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Old 09-25-2013, 11:42 PM   #1
dhoff024
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Transmission Fluid Question

I know that this has been answered on here before and other places but I just figured that I would ask and see peoples opinions. I was looking today just out of curiosity what kind of transmission fluid my focus took. I have an 09 focus ses 5 speed manual. From what I see everywhere people say to get the motorcraft gear oil that it is the best to use in these transmissions but I was just wondering what people think of using amsoil synthetic gear oil? They have full synthetic 75w-90 and also 5w-30 syncromesh manual tranny fluid. I like there products and use there oil in my focus just wanted to see if anyone has tried there stuff for the transmission or if motorcraft is the only way to go for the tranny?


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Old 09-25-2013, 11:46 PM   #2
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This topic as been beat to death, use what you want to use, majority of most fluids will work just fine.
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Old 09-26-2013, 12:35 AM   #3
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I figured as much but just wanted to check if it truely was a big deal and really made a huge difference to have the original type of fluid. But that answers my question I just didn't want to cause an issue if I put the amsoil in it instead of regular
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Old 09-26-2013, 12:37 AM   #4
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Na, you'll be fine, folks on here have used a verity of fluids, no one as had a failure from the wrong fluid being used that I've ever seen on here.
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Old 09-26-2013, 04:58 AM   #5
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Agree with the posts so far. I would only add that one actual difference is ease of shifting in cold (Winter) weather. If you live in the South/Southwest.. no problem. If you live in a climate which can get below freezing.. Then the type if transmission fluid matter for ease of shifting when the transmission is cold.
Some perfectly OK fluids SUCK bigtime in a really cold transmission. Not for lubrication. but for shifting ease.
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Old 09-26-2013, 12:04 PM   #6
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Thanks for the replies and sorry for posting something something that has been talked about a lot I live in Pittsburgh pa so the cold is a factor I don't need to change it now but was just looking ahead to when I do. So if I go with amsoil fluid they sell a 75w-90 manual transmission fluid or a 5w-30 synchromesh manual transmission fluid what would you think would be better for all year round? II'm leaning towards the synchromesh seems to me it might be the better option between the 2.
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Old 09-26-2013, 03:11 PM   #7
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I've used Redline MT90 in several cars over the years and loved the results. That's what the ST will be getting when I get around to changing it.
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Old 09-26-2013, 08:42 PM   #8
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Quote:
Originally Posted by cbdallas View Post
I've used Redline MT90 in several cars over the years and loved the results. That's what the ST will be getting when I get around to changing it.
I have used redline fluid in a few vw's that I own and I do like the it I have never had a complaint with it and I may go that route. The only reason I asked about the amsoil is I have been using there motor oil in my vehicles for a while now and figured I would give the transmission fluid a try and didn't know if anyone has used it or had a preference between the 2 different manual tranny fluids they sell.
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Old 10-17-2013, 05:07 AM   #9
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Recently had my transmission open to replace clutch, pressure plate, etc. I put gear oil in mine.
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Old 10-17-2013, 01:03 PM   #10
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It's been pointed out in other posts that some gear oil will dissolve the brass synchros. Before I knew any better I used some Mobile 1 gear oil in my Wrangler transmission and by the time the tranny failed, the gear oil looked like brass soup.
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