Thread: 3.54:1 Range Rover diffs into S2A?

if you need to ask then I suggest you don't even contemplate a RRC / D1 Axle swap into a Series .
You need to cut away / grind off all the brackets from RRC housings , manufacture / weld on appropriate spring perches. You need to allow sufficient room on the front so that the track rod does not rub on the leaf springs, which means higher front spring perches ( lowers the vehicle) . Must maintain RRC pinion upward angle to keep caster angle correct , then you need to cut a big hole in bottom of right engine mount so prop shaft does not hit it. need to convert to power boosted dual circuit brakes . nope not a bolt in conversion.


10 spline 3.54 RRC diff centres are a bolt in swap into the Series housings. .

Originally Posted by goingbush

if you need to ask then I suggest you don't even contemplate a RRC / D1 Axle swap into a Series .
You need to cut away / grind off all the brackets from RRC housings , manufacture / weld on appropriate spring perches. You need to allow sufficient room on the front so that the track rod does not rub on the leaf springs, which means higher front spring perches ( lowers the vehicle) . Must maintain RRC pinion upward angle to keep caster angle correct , then you need to cut a big hole in bottom of right engine mount so prop shaft does not hit it. need to convert to power boosted dual circuit brakes . nope not a bolt in conversion.


10 spline 3.54 RRC diff centres are a bolt in swap into the Series housings. .

Thanks for the detailed information. I did need to ask, as I've not done this before. As to contemplating the job, or not, I am capable of many things, but time poor, so the diff centre swap will be the path I go down.

The stage 1 diffs are leaf sprung and 3.54, so that could be a straight swap. The down side is that there are not many around " spare " at a reasonable price. Would give you the large front brakes as well.

Just be careful to get diffs with the same filler arrangement as the s2.

Some RRC diffs have a filler on the nose and some no filler plug as it is on the rear.
Regards PhilipA

Originally Posted by pop058

The stage 1 diffs are leaf sprung and 3.54, so that could be a straight swap. The down side is that there are not many around " spare " at a reasonable price. Would give you the large front brakes as well.

hi pop i have stage one diffs here need to take the whole stage one and use the parts jiim

Originally Posted by russellrovers

hi pop i have stage one diffs here need to take the whole stage one and use the parts jiim

PM me a figure please Jim.

Originally Posted by pop058

The stage 1 diffs are leaf sprung and 3.54, so that could be a straight swap. The down side is that there are not many around " spare " at a reasonable price. Would give you the large front brakes as well.

The problem with this solution is that in an 88 the rear diff is a Salisbury one, which would have to be installed as a complete axle assembly. Not only are the spring mounts in a different place from those on the 88, but the diff nose is much longer, resulting in a very short non-standard rear prop shaft and potentially universal angle problems.

Originally Posted by PhilipA

Just be careful to get diffs with the same filler arrangement as the s2.

Some RRC diffs have a filler on the nose and some no filler plug as it is on the rear.
Regards PhilipA

Ahh yes, I had to add a Fill port on the Metric Disco diff housing I installed in the back of my Lightweight.