rear differential drain plug

Bernie Benz b.benz at
Wed Jun 30 11:18:06 EDT 2004

So, DFI if IAB!

> From: gschesel at
> Date: Wed, 30 Jun 2004 15:11:22 +0000
> To: 200q20v at (audifans)
> Subject: rear differential drain plug
> Subject Audi is my '91 100, with 199k miles.  My new neighborhood (non dealer)
> Audi mechanic was to drain and refill the fluids in the manual tranny and the
> rear differential with synthetics.  No problem with the tranny, but the drain
> plug on the diff would not budge, and at some earlier time was screwed in till
> it was flush with the housing.  So all he was willing to do was check the
> level and advise.  The level was OK.  I assume I will have to tackle this
> myself.
> Would it be wise to drill a pilot hole in the plug and turn it out with an
> eazy-out?  Any metal shavings would hopefully be drained out along with the
> fluid when it drains.  My guess is that the amount of torque needed to get the
> plug to turn loose will mean drilling a rather large pilot hole and use of a
> rather large eazy-out.  Or, should I leave it alone, suction the fluid out and
> then refill to correct level?
> Any suggestions?
> thanks
> gordy
> '91 200 20v
> '91 100 quattro
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