E30 325i diff query...

[Mucker_325i]

Just a quick one, I've resorted to the zone because I can't find the info on the net. Anyway I've got a 318i touring with a 2.5 sport motor in it. The diff is still stupidly the 1.8 diff but I'm wanting to put a standard 2.5 diff in it. I have sourced one but want to bolt the new one in and change the oil in it.

All I'm looking for is if anybody could recommend wat diff oil I need and also how much I'm going to need? Is there a sightglass or do I fill it up until it's full, I'm not sure.

Any replies are much appreciated, matt

[trevski]

Think you fill until oil comes out of the hole you are filling from! Nice man in halfrauds willshow you the recomended oil you require..

[Brianmoooore]

Just a quick one, I've resorted to the zone because I can't find the info on the net.

????? As far as the E30 is concerned, we ARE the net!
Oil you require is SAE 80 to API-GL4.
You will need 0.9 litres or 1.7 litres, depending on whether you have a small or medium diff., and you fill it to the bottom of the filler hole, with the car level.

[Mucker_325i]

Much appreciated. Matt

[ijahn2000]

Just as a note, if it is a LSD diff, make sure you use mineral oil.

Synthetic oil screws up the friction plates.

[Cook318IS]

Just as a note, if it is a LSD diff, make sure you use mineral oil.

Synthetic oil screws up the friction plates.

If its an lsd its a complete different grade of oil too! If its an LSD you would want something like castrol SAF-XJ 75w-140

[KimH]

Small but important tip: make sure you can undo the top filler plug before you undo the lower drain plug. It's a sod of a job if the filler plug cannot be undone once your diff is drained!