[200q20v] Trans and Diff oils
Tom and Carlyn Jervis
jervidae at cybermesa.com
Thu Nov 16 05:56:18 EST 2000
This is not something to be done casually. First of all, those plugs
are very tight, and unless the wrench has the right tools, problems
can occur. You really need a 17 mm allen to put on a hefty breaker
Second, and VERY important. GL-4 and GL-5 (and GL-6) oils are very
different. Do not let anyone tell you otherwise.
Differences have to do with corrosion protection of copper (bronze
synchronizers), anti-foaming, thermal and oxididation stability, and
the relative important of high-torque, low speed, or high speed shock
loading. The tests are technical in nature and not easily described
(and I don't understand them). Part of the difference has to do with
hypoid gears that have a very high torque loading.
It is true that GL-5 has more as well as different requirements than
GL-4, but the numbers do not indicate anything other than the set of
tests. GL-6, for example, has no requirements for high-torque
applications, while 4 and 5 do.
I have used Redline for the last 60,000 miles with no problems. You
can buy direct from them (800 #) and they know the amount and
appropriate type for trans and diff for the 200-20V. Audi uses
synthetics and if you live anywhere cold, you should too.
In the way and far-off times I had an Alfa-Romeo. Tranny ran low on
a long trip right after I bought it and I refilled with (naturally)
transmission oil at a convenient garage. Shortly thereafter I had to
replace all the (steel) synchronizers. Should have used straight
Once, after deciding that my urquattro would be better with winter
dino oil in the trans, I had to be pull started at 20 below. After I
let the clutch out, the truck pulled the car along a snow covered
street for about 50 yards before the wheels started TURNING!
Synthetics are excellent at low temps.
Lesson: Read the directions.
Los Alamos, NM
More information about the 200q20v