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[Jabe]

OK so after reading through about 20 threads, most of them start of with different claims then usually after reading through the thread it would be suggested that the 2.6 / 3.2 Omega's came with the 4.22 differential.

So to clear up the air can anyone confirm one last time if the 2.6 / 3.2 Omega's came with the 4.22 diff from the factory? (or if other options were available from the factory?)

Thanks!

[RobG]

Standard ratio on 2.6 auto was 4.22:1        3.2 auto was 3.90:1
Manuals had the 3.90:1

[Jabe]

Standard ratio on 2.6 auto was 4.22:1        3.2 auto was 3.90:1
Manuals had the 3.90:1

Thanks, that clears that up. Also found this whilst randomly browsing the site which was helpful. Can't seem to find one for the pre-facelifts as a comparison though? Maybe its there and I'm just playing blind 

So in theory, having the 3.90 diff on the 2.6 would result in better acceleration?

[cem_devecioglu]

higher the ratio compared to previous ,better the acceleration..
 
if its not manual , not worth bothering

[Nick W]

higher the ratio compared to previous ,better the acceleration..
 
if its not manual , not worth bothering

A high ratio is a low number.

So a 3.0 ratio is higher than a 4.0.

A high number(therefore a lower ratio) will probably accelerate better, but it is dependent on a bunch of other factors too.

[cem_devecioglu]

higher the ratio compared to previous ,better the acceleration..
 
if its not manual , not worth bothering

A high ratio is a low number.

So a 3.0 ratio is higher than a 4.0.

A high number(therefore a lower ratio) will probably accelerate better, but it is dependent on a bunch of other factors too.

I know but thats how producers number it.. 

[Jabe]

higher the ratio compared to previous ,better the acceleration..
 
if its not manual , not worth bothering

Haha, ssshhh it will be an auto, so get over it

According to this thread, the 3.45 diff teamed with an auto kicks some serious ass!

What about cruising RPM's though? I wish they had done some tests @ 120kmph whilst conducting those readings. I'm assuming by swapping out a 4.22 with a 3.45 you would see much higher engine load when cruising.

[Mv8.com]

Standard ratio on 2.6 auto was 4.22:1        3.2 auto was 3.90:1
Manuals had the 3.90:1

So in theory, having the 3.90 diff on the 2.6 would result in better acceleration?

Other way around.

The 3.2 is over geared. It runs out of puff at about 130.

Fit a 4.2 dif in the 3.2 auto and it will accelerate quicker, rev on past 130 and feel more lively.

It will also rev 3-400 rpm higher at cruising speeds though, and fuel economy suffers slightly.

[Mv8.com]

Problem is the 4.2 dif is already the quickest accelerating dif available.

[cem_devecioglu]

higher the ratio compared to previous ,better the acceleration..
 
if its not manual , not worth bothering

Haha, ssshhh it will be an auto, so get over it

According to this thread, the 3.45 diff teamed with an auto kicks some serious ass!

What about cruising RPM's though? I wish they had done some tests @ 120kmph whilst conducting those readings. I'm assuming by swapping out a 4.22 with a 3.45 you would see much higher engine load when cruising.

nope.. 3.45 is worst ..check carefully

[Kevin Wood]

higher the ratio compared to previous ,better the acceleration..
 
if its not manual , not worth bothering

Haha, ssshhh it will be an auto, so get over it

According to this thread, the 3.45 diff teamed with an auto kicks some serious ass!

What about cruising RPM's though? I wish they had done some tests @ 120kmph whilst conducting those readings. I'm assuming by swapping out a 4.22 with a 3.45 you would see much higher engine load when cruising.

nope.. 3.45 is worst ..check carefully

Agreed. 3.45 with a petrol engine will be terrible - tractors only.

Also, remember that those graphs show theoretical speeds in gears. If the engine doesn't have enough grunt to get there it won't happen.

4.22 in a 3.2 auto is probably a worthwhile mod, as the auto is quite high geared. (mine is far from bogging down at 130, mind.. apparently) 

4.22 might be a bit much in a manual, as that is lower geared anyway, and the low gears in that gearbox are already pretty short, IMHO. IIRC, someone on here tried it (after a 2.6-3.2 conversion) and went for the 3.9 after trying it.

2.6 manual might benefit from a 4.22, but the auto already has it.

[SMD]

I suspect I may have a rumbling diff, this is a perfect excuse to fit a 4.22 diff! 

So a 2.2 or 2.6 should have a 4.22 diff ?

[cem_devecioglu]

I suspect I may have a rumbling diff, this is a perfect excuse to fit a 4.22 diff! 

So a 2.2 or 2.6 should have a 4.22 diff ?

2.6 have a 4.22 but not sure for 2.2..

[albitz]

My 2.5 diff has a leaky pinion seal.I have a spare 3.0 diff (both auto cars) which I could bung in there rather than change the pinion seal.Problem is,I dont know what ratio aeither a 2.5 or 3.0 are.
Might be best to just change the seal I suppose.

[Mv8.com]

I suspect I may have a rumbling diff, this is a perfect excuse to fit a 4.22 diff! 

So a 2.2 or 2.6 should have a 4.22 diff ?

2.2 auto or manual, and the AUTO 2.6 have a 4.22:1 dif.
http://www.omegaowners.com/forum/index.php?topic=90453.0