Vehicle & Technical > Defender

Metric v Imperial diffs

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bigfatsi:
Someone has sown the seed of doubt that the diff I've put in my 90 is wrong. They said that they are different ratios and can't be interchanged. I'm only wondering as when on wet grass or mud it feels like the back of the car is trying to make it go like a crab. On the slightest gradient the back will slide as if it's trying to swap with the front. There is nothing untoward on the road. Now could this just be because the rear has less tread (swapped from fronts) or could it be the diff. Anyone ever heard of anything liek this before?

Simon.

Xtremeteam:
if its out a RRC then it should be the same ratio as all coil sprung motors had a 3.54 diff as standard,as it stands i fitted a brand new imperial diff to a 90 today & its going fine

graham2306:
I had no oil filler on my series III after putting a front diff in the rear axle.  Was easy enough to jack it up on one side, pop out a half shaft and fill it from there.

Not sure that modern axles are as easy to pop shafts out of and it certainly aint that easy if you are talking about a front diff.

Graham

Xtremeteam:
all the coilsprung motors had a filler plug of some sorts in the axles appart from the early rangies,so fitting an early diff into a later motor isnt a problem,fitting a late diff into an early motor is but thats no the issue here

bullfrog:
I would imagine you could undo a breather and fill via that if really stuck ! :wink:

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