Thread: Diff types in series beasts

Originally Posted by landyfromanuthaland

I hear of different types of diffs in the series, ie ENV, Rover,Salisbury, if u have an ENV in the rear would u expect to have same in front? I have salisbury in my old 3 but the fronts a Rover, could be ENV I cant tell the diff, would this be normal? surely the front diff would need to be the same ratio as [LIST][*]the rear? I can see problems with a hving a different ratio in the front to the rear, so I wonder now if my front diff is matched to the rear ratio wise or am I talking poo?

1. Rover The diff we all know and luv
2. ENV The diff very few people know - the housing is round like a basket ball
3. Salisbury - the rear diff on very late S2a,S3 and County and Defender long wheel base models. These have a cover plate on the back. Mostly rear end.

• ENV are the oddities, they were sometimes to be found on 2a 109" station wagons.
• They were initially fitted to the rear of the S2a Forward Control and later to the front of the same model.
• All S2B Forward Controls have ENV front and rear.
• S2a 1 Ton models have ENV front and rear
• S3 1 Ton models have Salisbury front and rear early but later return to Rover front.

Summary of diff types:-
All* swb Series 1,2,3 had Rover diffs, all diff centres interchangeable although details differed through the years, and except for the very early ones all were 4.7 ratio.

All Series 1,2,2a lwb came as standard with Rover diffs, as above, except the One Ton and 110 FC, which had ENV diffs front and rear, later salisbury, although they may not have come in until S3 in bonneted control One Ton. These were optional on standard 109s, but I have never struck any with ENV or Salisbury front axles and although salisbury rears are common, I do not know of any fitted from new. All were 4.7 ratio.

All Series 3 109s except Stage 1 and One Ton had Rover front and salisbury rear axles with 4.7 ratio. One ton salisbury front and rear, 4.7. Stage 1 Rover front, salisbury rear, 3.54 ratio.

* There was one small batch of Stage 1 88s to a special police order in the West Indies, which I am pretty certain had Rover diffs front and rear, 3.54 ratio.

John

John the photos I have of a couple of the 88 inch Stage 1 s look like they have Rover Diffs.
I think you have issues with an LT95 and a Salisbury Diff in an 88 inch chassis.

Originally Posted by djam1

John the photos I have of a couple of the 88 inch Stage 1 s look like they have Rover Diffs.
I think you have issues with an LT95 and a Salisbury Diff in an 88 inch chassis.

You have issues with the salisbury with ANY gearbox in the 88 chassis - which is why I was pretty certain they had Rover diffs. I know some people have fitted them to 88s, but it is asking for U-joint problems as the angles get too great with spring deflection, particularly in the rebound direction.

John

Originally Posted by JDNSW

Summary of diff types:-
...
All Series 1,2,2a lwb came as standard with Rover diffs, as above, except the One Ton and 110 FC, ...

I was thinking about my Suffix G 109's last night and they were both 1971 models. The stationwagon had a Salisbury rear end and 24 spline drive flanges on the front end, which was standard with the 24 spline rear end Salisbury. In the 4 years between when it was new and when I bought it second hand, it would have been most unlikely that someone retrofitting a Salisbury rear end would go to the trouble of replacing the front end just to get the 24 spline flanges. My opinion is that the Salisbury diff was standard, but whether it was "optioned up" I can't say.

Originally Posted by JDNSW

... except the One Ton and 110 FC, which had ENV diffs front and rear, later salisbury, although they may not have come in until S3 in bonneted control One Ton. These were optional on standard 109s, but I have never struck any with ENV or Salisbury front axles and although salisbury rears are common, I do not know of any fitted from new. All were 4.7 ratio.

There is a bit of debate in 1 ton LR enthusiasts in the UK, about the ENV/Salisbury change over in 1 tons. The books indicate that the change happened at model change over, with a Salisbury front and rears replacing the ENV front and rears although there is at least 1 person who has an SIII 1 ton from one of the UK electricity boards which has ENV diffs. (This may be a specification by the Board to standardise parts.) You need a modified military chassis to get sufficient clearence between the diff and the sump with ENV diffs as well as to allow clearance for the 9.00 16 tyres.

Originally Posted by JDNSW

One ton salisbury front and rear, 4.7. ... John

Series 3 1 Ton models only had Salisbury front ends until the end of 1974 production (August) after that they went back to Rover front ends. Possibly because of the expense of the one piece housing which included the swivel balls, similar to the 101".

C Ya
Diana