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steuspeed |
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#1
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,008 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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earossi |
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#2
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Member ![]() ![]() Group: Members Posts: 210 Joined: 8-December 11 From: Chicago, Il Member No.: 13,878 Region Association: Upper MidWest ![]() |
I agree with Casto. I have a 993 and have found that using a trans oil with friction moifiers in it does not work well with Porsche synchros. Many 993 folks have found that an oil like Redline 75W90 N.S. which is a synthetic that does not contain any friction modifiers works best. Many transmission guys working on Porsches will guide you away from Swepco for that reason. So, suggest that you look for an oil without any friction modifiers in the formula.
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J P Stein |
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#3
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Irrelevant old fart ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None ![]() |
I agree with Casto. I have a 993 and have found that using a trans oil with friction moifiers in it does not work well with Porsche synchros. Many 993 folks have found that an oil like Redline 75W90 N.S. which is a synthetic that does not contain any friction modifiers works best. Many transmission guys working on Porsches will guide you away from Swepco for that reason. So, suggest that you look for an oil without any friction modifiers in the formula. You haven't got "Porsche snycros" in your 993. |
Richard Casto |
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#4
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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 ![]() |
I agree with Casto. I have a 993 and have found that using a trans oil with friction moifiers in it does not work well with Porsche synchros. Many 993 folks have found that an oil like Redline 75W90 N.S. which is a synthetic that does not contain any friction modifiers works best. Many transmission guys working on Porsches will guide you away from Swepco for that reason. So, suggest that you look for an oil without any friction modifiers in the formula. You haven't got "Porsche snycros" in your 993. I think that is a good point to note. While this is 914world and we generally talk about the 901 series transmissions (such as in the 914 and older 911s), it should be noted that I think the 901, 915 and 930 were the last of the Porsche transmissions to use the classic "Porsche" synchro design. Later transmissions such as the G50 and beyond (actually pretty much any new manual transmission these days regardless of manufacture) uses the newer and simpler "Borg Warner" design. Part of this is also why people should not expect older Porsche transmission to shift like those in their econobox Honda or Toyota! In generally those who are new to older cars have been spoiled by modern transmission design. Not that you can't get a 901/915 to shift nicely, you can, but it will never be as nice as newer designs. Anyhow, I digress... So.... shift quality characteristics are a combo of a specific transmission fluid AND the design of the transmission AND your personal driving/shifting style (I.e. try to speed shift and you will have more problems and do more damage). So a given fluid may work well in your 914, but not in your later/newer 911, or vise versa. Richard |
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