overheating sti 6mt?

cowboy_Rob · 06-01-2010, 05:48 PM

i have a thread in the trans forum but i thought i would check here if any of you are having issues with notchy shifting or overheating the sti trans? yesterday it was in the mid 90's out and after driving on the highway for about an hour then parking for an hour and driving some more i noticed that the trans was really notchy. im planning on changing the fluid but are any of you that do road race/endurance having problems with heat? what are you doing to fix it? it shifted fine this morning after it cooled off so i think its heat related. i also have a fmic and a rs hood with no scoop.

MasterKwan · 06-01-2010, 06:49 PM

I think you don't have Subaru Extra S in the transmission and it's eating the Synchros.

Wintershredder · 06-01-2010, 07:21 PM

Quote:

Originally Posted by MasterKwan

I think you don't have Subaru Extra S in the transmission and it's eating the Synchros.

+1

Extra S only!

555ideways · 06-01-2010, 08:21 PM

This question is regarding a 6mt in 90deg street traffic? It runs about 400deg F hotter on a track and Should not grind under either condition.

MasterKwan · 06-01-2010, 08:30 PM

I question the 400 degree comment. I'll bet it's running 200-240 degrees on track.

dwx · 06-01-2010, 09:18 PM

The old Spec C 6MT had an external transmission cooler stock, but I'm not sure what the exact reason for it was. I did track days with and without one and didn't really notice much difference.

mav1c · 06-01-2010, 10:12 PM

I run Valvoline 75W90 Synthetic trans oil in my strictly track STI, and never have a problem. Sounds to me like you need to change the trans oil ASAP and see if that helps.

Prevent · 06-01-2010, 10:25 PM

motul gear 300, love it... put it in at 30k at 57k feels specatcular. i plan on putting it in again at 60k

STi-MAN · 06-01-2010, 10:32 PM

Motul in mine.. love it.

subydude · 06-02-2010, 09:39 AM

Castrol Syntec 75-90 in mine with lots of autox and track days. No problems so far and it's good in both hot and cold weather.

MasterKwan · 06-02-2010, 10:21 AM

You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it?

I believe Extra-S was a response to premature Synchro wear problems in the 6MT's.

cowboy_Rob · 06-02-2010, 11:18 AM

Quote:

Originally Posted by MasterKwan

You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it?

I believe Extra-S was a response to premature Synchro wear problems in the 6MT's.

i just called my local subaru dealer parts department and asked for a price on extra s and they didnt even know what i was talking about they say they just use bulk 80w90. you never know what they are doing back there lol

RB5 Clone · 06-02-2010, 11:35 AM

r u sure the prob is not clutch related? is pedal feeling strange or soft? mebbe clutch master cyl needs bleedin

boost junkie · 06-02-2010, 01:27 PM

Quote:

Originally Posted by MasterKwan

You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it?

I believe Extra-S was a response to premature Synchro wear problems in the 6MT's.

I've run extra-s and motul gear 300 in my trans over the course of around 45k miles (many of them on track). I had significantly smoother shifting and zero synchro problems with the gear 300, so that's what I'll stick with. Just because extra-s was specifically formulated for the 6-speed doesn't mean there isn't better stuff out there.

STi-MAN · 06-02-2010, 03:18 PM

Quote:

Originally Posted by boost junkie

I've run extra-s and motul gear 300 in my trans over the course of around 45k miles (many of them on track). I had significantly smoother shifting and zero synchro problems with the gear 300, so that's what I'll stick with. Just because extra-s was specifically formulated for the 6-speed doesn't mean there isn't better stuff out there.

This, I've never tried extra-S but i've really liked how motul has held up at the track. so i'll stick with it.

Deuce Cam · 06-02-2010, 02:41 PM

Quote:

Originally Posted by MasterKwan

You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it?

I believe Extra-S was a response to premature Synchro wear problems in the 6MT's.

I somewhat buy this, but if it's really that important you'd think Subaru would make it more readily available and at least educate dealership parts/service departments of it's existence. As an example Subaru LSD oil with part # is listed in the service manual. Nowhere does Subaru make mention of using their transmission fluid, not even a recommendation.

