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03-29-2011, 10:27 AM | #1 |
Scooby Guru
Member#: 158864
Join Date: Sep 2007
Location: Aussieland
Vehicle:2003 SOHC destroker |
what oil are you guys running in your 5 speeds?
about to make the move to straight cut gears. should i stick with my motul gear 300?
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03-29-2011, 12:19 PM | #2 |
ForumWars Winner!
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TXIC
Location: Kyle, TX
Vehicle:2003 Forester Silver |
Gear 300 should be fine, makes my short list for racing gearbox oils.
1. Motul Gear 300 75w-90 2. AMSOIL Severe Gear 75w-90 3. SOA Go EXTRA-S 75w-90 (light duty/autocross) |
03-29-2011, 04:09 PM | #3 |
Scooby Guru
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Vehicle:2004 Forester STI Silver |
You can't really go wrong with #1 or #2. #3 is a petroleum based oil, so the folks living in colder climates who see sub-freezing temperatures may opt to shy away from it for winter use or at least expect poor shifting and double clutching till some heat gets into it. Above a certain viscosity, these trannies stop shifting work crap.
If you're serious about driving, an option would be a higher capacity rear diff cover. http://www.perrinperformance.com/pro...ry=68&model=33 Heat is the main cause of oil break down, and with the low capacity of the rear diff, it is the first to ramp up in heat. I will say it takes a LOT to get to a bad state in the first place, but I'm just tossing the idea out there. Any particular reason for the straight cut gears versus sticking to helical? |
03-29-2011, 09:31 PM | #4 |
Former Vendor
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Having been road racing subies since the 90s, we've found the Amsoil 80w90 to be great gear/diff fluid for the 5MTs. On the 02-03 WRX the Extra S will help get rid of some of the problems associated with them but running straight gears you won't have those issues.
I would go with the Amsoil or the Motul, both great choices. -mike AIM: AZP Installs | E-mail: [email protected] | 725 Fairfield Ave | Kenilworth, NJ 07033 | T-1 Certified Amsoil Dealer "Race Tested, Enthusiast Approved!" |
03-29-2011, 10:16 PM | #5 |
Scooby Newbie
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Join Date: Dec 2005
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Swepco 201...not cheap but definitely race proven.
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03-29-2011, 10:44 PM | #6 |
Scooby Guru
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RMIC
Location: Clinton, UT
Vehicle:15 WRX, 83 DR30, 93 R32 GTS-T, 93 R32 GTR |
Which brand straight cuts.
Andrewtech recommends to use straight Redline lightweight shockproof if you are using PPG. That is what I run. |
03-29-2011, 11:31 PM | #7 | |
Scooby Specialist
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Join Date: Jun 2003
Location: Oklahoma City
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03-30-2011, 12:31 AM | #8 |
Scooby Guru
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RMIC
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Vehicle:15 WRX, 83 DR30, 93 R32 GTS-T, 93 R32 GTR |
Ive been using it in my PPG box for road racing making ~520whp. I change it every 2 outings.
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03-30-2011, 06:39 AM | #9 |
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lw shockproof for me also. ran it in my stock 02 gearbox and had no issues. changed to ra gears for better ratios and still run it with no issues. for ppg, i would do what andrewtech recommends
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03-30-2011, 07:24 AM | #10 | |||
Scooby Guru
Member#: 158864
Join Date: Sep 2007
Location: Aussieland
Vehicle:2003 SOHC destroker |
Quote:
Quote:
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consensus seems to be motul 300 or redline LW shockproof from what i can tell. |
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03-30-2011, 07:43 AM | #11 |
Scooby Guru
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MAIC
Location: Silver Spring, MD
Vehicle:Dad- Core OG |
I really did not like Motul 300 in my RallyCross car. Shifting was notchy with occasional grinds.
Switched to LW Shockproof and that went away. |
03-30-2011, 12:51 PM | #12 |
Scooby Specialist
Member#: 24568
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Chapter/Region:
Tri-State
Location: Reading PA KB3UOQ
Vehicle:1993 Impreza, WRX drive train, Open class |
How frequently do you guys change your trans oil?
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03-30-2011, 02:00 PM | #13 |
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Vehicle:RA East Open Class Champs 07-08-09 |
on the Open Cass car, we do teh trans oil every 2 or 3 events
on the RS race car it was more like 2x per season due to lower trans stresses |
03-30-2011, 05:04 PM | #14 |
Scooby Guru
Member#: 158864
Join Date: Sep 2007
Location: Aussieland
Vehicle:2003 SOHC destroker |
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03-30-2011, 07:07 PM | #15 |
ForumWars Winner!
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2x per season for me, rear diff 1x per season.
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03-30-2011, 08:23 PM | #16 |
Former Vendor
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We run Neo 75w90HD since 2007 on the straight cut dogbox, and its been happy so far..
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03-30-2011, 10:50 PM | #17 |
Scooby Specialist
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Vehicle:2000 Impreza 2.5RS Becasue racecar |
Been running Shockproof SLW in my RS since 2001 with many track days and countless autocrosses. Car has 280K on it now.
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03-31-2011, 11:59 AM | #18 |
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Straight cut or helical is totally irrelevant when it comes to gear oil. What does matter though is synchronized or dog engagement. If it's synchronized, use Mobil 1 Delvac. If it's dog bog, it's still a great oil, though the Redline would be a good choice as well. I do NOT like Redline in synchronized gearboxes on racecars.
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03-31-2011, 01:47 PM | #19 |
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my 5-speeds loved redline shockproof...I'd run heavy in the summer time.
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03-31-2011, 07:40 PM | #20 |
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Vehicle:2005 wrx blue wrc |
gears
hypoy C gear oil. castrol i think...
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03-31-2011, 09:11 PM | #21 |
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Vehicle:03 WRX (NAVY Camo) in"Special Ed." Run Group |
I use 1 part Motul Gear 300 and the balance of fill up with Redline LW Shockproof.
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03-31-2011, 09:14 PM | #22 |
Scooby Specialist
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Location: Peoples Republik of Cambridge
Vehicle:WRX' 04Road02gravel www.ToltecRally.com |
In my DD RL LW shockproof, in the rallycar RL 75/90NS. They don't like it the other way around.
Rally car gets gear oil swapped every 3 events (that includes a practice day) |
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