Results from changing my tranny oil to SWEPCO 201, Comments on transmission oil. |
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Results from changing my tranny oil to SWEPCO 201, Comments on transmission oil. |
steuspeed |
Dec 18 2011, 07:20 PM
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#1
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Senior Member Group: Members Posts: 1,006 Joined: 12-July 11 From: Portland, Oregon Member No.: 13,308 Region Association: Pacific Northwest |
So I have had my car about 6 months now. It has 105k on the clock. No record of when the last time the transmission oil was changed. First and second gear syncros are toast, but if I am real careful I can get it to slip in without grinding. Got to put it in first just before you come to a stop. I just changed the oil (Brad Penn) and thought it would be a good time to try some SWEPCO 201 in the transmission. The oil that drained out looked pretty good. Still had an amber color to it but a little on the low side. So now with the SWEPCO 3rd has a real notchy feel to it. second will zip on the teeth as I come down from third with my usual methods. First is even more finicky than before. Outside Temp is 35-45 degree range right now. Will this get better over time? Seems like I went backwards. (IMG:style_emoticons/default/sad.gif) Any comments welcome.
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Richard Casto |
Dec 19 2011, 09:07 AM
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#2
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Blue Sky Motorsports, LLC Group: Members Posts: 1,465 Joined: 2-August 05 From: Durham, NC Member No.: 4,523 Region Association: South East States |
Just to add to something else to read, I wrote this article on transmission lubricants awhile back...
http://www.blueskymotorsports.com/index.ph...16&Itemid=6 Every oil has their "secret sauce" with respect to additives. One of those additives you will find in transmission/gear oil are "friction modifiers". So it could be that the Swepco is more "slick" than what you were using previously. So this means that your already questionably syncro rings and associated hubs and sliders are not working as well as they did with the other oil. The design of the synchro system in this transmission relies upon friction to work properly. The friction allows the dog teeth on the slider and synchro hub to "grip" the synchro ring. When this works correctly, the friction allows them to match speed and engage with out drama. If they don't match speed, then you get a clash of the dog teeth which causes the grinding noise. In general I follow the general conventional wisdom of a number of people here and that is to use the cheapest oil "that works for you". To echo what has been said above, mainstream GL-5 dino oil has worked fine for decades. More expensive "boutique" oils may or may not work for you and they will NOT give you any extra value (due to their extra cost) if less expensive oils work just as well in your transmission. My car is currently in pieces in my garage, but if it was running, what would I use in my 901/914? It probably would be Valvoline HP 80W90 GL-5. It is GL-5, it is the right viscosity, it is not a generic house brand, it is dino oil, it not synthetic, it has EP additives, its not particular expensive, and it is readily available at FLAPS near me. Other mainstream brands that fit this criteria would also probably be just as good or better. Anyhow kudos for at least changing your transmission oil! (IMG:style_emoticons/default/first.gif) Richard |
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