diff issues... i think

***kwlsti*** · 12-02-2005, 07:37 AM

This only happens racing when I get on the gas right after a corner. It sounds like the dif, rear but maybe center, is binding... sorta like when you turn on the DCCD and turn a corner, but I have it on auto... after it feel and sounds like binding, it releases with a nice clunk and a shot of power. I’m bringing it into the dealer, but anyone have any ideas?<O

***sciolist*** · 12-02-2005, 08:15 AM

Thoughts:

* Have you checked the oil level and cleanliness?
* Have you replaced the oil, and if so, with what?
* Are you lifting the inside rear and putting it back down on throttle?
* Are you LFB'ing and lifting on entry?
* What's your DCCD setting? Have you tried changing it?
* If you are lifting the inside rear, have you tried less rear bar? No rear bar?
* What tires and spring rates are you using?

***kwlsti*** · 12-02-2005, 08:30 AM

Quote:

Originally Posted by sciolist

Thoughts:

* Have you checked the oil level and cleanliness?
* Have you replaced the oil, and if so, with what?
* Are you lifting the inside rear and putting it back down on throttle?
* Are you LFB'ing and lifting on entry?
* What's your DCCD setting? Have you tried changing it?
* If you are lifting the inside rear, have you tried less rear bar? No rear bar?
* What tires and spring rates are you using?

oil level and cleanliness good. rear dif is Subaru lsd oil, and center is ams oil sever gear.
i am lifting, but it doesn’t matter it happens either way. I’m not LFB at all. i have a whiteline 24mm bar in the back but i was put on in the beginning of the season when it wasn't happening at all.
suspension I’m using pinks by akri(sp) and ohins

***sciolist*** · 12-02-2005, 08:56 AM

There have been reports of rear differentials failing due to lifting under throttle with race tires. I have not personally had a problem with this (knock wood) and there are certainly a number of '04s out there with many, many runs on race tires and no rear differential problems - yet.

Maybe the problem isn't really related to autoX, but that does present itself as a likely culprit. The reason I bring it up is that if lifting is the problem, you could take measures to reduce it in terms of suspension tuning and driving technique.

Maybe it's just wearing out for other reasons, though.

***kwlsti*** · 12-02-2005, 10:47 AM

lol could be, i'll see what the dealer says

thanks

Chris05STi · 12-02-2005, 11:25 AM

Yah, let me know what the dealer says, this should be interesting..!

***kwlsti*** · 12-14-2005, 11:28 AM

well i just heard back from the dealer and they took out the rear diff and looked at it and theres nothing wrong at all

the fluid he said was a little dirty, but not overly...
well i guess i'll just have to wait till next seasion and see if it's still there...

Seranin · 12-14-2005, 12:48 PM

i made a post about this a few days ago... i can't say I ever noticed a *sound*, but certainly the feeling was there, it wouldn't put the power down smoothly if the wheel is cranked, the rear will skip around unless I am pretty gentle on the throttle.

***kwlsti*** · 12-14-2005, 02:24 PM

this is very loud.
and it dosn't feel like the rear end is skipping at all, just like it's lost power then it comes back with a big bang.

Matt30 · 12-14-2005, 04:09 PM

Mid-corner all the way to exit auto will progressivly lock the center to give the best traction and limit oversteer (if any).

Try the same thing in manual mode with the dccd unlocked. You should not feel the same thing.

***kwlsti*** · 12-14-2005, 04:44 PM

it was worse when we took it out of auto....

12-02-2005, 07:37 AM	#1
*kwlsti* an old tired whore Car: 04 Subaru STi Fav Mod: myself Location: Scarborough, Ont, Canada Posts: 5,576 IWSTI Addict since: Apr 2004 Trader Rating: (6)	diff issues... i think This only happens racing when I get on the gas right after a corner. It sounds like the dif, rear but maybe center, is binding... sorta like when you turn on the DCCD and turn a corner, but I have it on auto... after it feel and sounds like binding, it releases with a nice clunk and a shot of power. I’m bringing it into the dealer, but anyone have any ideas?<O This ad is not endorsed by this member. Please register or login to hide this ad.