Counterfit · 06-07-2010, 05:19 PM

Quote:

Originally Posted by MasterKwan

You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it?

Where did you get the idea that Valvoline SynPower, Castrol Syntec, and Motul Gear 300 are cheap?

MasterKwan · 06-02-2010, 12:03 PM

Quote:

i just called my local subaru dealer parts department and asked for a price on extra s and they didnt even know what i was talking about they say they just use bulk 80w90. you never know what they are doing back there lol

I know for a fact that my Suby dealer puts in crap oil and then charges full price for a new tranny when the old one starts grinding at 50K miles.

https://www.subarugenuineparts.com/p...oducts_id=1073

Homemade WRX · 06-02-2010, 12:36 PM

my dealership puts in regular oil too as they don't wanna hassle with how subaru doesn't sell extra-s by the quart.

I'm another regular 75-90 user. Next go around I'm think I'm tossing in some redline shock proof to my cocktail.

coolblue05 · 06-02-2010, 02:05 PM

Motul Gear 300 is all I use in my 6MT!!!! Love it!!

If you did a survey, you would find that is what the vast majority of STi track cars use.

RB5 Clone · 06-02-2010, 02:32 PM

we run Motul Gear FF in the rally car, it not only keeps 6MT runnin cool and collected it makes the LSDs happy too.

MasterKwan · 06-02-2010, 02:37 PM

I think Gear 300 is good too, hell for all I know Extra-S IS Gear 300. It's not the stuff you buy at the local parts store though.

CKxx · 06-02-2010, 06:27 PM

Is this the correct stuff?

http://www.google.com/products?hl=en...ed=0CCsQrQQwAA

Where can you find it, besides the internets?

Prevent · 06-02-2010, 06:31 PM

yea thats it

local shops normally carry it

MasterKwan · 06-03-2010, 09:24 AM

Quote:

I somewhat buy this, but if it's really that important you'd think Subaru would make it more readily available and at least educate dealership parts/service departments of it's existence.

I'll give you my local dealership as an example. For a number of years they had and used Extra-S. It's easy for the dealership to get. That's where I got mine. Then they decided to save some money and time so, they started to just use the gear oil from the 50 gallon barrels. What do they care if the syncho's go bad in the tranny's? You can't prove it's their fault and they make good money replacing transmissions.

I thought that Extra-S and Gear 300 felt about the same.

06-01-2010, 05:48 PM	#1
cowboy_Rob Scooby Specialist Member#: 194062 Join Date: Nov 2008 Chapter/Region: MAIC Location: Camp Hill PA Vehicle: 2003 Impreza WRX PSM	overheating sti 6mt? i have a thread in the trans forum but i thought i would check here if any of you are having issues with notchy shifting or overheating the sti trans? yesterday it was in the mid 90's out and after driving on the highway for about an hour then parking for an hour and driving some more i noticed that the trans was really notchy. im planning on changing the fluid but are any of you that do road race/endurance having problems with heat? what are you doing to fix it? it shifted fine this morning after it cooled off so i think its heat related. i also have a fmic and a rs hood with no scoop.

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06-01-2010, 06:49 PM	#2
MasterKwan Scooby Guru Member#: 98961 Join Date: Oct 2005 Chapter/Region: MAIC Location: NOVA Vehicle: 2003 WRX Black	I think you don't have Subaru Extra S in the transmission and it's eating the Synchros.

06-01-2010, 08:21 PM	#4
555ideways Scooby Specialist Member#: 36652 Join Date: May 2003 Chapter/Region: NESIC	This question is regarding a 6mt in 90deg street traffic? It runs about 400deg F hotter on a track and Should not grind under either condition.

06-01-2010, 08:30 PM	#5
MasterKwan Scooby Guru Member#: 98961 Join Date: Oct 2005 Chapter/Region: MAIC Location: NOVA Vehicle: 2003 WRX Black	I question the 400 degree comment. I'll bet it's running 200-240 degrees on track.

