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Discussion Starter #1
Hey guys, today was the second time I drove the coupe in any real rain and I feel the rear is slipping constantly when driving on the highway at the speed limit when it's wet out. I slow down 10MPH below the limit to 55 but the slipping just keeps going until maybe about 45ish. Is this normal for RWD? I asked the dealer about it during maintenance, but I was told that was suppose to be normal.. My first car had no problems in the rain however, given that it was FWD I guess I can't really compare. This is my first RWD and I know it obviously takes more caution than FWD, but this doesn't seem right. So again, is this suppose to be typical? for the coupe at least?
 

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I've never had a problem driving at similar speeds. I've driven in HEAVY downpour with NO tcs or abs (because they took a dump on me, not by choice ;)) and it drove fine
 

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aggressive maneuvers are a no-no.

to be honest, I haven't had such issues. If the speed/amount of water on the road, is enough to hydroplane on, then slow down.
 

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I live in South Florida and have had no such issues. In fact, I find even with the track's Summer tires, this car handles just as good if not better that any car I have driven in the rain.
 

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No problems in the rain with my GC, drives like on rails... have you checked your tire pressure and alignment?
 

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Eh Hee
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Again, no issues in the rain. Handles better in the rain than the many cars I've driven with the exception of my brother's old 540i. The Hankooks do better than the Bridgestones IMO. How's the tread looking on the tires?
 

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The stock RE092A all seasons tires are fine in the rain. Went on highway at speed limit, no problems. City at speed limit, no problems as well. Once I changed to extreme performance summer tires, Ecsta XS, wet traction is extremely terrible.
 

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In absolutely pouring rain, I also feel that the car, on stock tires, loves to hydroplane.

Please, do yourself, and all of us, a favor and leave your traction control on in the rain. :p
 

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Dammit, I was going to say "in before TCS police" but I was a little too late...

Seriously, if it's that bad either you roads are terrible or there's something wrong with your car. I have driven in everything from icy mix to torrential downpour and haven't noticed any unusual behavior. I certainly drive a little more carefully but at 75 mph in the pouring rain I felt safe. Stock track model with stock summer tires (cringestones).
 

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In absolutely pouring rain, I also feel that the car, on stock tires, loves to hydroplane.

Please, do yourself, and all of us, a favor and leave your traction control on in the rain. :p
because of how wide the tires are.
 

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Discussion Starter #13 (Edited)
I'm a pretty cautious driver and I have enough experience to know when I need to slow down when the weather's not best. Also, of course I leave TCS on in the rain. :p
I wanted to see if the slipping was typical of rwd which doesn't seem to be the case. It looks like I'm going to have to take another trip to the dealership.

As for the tires, I bought my gen used, 3.8 track. The rear tires are stock, but whoever the last owner was decided to slap on fronts that are the same size as the rears which are obviously the wrong size -__- turns out, I figured it causes the traction control to turn on unnecessarily whenever I go over any small bumps that happen to be on the freeway.
Dealer says that the tires passed state inspection so they wouldn't do anything about them besides "recommending" me to buy the correct tire sizes. I wish they had at least told me that the tire sizes were a bit off at the time I bought it. Already a bit off topic and some griping, but damn I hate the dealership. The only good they've done so far was giving a free car wash, but even then it took over an hour after I was told it was ready and they left swirl marks everywhere.
 

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So, do you think your rears are slipping because your traction control is cutting in and out, and the reason for that is your dealer sold you an improperly equipped car? I think your pretty much on topic.

You know if you get in an accident the dealer could be liable, specially in the good old USA.
 

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Get the right sized tires on it as soon as you can and have them check the alignment as well. I bought a car used that used to feel the same way every time it rained and it turned out the rear tires were both canted in fairly badly and that was causing it.
 

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I'm a pretty cautious driver and I have enough experience to know when I need to slow down when the weather's not best. Also, of course I leave TCS on in the rain. :p
I wanted to see if the slipping was typical of rwd which doesn't seem to be the case. It looks like I'm going to have to take another trip to the dealership.

As for the tires, I bought my gen used, 3.8 track. The rear tires are stock, but whoever the last owner was decided to slap on fronts that are the same size as the rears which are obviously the wrong size -__- turns out, I figured it causes the traction control to turn on unnecessarily whenever I go over any small bumps that happen to be on the freeway.
Dealer says that the tires passed state inspection so they wouldn't do anything about them besides "recommending" me to buy the correct tire sizes. I wish they had at least told me that the tire sizes were a bit off at the time I bought it. Already a bit off topic and some griping, but damn I hate the dealership. The only good they've done so far was giving a free car wash, but even then it took over an hour after I was told it was ready and they left swirl marks everywhere.
If there's any truth to the many threads about it on the forums, the "square" tire setup could be causing your TCS to go nuts. Boo to your dealer.
 

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Here's the answers for you:

1) Most vehicles today which are equipped with TPMS are required to have all (4) tires changed when replacing tires. The reason being is the some TPMS systems are more sensative than others and even the slightest difference in tread height (or tread wear) can cause the TPMS to falsely activate such systems as ABS and/or TCS. Due to the differences in tires (sizing or tread height), the systems sense the variance tire rotations and the car (or systems) believe that there is slippage (tire not adhering to road surface).

Yes, it's costly to replace all 4 tires if only needing two - but due to the vehicle technology today, you can either live with it (or should have done more research due to higher maintenance costs) or you can find ways to cheat or bypass such sensor systems.

2) You stated you have the Track model. Based on that alone, don't the Track models come with 19" "Summer Only" tires? If so, that is anohter issue. Most tire manufacturers will deem tires "Summer Only" for geograhic locations that are mainly 1) dry and 2) do not experience the 4 Seasons as far as rain/snow/ice. A "Summer Only" tire is mainly designed for warm to hot DRY traction and usually are NOT safe running at speed during wet, icy or snowy conditions. Those are NOT All Season radial tires and grip is greatly diminished in such conditions.

Factually speaking, I've had performance vehicles with both All Season and "Summer Only" tires - there's a definitive difference in performance of both and a very NOTICEABLE difference running Summer Only tires in bad weather.

Definitely get the correct size/type of tires back on that vehicle.
 

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Here's the answers for you:

1) Most vehicles today which are equipped with TPMS
Good points, but I'm pretty sure you mean TCS, not Tire Pressure Monitoring System :)

Me and you have different meanings for the word "slipping".
If there's "slipping" involved I'm probably looking at the person behind me through my passenger window.
TCS works on the engineer's definition of slipping. That is the tire moving sliding relative to the pavement. This starts happening long before you lose all traction and start doing 360s down the highway. In fact it happens all the time during normal driving and TCS ignores slight slips. Thats why a square setup makes the car suck, because TCS becomes super neurotic about the slips that are always happening and cuts back powah.
 
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