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Old 02-17-2004, 12:20 PM   #1
Asinine
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Have a Nice Day? basic automotive question... (don't flame the noob)

What is the difference between manual trasmission oil and manual transmission fluid? I though they were the same thing, but something I just read indicates differently.
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Old 02-17-2004, 12:41 PM   #2
brunetmj
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There one in the same in a manual. For an automatic transmission the word fluid is more often used.
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Old 02-17-2004, 12:45 PM   #3
Asinine
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Ok, so if I want to put the best stuff I can in my 5-speed WRX, what would you recommend?

It's reaching the end of its break-in period, and I plan to short change the oil with high end synthetic, and replace the tranmission oil with something that will make shifting a cold transmission nicer.
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Old 02-17-2004, 02:49 PM   #4
whitenoise77
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In the MR2 communiy, almost everyone there will say GM sycromesh is the best stuff for there tranny. I havent tried it myself, but people say it makes shifting alot smoother.
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Old 02-17-2004, 03:18 PM   #5
Stanley
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Quote:
Originally posted by Asinine
Ok, so if I want to put the best stuff I can in my 5-speed WRX, what would you recommend?

It's reaching the end of its break-in period, and I plan to short change the oil with high end synthetic, and replace the tranmission oil with something that will make shifting a cold transmission nicer.
Not flaming (per your request), but this is a raging debate. There are many that claim using synthetic causes syncro problems, but I know from personal experience that Redline 75-90NS in my gear box makes it shift smoother when cold. I've read a lot of good reviews on NEO gear oil...I've read a lot of reviews on plain old Valvoline gear oil.
If you're serious about switching the tranny oil in your new car, I'd recommend dedicating at *least* 4-5 hours of research time on this site, www.bobistheoilguy.com, and I-Club.

FWIW, my transmission seemed to "loosen" up a lot over the first 10-12K miles.
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Old 02-17-2004, 03:53 PM   #6
Asinine
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I found this info on the net and it made me go hmmm...
Quote:
Second, most engine and lubricant manufacturers recommend that synthetic
oil not be used during the "break-in" period of an engine. The reason
for this is that synthetics, possessing extraordinary lubricity and
lubricant film strength, do not permit the metal wear necessary for the
seating of piston rings. A change to synthetic motor oil should wait
until you new or rebuilt engine has completed the break-in period of six
to eight thousand miles.
Good thing to know...

Now I need info about the tranny oil.
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Old 02-17-2004, 04:04 PM   #7
Psydotek
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Quote:
Originally posted by Stanley
...but this is a raging debate...
So true. Make sure to read all the goods and bads you come across. I've got NEO Synthetic HD (NOT the RHD) and it's working just fine for me. It was the RHD [Racing Heavy Duty] that i heard was possibly eating synchros. [Not Flaming Here...] Just remember, having the "best" fluid/oil won't make up for a poor/unsymphathetic shifting technique.
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Old 02-17-2004, 04:08 PM   #8
Asinine
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Hehe thanks. If anything I'm a very gentle shifter. I still want an easier drop into gear though--especially when cold.
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Old 02-18-2004, 12:04 AM   #9
Mike Wevrick
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Try double-clutching all your shifts until the tranny warms up a bit. It sound like a pain I know, but since you can't shift fast in the cold anyway it works pretty well when you get used to it.
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Old 02-18-2004, 12:30 AM   #10
electricpork
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I switched to Mobil 1 70w-90 at 1500, and it made the synchros much happier in the cold.

Ben
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