06-01-2010, 09:18 PM	#6
dwx Scooby Guru Member#: 8343 Join Date: Jul 2001 Chapter/Region: MWSOC Location: Atlanta, GA Vehicle: 2005 2012 Jeep 2013 DGM BRZ	The old Spec C 6MT had an external transmission cooler stock, but I'm not sure what the exact reason for it was. I did track days with and without one and didn't really notice much difference.

06-01-2010, 10:12 PM	#7
mav1c Hoodbridge! Moderator Member#: 560 Join Date: Nov 1999 Chapter/Region: MAIC Location: Woodbridge, VA Vehicle: 2006 STi, '11 A4 Crystal Gray, Silver	I run Valvoline 75W90 Synthetic trans oil in my strictly track STI, and never have a problem. Sounds to me like you need to change the trans oil ASAP and see if that helps.

06-01-2010, 10:25 PM	#8
Prevent * Banned * Member#: 149114 Join Date: May 2007 Location: I'm too mainstream	motul gear 300, love it... put it in at 30k at 57k feels specatcular. i plan on putting it in again at 60k

06-01-2010, 10:32 PM	#9
STi-MAN Scooby Guru Member#: 70252 Join Date: Sep 2004 Vehicle: 05 STI blue	Motul in mine.. love it.

06-02-2010, 09:39 AM	#10
subydude Scooby Specialist Member#: 80649 Join Date: Jan 2005 Chapter/Region: South East Location: Columbia, SC Vehicle: 2000 2.5 Auto-X RSTi What's A Head Gasket?	Castrol Syntec 75-90 in mine with lots of autox and track days. No problems so far and it's good in both hot and cold weather.

06-02-2010, 10:21 AM	#11
MasterKwan Scooby Guru Member#: 98961 Join Date: Oct 2005 Chapter/Region: MAIC Location: NOVA Vehicle: 2003 WRX Black	You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it? I believe Extra-S was a response to premature Synchro wear problems in the 6MT's.

06-02-2010, 11:35 AM	#13
RB5 Clone Scooby Specialist Member#: 30909 Join Date: Dec 2002 Chapter/Region: NESIC Location: lastditchracing.net & 03 STI Vehicle: RA East Open Class Champs 07-08-09	r u sure the prob is not clutch related? is pedal feeling strange or soft? mebbe clutch master cyl needs bleedin

06-02-2010, 12:36 PM	#19
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	my dealership puts in regular oil too as they don't wanna hassle with how subaru doesn't sell extra-s by the quart. I'm another regular 75-90 user. Next go around I'm think I'm tossing in some redline shock proof to my cocktail.

06-02-2010, 02:05 PM	#20
coolblue05 NASIOC Supporter Member#: 39169 Join Date: Jul 2003 Chapter/Region: MWSOC Location: near Toledo, OH Vehicle: 2005 STi, s2000 Tuned Perfection	Motul Gear 300 is all I use in my 6MT!!!! Love it!! If you did a survey, you would find that is what the vast majority of STi track cars use.

06-02-2010, 02:32 PM	#21
RB5 Clone Scooby Specialist Member#: 30909 Join Date: Dec 2002 Chapter/Region: NESIC Location: lastditchracing.net & 03 STI Vehicle: RA East Open Class Champs 07-08-09	we run Motul Gear FF in the rally car, it not only keeps 6MT runnin cool and collected it makes the LSDs happy too.

06-02-2010, 02:37 PM	#22
MasterKwan Scooby Guru Member#: 98961 Join Date: Oct 2005 Chapter/Region: MAIC Location: NOVA Vehicle: 2003 WRX Black	I think Gear 300 is good too, hell for all I know Extra-S IS Gear 300. It's not the stuff you buy at the local parts store though.

06-02-2010, 06:27 PM	#23
CKxx Scooby Specialist Member#: 33458 Join Date: Feb 2003 Chapter/Region: Tri-State Location: PA Vehicle: Your BOV sounds lame 93 RX7+09 Forester	Is this the correct stuff? http://www.google.com/products?hl=en...ed=0CCsQrQQwAA Where can you find it, besides the internets?

06-02-2010, 06:31 PM	#24
Prevent * Banned * Member#: 149114 Join Date: May 2007 Location: I'm too mainstream	yea thats it local shops normally carry it