I wouldn't view synthetic oils as not backward compatible.  This was
the case 10 years ago but is not true now if you ask most people who
study synthetics closely.  Put Redline MT-90 in there and don't run
anything else.  I put it in my tranny and it now shifts much smoother.

On Mon, Mar 16, 2009 at 8:05 PM, Tom Hargrave <thargrav@hiwaay.net> wrote:
> If the rebuilder knows what he is doing he will replace all the wear parts &
> any worn out hard parts & will bring all of the tolerances back to spec with
> the right shims. You should not need to do anything but pay him.
>
> Thanks,
> Tom Hargrave
> www.kegkits.com
> 256-656-1924
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
> AD Felder
> Sent: Monday, March 16, 2009 9:51 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: transmission rebuild
>
> ok, at the risk of starting a fistfight, I am having my 4-speed 091
> transaxle rebuilt.� Any opinions on lubricant for this?� I am not big on
> synthetics because they are not "backward compatible".
>
> This transaxle would not go into or stay in first gear.� second gear holds
> great but getting there is sometimes a little "iffy".� no other known
> problems, but what should I think about having done while the case is open
> that a rebuilder may not neccessarily do without asking?� Is replacing 4th
> gear still an issue (popping out when worn)?� special synch rings?� anything
> special?
>
>
>
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