

diff oil on the diff, tho.

it does give the figures in the driver's handbook

Nah its not.

DexIII in the auto box

80-90 hypoid for the diff (although I rate BOA90LS and the LSD aditive seems to help the seals last longer)

And the gear box is a fully synth gear oil...the viscosity of which escapes me at the moment

Title: Re: Gearbox and Diff oil spec
Post by: 2woody on 16 April 2010, 11:54:27

I need to check really, but I was fairly sure that the manuals use ATF

still, I could be coasting towards a "look it up before opening gob" moment....!

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 12:07:05

Quote

I need to check really, but I was fairly sure that the manuals use ATF

still, I could be coasting towards a "look it up before opening gob" moment....!

Lol, I know some Vx manuals do but, the Omega ZF derivative is a gear oil of SAE75W-85 API GL4 spec

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 12:16:38

The getrag units used on earlier opel/Vx rear wheel platforms were ATF from memory

Title: Re: Gearbox and Diff oil spec
Post by: smokingomega on 16 April 2010, 12:18:44

So its 80-90 for diff and not too sure about manual box.

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 12:19:56

No, manual box oil is above   :y

Title: Re: Gearbox and Diff oil spec
Post by: 2woody on 16 April 2010, 12:21:29

surely the manual diesel is Getrag as well ?

actually I've just looked it up, it is

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 12:23:02

Quote

surely the manual diesel is Getrag as well ?

actually I've just looked it up, it is

Info I have states that its a ZF derivative.....

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 12:31:20

Just digging further.

Although the Senator and Omega share the same gearbox number in the form of R25 and R28.....they appear to be different boxes.

Further digging shows that they even have a different oil quantity and casing.

Some years ago I found a paper on them and the information sudgested that the box was a ZF unit made under license.

Title: Re: Gearbox and Diff oil spec
Post by: Marks DTM Calib on 16 April 2010, 12:33:56

TIS makes reference to the following:

The use of the modified R 25/ R 28 manual transmission in the Omega - B has lead to the introduction of a new high temperature transmission fluid.

Quality  SAE 80 Kluber - 1.2 litres