[200q20v] Re, Synthetic Trany oil

[Kneale Brownson]

I think there are differences in GL4 and GL5 that are there because of 
differing applications rather than because of one being a better lubricant 
than the other.  I believe one is best used in the tranny and the other in 
the diffs.  I don't think either should be used in both locations, if my 
memory of postings regarding this issue is correct.  I just don't know 
which is which and why (although I think it has something to do with 
protecting the syncros in the tranny).


At 01:21 PM 12/08/2000 -0500, PeterBergin at aol.com wrote:

>I recently bought Castor Synthetic GL5 for my 200 from Jim Blau, and was told
>that it meets or succeeds all GL4 specs.  I have also been told this from
>another source.  I would like to confirm this before I change all tranny and
>diff  fluids soon.  Any one know for sure?  I was also told that GL5 is a
>newer fluid that may not have been in use at the time of our cars 
>manufacture.
>
>Thanks for your considerations and thoughts.
>
>Pete
>91 Avant
>86 Avant (for sale)