MT-90 is generally out of favor these days for vanagon transaxles,
and I gather they even changed the formula a while ago.

What I like lately is theGL-5 that German Transoxle pretty much insists
on for their rebuilt transaxles.
Ultra-Guard Fully Synthetic 75W90, a GL-5 with properties that
syncronizers like also.

generally ..I consider GL-5's to be better for the gears,
and GL-4 to help with shifting .
Sometimes I even use some Redline GL-4 as an addtive to help shifting.

The shift/syncronizeraction and feel in the 2WD transaxle I got going
recently, with Ultra-Guard in it..
the first 15shifts , especially into 2nd several times where a
little'draggy' .....then got better immediately ..like in 6 miles of
driving and shifting.
I think it's good stuff. I'llprobably use it only for a whileand see how
that goes.
Scott
www.turbovans.com

On 3/30/2013 5:26 AM, Dennis Haynes wrote:
> I myself prefer using a GL-5 oil to better protect the ring and Pinion
> gears. This is the expensive part. I have yet to  see any sign of Syncros
> corroding especially with any of the synthetics. The shifting will work just
> fine even with the improved EP characteristics of the GL-5.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> JRodgers
> Sent: Saturday, March 30, 2013 2:48 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Tranny Fluid - Manual Transmission
>
> On my 88GL I need to service the transaxle and swap out the tranny fluid. I
> have been running Redline MT 90 for a long time now, and wonder if it is
> still the best or a very good choice. It sure made shifting easier when I
> made the switch. Is it still good enough??
>
> thanks
>
> John
>