Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: mike9570 on 28 July 2011, 12:34:19

Title: autobox info needed
Post by: mike9570 on 28 July 2011, 12:34:19

hi , does anybody know what the 2 letters mean on my gearbox( ar25 zg 2.2 on a 2001 plate) and do they need to be the same when i get the box changed.
cheers

Title: Re: autobox info needed
Post by: tango on 28 July 2011, 15:56:07

dont know what they mean but i assume you need to match it if you gonna replace

Title: Re: autobox info needed
Post by: Richard A on 28 July 2011, 18:44:50

Which letters, AR25 is the 'lesser auto box' but fine for the model of Omega it is fitted, the AR35 is used on the 3.0 litre petrol and the 2.5 diesel, a strong box to cope with the higher 'torgue'.
richarda

Title: Re: autobox info needed
Post by: erubus on 28 July 2011, 20:20:28

AR - Automatic Rear wheel drive, the 25 is the amount of torque it can handle i think, 250 lbft and 350 for the AR35. (could be wrong there)  the autos in cavaliers etc are AF something or others.  I'm pretty sure the internals are the same for fwd and rwd boxes

the 2.5td was fited with the AR25 and thats why they dont last more than 120'000 miles.  BMW only used the AR35 with that engine, although they used the proper name for it, the GM 4L30E (handy if (or more likely WHEN) you need to fix it, Ive never had one that works yet)

Title: Re: autobox info needed
Post by: Shackeng on 28 July 2011, 20:42:35

Quote

Which letters, AR25 is the 'lesser auto box' but fine for the model of Omega it is fitted, the AR35 is used on the 3.0 litre petrol and the 2.5 diesel, a strong box to cope with the higher 'torgue'.
richarda

I wish it had been, then I would not have had to buy an AR 35 to cope with the chipped torque on my TD!

Title: Re: autobox info needed
Post by: mike9570 on 29 July 2011, 06:22:35

the zg at the end . do they need to match or can i fit any ar25 box.

Title: Re: autobox info needed
Post by: 2woody on 29 July 2011, 09:53:41

all GM components are given a two-letter code, called an "ident". This is a unique identifier used on the production line and for spares. Usually on a yellow sticker.

AR25 is just a title given to the gearbox type by Opel, it's actually an Aisin-Warner 4L-35E.

regarding your transmission, I'd definitely replace only with another "ZG"

Title: Re: autobox info needed
Post by: mike9570 on 29 July 2011, 11:07:52

Quote

all GM components are given a two-letter code, called an "ident". This is a unique identifier used on the production line and for spares. Usually on a yellow sticker.

AR25 is just a title given to the gearbox type by Opel, it's actually an Aisin-Warner 4L-35E.

regarding your transmission, I'd definitely replace only with another "ZG"

what problems would i face if i fitted one with diffrent letters lets say a ar25 dn or a dg.

Title: Re: autobox info needed
Post by: sassanach on 29 July 2011, 12:11:54

bog all as far as im concerned, i've never taken any notice of anything other than ar25 or ar35 :y

Title: Re: autobox info needed
Post by: JueV6 on 29 July 2011, 12:20:31

Quote

bog all as far as im concerned, i've never taken any notice of anything other than ar25 or ar35 :y

correct if you can get an AR35 USE it

Title: Re: autobox info needed
Post by: JueV6 on 29 July 2011, 12:21:48

I need help with an AR25 too

How easy to change output shaft bearing?

Title: Re: autobox info needed
Post by: mike9570 on 29 July 2011, 12:22:16

crap to late just got a ar25 with tc , thanks guys just got workout how to fit it.