ENV Diff

[garryseries3]

Hi all this diff is under the Series 2 I have I am told it is a EMV Diff can anyone tell me a bit more about these diffs.
Garryhttp://https://www.aulro.com/afvb/images/imported/2009/06/1018.jpghttps://www.aulro.com/afvb/images/imported/2009/06/1018.jpg

[Dinty]

G'day All, It would be a ENV, but sadly I don't know much about them cheers Dennis:angel:

[Grumndriva]

I've never seen one in the flesh, but according to one of my books, the ENV diff was fitted to Series 2 vehicles needing something heavier duty than the Rover diff and axles. It was apparently fitted to 110 inch forward control and 109 one ton models. Diana will surely know all about it.

[Lotz-A-Landies]

As always Dinty has hit the nail on the head, or at least I'm 90% sure that is an ENV diff. The uncertainty is because of the unusual angle of the only pic I can view. A few more images would confirm the diagnosis.

https://www.aulro.com/afvb/images/imported/2009/06/975.jpg

The ENV is a bit of a orphan regarding Land Rover diffs, although they were also used on some 1950's Morris-Commercials and possibly Vauxhall. The ENV company I have been told was a joint venture between Eaton, Nuffield and Vauxhall, but have never been able to confirm the story.

In Land Rover they were an option on Series 2a, usually optioned onto the Station Wagons and they were standard equipment on the rear Series 2a Forward Controls from about 1965 and at the very end of S2a F/C also on the front. They are also standard on the front and rear of Series 2b 110 forward controls, Series 2a 1 Ton models and the prototype 101 forward controls. They were superseded by the Salisbury diff in the late series 2a.

They are a spiral bevel diff, there is only 1 ratio (4.7:1) and they have an axle that requires you to remove the stub axle before you can remove it from the axle housing.

They are only good for people like me with forward control Land Rovers and people who want an extra strong diff in the rear of a short wheelbase. Most parts are made of unobtanuim, although I have a couple of pairs of rear halfshafts for them.

As far as I know there are no locking hemospheres for the ENV although Mal Story did prototype the MaxiDrive locking diff on the ENV in his 1980's sidewinder project but there is only that one example in captivity. (Still on the road mind you - the diff not the sidewinder.)

https://www.aulro.com/afvb/images/imported/2012/12/264.jpg

Is that enough info for you?

Diana

[garryseries3]

As always Dinty has hit the nail on the head, or at least I'm 90% sure that is an ENV diff. The uncertainty is because of the unusual angle of the only pic I can view. A few more images would confirm the diagnosis.

https://www.aulro.com/afvb/images/imported/2009/06/975.jpg

The ENV is a bit of a orphan regarding Land Rover diffs, although they were also used on some 1950's Morris-Commercials and possibly Vauxhall. The ENV company I have been told was a joint venture between Eaton, Nuffield and Vauxhall, but have never been able to confirm the story.

In Land Rover they were an option on Series 2a, usually optioned onto the Station Wagons and they were standard equipment on the rear Series 2a Forward Controls from about 1965 and at the very end of S2a F/C also on the front. They are also standard on the front and rear of Series 2b 110 forward controls, Series 2a 1 Ton models and the prototype 101 forward controls. They were superseded by the Salisbury diff in the late series 2a.

They are a spiral bevel diff, there is only 1 ratio (4.7:1) and they have an axle that requires you to remove the stub axle before you can remove it from the axle housing.

They are only good for people like me with forward control Land Rovers and people who want an extra strong diff in the rear of a short wheelbase. Most parts are made of unobtanuim, although I have a couple of pairs of rear halfshafts for them.

As far as I know there are no locking hemospheres for the ENV although Mal Story did prototype the MaxiDrive locking diff on the ENV in his 1980's sidewinder project but there is only that one example in captivity. (Still on the road mind you - the diff not the sidewinder.)

https://www.aulro.com/afvb/images/imported/2012/12/264.jpg
https://www.aulro.com/afvb/[/IMG]
Is that enough info for you?

Diana

Thanks Diana
So if I wanted a stronger rear diff for a short wheel base this would be a good option being stubbier than a salsibury? Is it as reliable though? You said parts are unobtainable now but is there much that goes wrong with these diffs it has been behind a 2.25 petrol 109" wagon. The picture of the diff housings you included are identical to the one under the car.
https://www.aulro.com/afvb/[/IMG]
This a rear view of the diff do you think it could handle a Tdi motor in a Series vehicle?
Kindest regards
Garry

[Blknight.aus]

IMHO they fit about 2/3s of the way from stock rover diff and the sals...

more than enough for a series or a stage 1 with a carbied 3.5 in it.

[Lotz-A-Landies]

IMHO they fit about 2/3s of the way from stock rover diff and the sals...

more than enough for a series or a stage 1 with a carbied 3.5 in it. Would agree with that sentiment, the size of the pinion is what lets them down but the axle size, crownwheel and hemisphere are more than sufficient and I doubt that you could ever over load your bonneted control Landy the way people overload the forward controls (with 36" wheels).

If you are going the way of a Tdi you may want to upgrade your ratios to 3.54:1 in which case the ENV will be a problem.

If you do decide on a change, I am always on the lookout for ENV spares for my three S2B so contact me and we can negotiate a price.

Diana