Date: Wed, 6 Nov 2002 13:03:45 -0600 From: "Walt Kienzle" <wkienzlenopsam.com> Subject: Re: Tranny fluid, again
I am in nearly the same situation; a new 5 speed transmission from Eriksson arrived last week for my 1991 9000T. It didn't come with any information about the recommended fluid to use, so I was just planning to use 10W-30 dino oil. That is what was in the original transmission, and it lasted for 130K miles (quite respectable, I believe). And even at that, it seems that the failure was a broken shift fork, jamming the gears, and not in any bearing. So better lubrication probably wouldn't have made this transmission last longer. I have also heard that Mr. Mason recommends Amsoil Series 2000 20W-50 for the transmission, and have found that interesting because all reference books I have, including the owners manual, state IN BOLD TYPE that synthetic motor oil is not to be used in the transmission and nothing heavier than 10W-40 should be used. I believe that Townsend Imports is in North Carolina where it stays warmer than it gets in Chicago where I live. Maybe the thicker oil works fine there, but I would be concerned about being able to move the shift lever on those -20F days we occasionally get here (ask me how I know that this might happen ;-). My plan is to stick with the dino oil because it meets the requirements, is readily available, has proven itself to me, and will only cost me about $2 instead of about $30. Any comments? Walt Kienzle "Lance Morgan" <alancemornopsamo.com> wrote in message news:2a52f3e9.0211060924.601b38b5nopsaming.google.com... > This topic has been beat around pretty good, but I wanted to revisit > it, as I'm getting into a 5 spd 86 900T next week. > > It's seems to be general consensus that the pre-89 pinion gear (or > actually the pinion gear housing?) might be the first thing to go in > the tranny (well, something's got to go!) > > The manual recommends dino 10W-30 or 10W-40. In recent years, Saab > has apparently switched to syn? I'm not sure if their recommendations > have changed for c900s? It's unclear if the tranny gear cuts have > changed? > > Eriksson Industries recommends 10W-30 (think it's dino, but not sure - > may be syn) > > Anyway, I don't quite understand how the lubrication needs of a > transmission can be similar to that of an engine (and have felt the > dramatic improvements of using Redline MTL in by 85 VW GTI), altho > it's somewhat explained at the bottom-most URL > > I don't have the other URLs handy, but IIRC, Townsend has torn down > trannies (don't know how controlled this was), and Amsoil 20W-50 came > in first for least wear, with Mobil 1 second - both apparently showing > significantly less wear than dino > > I don't quite understand why 20W-50 viscosity was used, vs something > lighter. > > This also caught my interest, from an apparently very knowledgeable > Saab mech > > http://groups.google.com/groups?q=amsoil+author:ymason%40bellsouth.net&hl=en &lr=&ie=UTF-8&scoring=r&selm=34CA85E6.E89ECB7C%40bellsouth.net&rnum=1 > > Any comments/thoughts appreciated > > Lance
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