Dillon, Meade LCDR wrote:
Dieselvolk,
Anyone know if this technique of flushing is approved for our cars?
NO, it's NOT approved and is unwise UNLESS you want to try it before
replacing a transmission that is failing (it MIGHT flush out something
that's causing a problem, but that's unlikely). But the Mercedes
transmission is designed so that the crud does usually end up in the pan
and the filter catches it before it's recirculated back thru the
transmission. The primary purpose of the flush devices was to allow a
complete fluid change (both sump and torque converter) in transmissions
that were NOT designed for complete oil removal. I've read the
promotional and sales pitches as well as "white papers" on the
methodology from several sources. It is a satisfactory technique for
most older American cars (I have seen no papers less than 10 years old)
but may not be worth the added cost over conventional routine regular
transmission service. At least one study purported to show that on some
transmissions, the flush service was INFERIOR.
Mercedes included a torque converter drain. The flush was designed so
the pan didn't need to come off - the device was hooked up, the flush
performed and the device disconnected. Very quick and a money maker for
the shop - UNLESS they also needed to remove the pan afterward to change
the filter (which would be necessary in a Mercedes transmission) and
then refill the transmission - most shops would do that.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84
190D 2.2 229Kmi (retired)
