overfilling MT oil?
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overfilling MT oil?
on certain transmissions it is common practice to overfill the oil slightly. does anyone do this on their 5mt and by how much? how many quarts exactly? I cant think of any real negative effects of this, but I could be wrong. comments?
1994 Touring Wagon: ruby mica, 5mt swapped
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vrg3
- Vikash
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I would imagine that if you overfill the transmission enough you could get oil frothing, which would reduce the oil's ability to form a film between parts, resulting in potentially damaging metal-to-metal contact.
Why not just fill it to the correct level?
Why not just fill it to the correct level?
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
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entirelyturbo
- quasi-mod-o
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That's what I would think, and it's no picnic replacing seals on Subaru MT's...0perose wrote:seems like this would put extra stress on seals and stuff
1993 Citroën XM Turbo C.T.
1993 Ford Spectron XL-T
1991 Fiat Croma 2.0T i.e.
Another car, soon to be announced
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"Der Wahnsinn ist nur eine schmale Brücke/die Ufer sind Vernunft und Trieb"
1993 Ford Spectron XL-T
1991 Fiat Croma 2.0T i.e.
Another car, soon to be announced
Find me on Facebook, Instagram, X, and TikTok
"Der Wahnsinn ist nur eine schmale Brücke/die Ufer sind Vernunft und Trieb"
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vrg3
- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
206er - Hmm, so you're wondering about the possibility that FHI engineers decided to make the specified capacity lower than would be ideal for lubrication. The only reason I could imagine for anyone doing that would be that maybe less oil would mean less drag as the gears spin through the oil.
I doubt that's the case, though. For one, it seems like the reduced lubrication would cause more friction anyway. And for another, I would just have a hard time believing that FHI would have done something like that to us.
I doubt that's the case, though. For one, it seems like the reduced lubrication would cause more friction anyway. And for another, I would just have a hard time believing that FHI would have done something like that to us.
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
^^^ Agreed. Any engineer that would decide to have added friction over a slight loss of power in the driveline for a market car is an idiot. Perhaps somewhere out there are old transmissions that do better between two particular gears when they have more than specified oil but it's certainly not ours 
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.Lee
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
turns out the guy I heard it from was referring to a SM-465 which Im sure is not designed as well as a 5mt. I'll just be filling up to the correct amount with good ol dino oil then if I decide I need to I'll switch to something like redline or royal purple.
1994 Touring Wagon: ruby mica, 5mt swapped