Vehicle & Technical > Defender

Metric v Imperial diffs

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bigfatsi:
I'm about to replace the knackered diff from my 90 with one I have bought out of a RRC. Now I thought they would be a direct swap but when I was reading and ad on eblag, they claimed there are different carrier bearings (whatever the hell they are) I can see that the oil filler is on the side on the RR one but thought nothing of it. Am I stuffed here or will they swap?  :evil:  Not happy.

Simon.

jjsaul:
if the filler plug is in the diff casing then its imperial, if its in the axle casing oinly its metric....

and apparently they arent interchangeable unless you swap halfshafts etc as well (anyone feel free to correct / back up what im saying cos im not 100%)

Xtremeteam:
imperial & metric are both 10 spline so it will fit in the hole,the problem arises IIRC if you fit a metric diff into a imperial casing as then u have no way of filling with oil :wink: the imperial one should go straight into your truck with no probs

bigfatsi:
Well it's in and it drives. Looking good so far!

Simon.

rollazuki:
Diff carrier bearings are a different size. Ive got a few spare diffs with both sizes of bearings, and the older ones are of a smaller size. No idea what the size is, but they are different. However they are both interchangeable as a unit, an older 10 spline diff will fit into a newer axle, but the bearings in the carrier clearly arent interchangeable.

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