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AWD doesn't really apply from a stop it seems
So I'm in the process of getting my snow tires put on. I mounted my fronts and was on the way to get the rears mounted when I got completely trapped on the top of my parking garage.
I was thinking "hey, I at least have my front snows mounted, surely that'll pull me around at least as well as a FWD car or something" not so much. The rears would find some ice and just spin. I had to have my car pushed! It pretty much did this: I did some browsing here and it seems like nothing is broken and that this is normal, but I wanted to be sure. When does it send this mystical 20-40% of the power to the front tires? The answer is clearly not when the car isn't moving. Is it electronically controlled? I'm looking forward to getting the car out in the snow with all 4 tires to see what all the hype is about. |
That's odd. How long have you owned the car? Are you sure it wasn't converted to 2WD? I drive mine in the snow all the time and have never had that happen from a start.
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Originally Posted by Nikolas
(Post 3407461)
That's odd. How long have you owned the car? Are you sure it wasn't converted to 2WD? I drive mine in the snow all the time and have never had that happen from a start.
when the rears slip the fronts should kick in |
I just got it so it is possible. Any quick way to verify I have a front diff. Explain it as you would a child...I'm not mechanical at all.
Buying this car has been quite the learning process! I will say that since I live in denver I would be shocked if the previous owner converted it because it wa daily driven |
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Originally Posted by TiALSport
(Post 3407466)
+1 looks like it was converted
when the rears slip the fronts should kick in Anyone selling a spare front diff in the meantime |
No front diff. +1.
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no front diff +3
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Haha. Ok. Well that isn't my car...it was more of an example. I couldn't pull myself out of an icy hole though.
I'll get it up on a lift and snap some pics to verify |
Originally Posted by Ajs76
(Post 3407472)
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see i watched a bunch of videos and it never looks like the front adds a lot in the 996. I could be wrong and might have to go back to the dealer and yell. Anyone selling a spare front diff in the meantime but i think it's what....up to 30% front transfer max? |
the car in the video you posted is RWD for sure. i was under the impression that was your car.
what kind of snow tires did you go with ? that video is making me nervous... i'm rwd. |
perhaps it is normal
The viscous coupling is just as it sounds. It uses fluid to transfer power to the front. Kind of like a torque converter. The only difference is that the fluid would thicken as temperature increases when there is slipping between the two turbines. In cold weather, this almost doesn't thicken. 5% of the torque is only about 15 ft lbs at peak. Even at the full 40%, your talking 100 ft lbs. What kind of tires are you using? That plays a much bigger part than any electronic nanny or awesome drive train you have. If you don't have snow tires on, your not going anywhere. Subaru AWD uses a transfer case. Very much like a normal differential. It's actually very backwards like a truck. With that said, it's a lot more "useful" in getting you going in the snow. WRX and EVO just added clutch packs to the diffs and use electronics to control the engagement. The 4WD in the P-cars are not designed for this purpose. It's to assist in cornering. That's why they drive like a RWD car. The 997 C4S is actually quicker around the track than a CS. They do share the same AWD system with the 996. The 997 turbos does change this to a system similar to the WRX and EVO which allows the engineers to control things electronically. There is nothing wrong with your system. Get some good snow tires. Narrower the better. You'll be able to get around. |
Yeah, I was reading this thread too:
https://www.6speedonline.com/forums/...ferential.html If I take a picture of the underside, is there anything you guys can tell me? It looks pretty sealed up though (i.e- no exposed stuff like my M3). I'm getting the winter tires put on now so it's a great photo op :) |
is there a drive shaft at the front ? look by the tranny, you should be able to see if the drive shaft is connected to the output shaft...
(i think thats what the're called) what kind of snow tires did you go with ? also, what sizes ? |
Originally Posted by STEVE KOJASEVIC
(Post 3407493)
the car in the video you posted is RWD for sure. i was under the impression that was your car.
what kind of snow tires did you go with ? that video is making me nervous... i'm rwd. I'm going to chance fate and find that same ice hole with the new winters on the rear and see how it handles the problem. It'll be Blizzak LM60's. Look at that other thread I posted - if no one told me, I would have thought th vids posted there were of RWD cars as well. |
2 Attachment(s)
Alright, so here's some pics I just snapped from the rear. They might be too bad to actually see anything.
It looks like some kind of shaft is going towards the front of the car. |
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