Yes it is a fill level indicator, it is easier to drain it using a pump and
a small bore tube than to take off the rear cover on a Spit (you need the
diff on the bench first!) I bought a thing that looks like a big syringe
made from a greasegun body with about a 1/2" o/d plastic tube on the end.
After draining clean it out and use it to refill the diff, easier than the
squeezy bottle!
Graham.
2500PI MKII
Sprinted Dolomite
2000 MKI
Toledo
1300 Front Wheel Drive
http://members.tripod.co.uk/TriumphIW/index.html
>
> Rear end takes 1 Imperial pint / 1.2 US pints of SAE90 Hypoid Gear Oil.
>
> That is a fill plug; drain by removing the cover. I believe that you can
> also use it as a "fill indicator" (on level ground, pump in gear oil until
> it comes back out; then it's full) but you should confirm this elsewhere
to
> be certain.
>
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