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Birdie205

New Member

• Sep 29, 2021

• #1

Hi, Ive just aquired a series 3 and would like to just check the oil levels before using it.
The rear diff has the fill plug in the diff casing and not in the backplate, should I fill the diff to this plug using it as a level or should the level be a certain distance down from the plug.

Thanks in advance.

 

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Colthebrummie

Well-Known Member

• Sep 29, 2021

• #2

Yes use the fill plug as the level. Have plenty of rag handy to catch the inevitable spill.

Col

 

tottot

Well-Known Member

• Sep 29, 2021

• #3

That axle diff will have come from a series 2a or perhaps an early 3

 

Blackburn

Well-Known Member

• Sep 29, 2021

• #4

I usually fill to the bottom of threads in the hole then refit the plug my Series 3 has filler plug in that location front and back even though front has a filler on axle case also.

 

LordOWar

Well-Known Member

• Sep 29, 2021

• #5

Blackburn said:

I usually fill to the bottom of threads in the hole then refit the plug my Series 3 has filler plug in that location front and back even though front has a filler on axle case also.

Click to expand...

Mine is like that as well.

 

cornish rattler

Well-Known Member

• Sep 30, 2021

• #6

Wish my rear axle was as simple as that, as its a Def 3.54 diff on a 2a rear axle so no filler plug so as i can't check the level i just drain it off, pull an half shaft out, jack one side up and put in the right amount of oil and re-fit half shaft