donut question

choonzAWR · 04-01-2004, 08:39 AM

i have a donut on my rear left side. will this screw with the differentials? if so.. is there a light in the dash that says "differential prob." or something like it?

RemlapaN · 04-01-2004, 05:24 PM

for a short ride (very very short), it wont hurt it, but if you drive lets say... 100mi on it, you might start to damage the DCCD, since it will be constantly adjusting power to the front wheels. The reason it does this is that because the donut is smaller, the wheelspeed for that tire is higher. Therefore, the car thinks your left-rear wheel never has traction, which makes the DCCD system compensate. Better get it fixed ASAP!

WE_R_ND · 04-01-2004, 05:42 PM

Wow I never thought of that being a problem but I understand why it would be. Good thing for everyone to see so they don't drive on a dognut too long.

choonzAWR · 04-01-2004, 08:30 PM

ok whew...i got it out today... now i have a set of kumho's on both the rears, and the potenza's on the both the fronts. Does this affect anything? differentials? turning? going at high speeds? etc....

ERacer · 04-02-2004, 08:59 AM

Not recommended to mix brands. Also if there is more than ¼ of an inch in rolling diameter between the front and rear you will start to do damage to the drive train.

srf · 04-02-2004, 10:44 AM

What if you have the DCCD set manually so the computer isn't balancing between the front & rear?

Alternately if DCCD was set to auto & you weren't giving it much gas would there still be a risk of damage?

ss3homer · 04-02-2004, 10:59 AM

it is never 100% to one side, they are both getting some amount of power

04-01-2004, 08:39 AM	#1
choonzAWR Professional STI Driver Car: Aspen White 04 STi Location: Bristow, VA Posts: 421 IWSTI Addict since: May 2003 Trader Rating: (0)	i have a donut on my rear left side. will this screw with the differentials? if so.. is there a light in the dash that says "differential prob." or something like it? This ad is not endorsed by this member. Please register or login to hide this ad.

04-02-2004, 10:59 AM	#7
ss3homer Grassroots STI Racer Car: Modding Business Fav Mod: Day-Trader Location: Denver, The BIG CO Posts: 531 IWSTI Addict since: Dec 2003 Trader Rating: (0)	it is never 100% to one side, they are both getting some amount of power This ad is not endorsed by this member. Please register or login to hide this ad.

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04-01-2004, 05:24 PM	#2
RemlapaN Professional STI Racer Car: 04 WRB STi Fav Mod: Hydramist + GT52 Location: Northeast PA Posts: 696 IWSTI Addict since: Mar 2004 Trader Rating: (0)	for a short ride (very very short), it wont hurt it, but if you drive lets say... 100mi on it, you might start to damage the DCCD, since it will be constantly adjusting power to the front wheels. The reason it does this is that because the donut is smaller, the wheelspeed for that tire is higher. Therefore, the car thinks your left-rear wheel never has traction, which makes the DCCD system compensate. Better get it fixed ASAP!

04-01-2004, 05:42 PM	#3
WE_R_ND Spec C Club Fav Mod: Track Time Location: Des Moines, IA Posts: 2,267 IWSTI Addict since: Jan 2004 Trader Rating: (0)	Wow I never thought of that being a problem but I understand why it would be. Good thing for everyone to see so they don't drive on a dognut too long.

04-01-2004, 08:30 PM	#4
choonzAWR Professional STI Driver Car: Aspen White 04 STi Location: Bristow, VA Posts: 421 IWSTI Addict since: May 2003 Trader Rating: (0)	ok whew...i got it out today... now i have a set of kumho's on both the rears, and the potenza's on the both the fronts. Does this affect anything? differentials? turning? going at high speeds? etc....

04-02-2004, 08:59 AM	#5
ERacer Chuck taught me everything I know Car: 04 Subaru WRX STi Location: Texas Ranger Country Posts: 501 IWSTI Addict since: Oct 2003 Trader Rating: (0)	Not recommended to mix brands. Also if there is more than ¼ of an inch in rolling diameter between the front and rear you will start to do damage to the drive train.

04-02-2004, 10:44 AM	#6
srf STI Driver Car: 04 STi Fav Mod: Driving Location: Bothell, WA Posts: 289 IWSTI Addict since: Mar 2004 Trader Rating: (0)	What if you have the DCCD set manually so the computer isn't balancing between the front & rear? Alternately if DCCD was set to auto & you weren't giving it much gas would there still be a risk of damage?