12-02-2005, 08:15 AM	#2
*sciolist* Spiteful Old Codger Location: Bend, OR Posts: 2,345 IWSTI Addict since: Jul 2003 Trader Rating: (1)	Thoughts: * Have you checked the oil level and cleanliness? * Have you replaced the oil, and if so, with what? * Are you lifting the inside rear and putting it back down on throttle? * Are you LFB'ing and lifting on entry? * What's your DCCD setting? Have you tried changing it? * If you are lifting the inside rear, have you tried less rear bar? No rear bar? * What tires and spring rates are you using? Last edited by sciolist; 12-02-2005 at 08:21 AM.

12-14-2005, 04:44 PM	#11
*kwlsti* an old tired whore Car: 04 Subaru STi Fav Mod: myself Location: Scarborough, Ont, Canada Posts: 5,576 IWSTI Addict since: Apr 2004 Trader Rating: (6)	it was worse when we took it out of auto.... This ad is not endorsed by this member. Please register or login to hide this ad.

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12-02-2005, 08:56 AM	#4
*sciolist* Spiteful Old Codger Location: Bend, OR Posts: 2,345 IWSTI Addict since: Jul 2003 Trader Rating: (1)	There have been reports of rear differentials failing due to lifting under throttle with race tires. I have not personally had a problem with this (knock wood) and there are certainly a number of '04s out there with many, many runs on race tires and no rear differential problems - yet. Maybe the problem isn't really related to autoX, but that does present itself as a likely culprit. The reason I bring it up is that if lifting is the problem, you could take measures to reduce it in terms of suspension tuning and driving technique. Maybe it's just wearing out for other reasons, though.

12-02-2005, 10:47 AM	#5
*kwlsti* an old tired whore Car: 04 Subaru STi Fav Mod: myself Location: Scarborough, Ont, Canada Posts: 5,576 IWSTI Addict since: Apr 2004 Trader Rating: (6)	lol could be, i'll see what the dealer says thanks

12-02-2005, 11:25 AM	#6
Chris05STi I Has a Turbo Timer Car: 2005 Subaru WRX STi Fav Mod: Every single one! Location: NJ Posts: 10,066 IWSTI Addict since: Jun 2005 Trader Rating: (29)	Yah, let me know what the dealer says, this should be interesting..!

12-14-2005, 11:28 AM	#7
*kwlsti* an old tired whore Car: 04 Subaru STi Fav Mod: myself Location: Scarborough, Ont, Canada Posts: 5,576 IWSTI Addict since: Apr 2004 Trader Rating: (6)	well i just heard back from the dealer and they took out the rear diff and looked at it and theres nothing wrong at all the fluid he said was a little dirty, but not overly... well i guess i'll just have to wait till next seasion and see if it's still there...

12-14-2005, 12:48 PM	#8
Seranin Professional STI Racer Car: '06 EB Evo IX / SSL Location: Eureka, CA Posts: 689 IWSTI Addict since: Feb 2004 Trader Rating: (1)	i made a post about this a few days ago... i can't say I ever noticed a sound, but certainly the feeling was there, it wouldn't put the power down smoothly if the wheel is cranked, the rear will skip around unless I am pretty gentle on the throttle.

12-14-2005, 02:24 PM	#9
*kwlsti* an old tired whore Car: 04 Subaru STi Fav Mod: myself Location: Scarborough, Ont, Canada Posts: 5,576 IWSTI Addict since: Apr 2004 Trader Rating: (6)	this is very loud. and it dosn't feel like the rear end is skipping at all, just like it's lost power then it comes back with a big bang.

12-14-2005, 04:09 PM	#10
Matt30 Junior STI Driver Car: 01 Subaru WRX STi Spec C Fav Mod: Coming Soon Posts: 146 IWSTI Addict since: Jul 2005 Trader Rating: (0)	Mid-corner all the way to exit auto will progressivly lock the center to give the best traction and limit oversteer (if any). Try the same thing in manual mode with the dccd unlocked. You should not feel the same thing.