Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: deviator on 08 September 2009, 12:27:51

Title: What engines does the manual box fit?
Post by: deviator on 08 September 2009, 12:27:51
Hello,

Took a manual box off a 2.6 and I need to know what other engines it fits as I have someone interested in buying it.

Cheers,

Dave
Title: Re: What engines does the manual box fit?
Post by: tunnie on 08 September 2009, 14:01:24
err everthing ever fitted to an Omega... but.

Check which one it is, only R28 can handle the torque of the 3.0/3.2
Title: Re: What engines does the manual box fit?
Post by: deviator on 08 September 2009, 14:08:05
Quote
err everthing ever fitted to an Omega... but.

Check which one it is, only R28 can handle the torque of the 3.0/3.2

Cheers for the quick reply, I have a funny feeling it's an AR35.
Title: Re: What engines does the manual box fit?
Post by: GastronomicKleptomaniac on 08 September 2009, 14:12:54
Quote
Quote
err everthing ever fitted to an Omega... but.

Check which one it is, only R28 can handle the torque of the 3.0/3.2

Cheers for the quick reply, I have a funny feeling it's an AR35.

AR35 is the tough auto box IIRC :y
Title: Re: What engines does the manual box fit?
Post by: Kevin Wood on 08 September 2009, 14:17:06
I'm guessing it'll at least need a different bellhousing on a tractor though...

Kevin
Title: Re: What engines does the manual box fit?
Post by: tunnie on 08 September 2009, 14:19:34
Quote
Quote
Quote
err everthing ever fitted to an Omega... but.

Check which one it is, only R28 can handle the torque of the 3.0/3.2

Cheers for the quick reply, I have a funny feeling it's an AR35.

AR35 is the tough auto box IIRC :y

AR35's are autos.....
Title: Re: What engines does the manual box fit?
Post by: deviator on 08 September 2009, 14:45:35
Oh ok, I thought I had read that on the side, must be me being stupid.

It's definitely a manual. Maybe it's an r35. I will check it tonight.
Title: Re: What engines does the manual box fit?
Post by: Kevin Wood on 08 September 2009, 15:20:14
Quote
Oh ok, I thought I had read that on the side, must be me being stupid.

It's definitely a manual. Maybe it's an r35. I will check it tonight.

Probably an R25, then, if it's manual and came off a 2.6?

Kevin
Title: Re: What engines does the manual box fit?
Post by: deviator on 08 September 2009, 22:05:53
OK it's got an identity crisis.

It says R25-R28 on the side, so which is it? Or do both share the same case? Are all Omegas hydraulic clutch?

So it will fit any omega, but may need to change bell-housing over.
Title: Re: What engines does the manual box fit?
Post by: tunnie on 08 September 2009, 22:15:24
Quote
OK it's got an identity crisis.

It says R25-R28 on the side, so which is it? Or do both share the same case? Are all Omegas hydraulic clutch?

So it will fit any omega, but may need to change bell-housing over.

Its either one or the other, can't be both, most likey R25 if taken of 2.6

Bell-housing will only need to be changed if your fitting it to the 2.5 bmw diesel, not sure about Vx 2.2 diesel lump  :-/
Title: Re: What engines does the manual box fit?
Post by: tmx on 08 September 2009, 22:32:47
My MV6s R28 just had a GM P/N stamped into it and R28
Title: Re: What engines does the manual box fit?
Post by: deviator on 08 September 2009, 22:35:38
Definately says that on the side.

I will take a pic when I get a chance. It maybe a few days before I can get into the garage again.

I must say thanks again to everyone for replying.
Title: Re: What engines does the manual box fit?
Post by: deviator on 08 September 2009, 23:31:42
OK, I like a decent mystery, so I went out to the garage again. This iss by no means an easy task which is why I wasn't going to do it tonight, but I was intrigued and so here are the pics.....
Part number....
(http://img143.imageshack.us/img143/8493/08092009331.jpg)
Then the mysterious R25-R28
(http://img143.imageshack.us/img143/3935/08092009332.jpg)
And then the other number next to the above....
(http://img233.imageshack.us/img233/8923/08092009333.jpg)

I hope this sheds some light on it!
Title: Re: What engines does the manual box fit?
Post by: Omegatoy on 09 September 2009, 08:49:08
if its hydraulic clutch its r28 if cable its r 25 thats a standard gm designation on there buddy :y
Title: Re: What engines does the manual box fit?
Post by: deviator on 09 September 2009, 09:21:21
Quote
if its hydraulic clutch its r28 if cable its r 25 thats a standard gm designation on there buddy :y


Thanks mate, thats answered my question.

So I have an R28 (hydraulic clutch) that will fit any Omega (maybe not TD without bell housing swap).

Cheers again guys. I now have the info I needed. Lets hope he wants it!
Title: Re: What engines does the manual box fit?
Post by: Matchless on 09 September 2009, 11:30:36
Quote
if its hydraulic clutch its r28 if cable its r 25 thats a standard gm designation on there buddy :y

Err, no.
All R25 and R28 are both hydraulic clutch when fitted into Omegas.
It says R25/28 on the case because the casting is common between them, the gear clusters and ratios differ slightly between 2.5/2.6/3.0/3.2 and also with date.
Your box will fit any omega V6 and ratios would be usable on any but ideal for the 2.5/2.6
Title: Re: What engines does the manual box fit?
Post by: deviator on 11 September 2009, 13:18:26
Oh, can anyone tell from the part number on the box (In the pics) anyone got access to the EPC?

Thanks in advance.
Title: Re: What engines does the manual box fit?
Post by: Kevin Wood on 11 September 2009, 13:51:31
Quote
Oh, can anyone tell from the part number on the box (In the pics) anyone got access to the EPC?

Thanks in advance.

The part number is cast into the casing too, so it won't be model-specific. Does the box not have a sticker or metal tag on it bearing a part number?

Kevin