Gear Oil - Mazda3 Forums : The #1 Mazda 3 Forum
Reply
 
LinkBack Thread Tools
post #1 of 42 (permalink) Old 08-27-2008, 09:58 AM Thread Starter
Le Mans: GT Class
 
Join Date: Sep 2006
Location: Saint John, NB, Canada
Posts: 505
Gear Oil

I was looking at buying some gear oil for a change in the next few months.

I was wondering if anyone could tell me if I used 75W80 for gear oil instead of the stock 75W90 if there would be an issue?

2007 True Red Mazdaspeed 3|CPE CAI|TRZ MM (Poly)|Hoen Xenonmatch Fogs/Highs |Hotchkis RSB|Prosport Boost Gauge|BCC|18x8 OZ Ultraleggera Matte Black|Gorilla Black Lugs|G2 Red Calipers|Autoexe SS Brake Lines|Chromium Signals|Hella Supertone|sk07 Accel Pedal|CPE DP|Cobb SW|Evo TT|Dual AeroForce|TS BOV|Denso ITV22 Plugs
110100100 is offline  
Sponsored Links
Advertisement
 
post #2 of 42 (permalink) Old 08-27-2008, 04:45 PM
Go-Kart Driver
 
Join Date: Jul 2008
Posts: 54
Re: Gear Oil

Dont know but I hear great things about redline mt-90...
dcs191919 is offline  
post #3 of 42 (permalink) Old 08-27-2008, 05:16 PM
Moped Rider
 
Join Date: Feb 2008
Location: Chicago
Posts: 14
Re: Gear Oil

Stick with 75-90w, the LSD seems sensitive to gear oil. Not sure if 75-80w would be good or bad?

I replace mine gear oil with a quality synthetic 75-90w and had a "wah wah wah" noise when low speed turning from the LSD. Had the dealer replaced with stock 75-90w and fiction modifier. The noise went away.

crypt0wind is offline  
post #4 of 42 (permalink) Old 08-27-2008, 07:58 PM Thread Starter
Le Mans: GT Class
 
Join Date: Sep 2006
Location: Saint John, NB, Canada
Posts: 505
Re: Gear Oil

Yeah I think I might make sure to stay with the 90.

2007 True Red Mazdaspeed 3|CPE CAI|TRZ MM (Poly)|Hoen Xenonmatch Fogs/Highs |Hotchkis RSB|Prosport Boost Gauge|BCC|18x8 OZ Ultraleggera Matte Black|Gorilla Black Lugs|G2 Red Calipers|Autoexe SS Brake Lines|Chromium Signals|Hella Supertone|sk07 Accel Pedal|CPE DP|Cobb SW|Evo TT|Dual AeroForce|TS BOV|Denso ITV22 Plugs
110100100 is offline  
post #5 of 42 (permalink) Old 09-02-2008, 12:30 AM
Bicycle Rider
 
Join Date: Aug 2007
Posts: 3
Re: Gear Oil

[quote author=crypt0wind link=topic=121737.msg2571522#msg2571522 date=1219871805]
Stick with 75-90w, the LSD seems sensitive to gear oil. Not sure if 75-80w would be good or bad?

I replace mine gear oil with a quality synthetic 75-90w and had a "wah wah wah" noise when low speed turning from the LSD. Had the dealer replaced with stock 75-90w and fiction modifier. The noise went away.


[/quote]
What was the synthetic oil that you used?
labikesrcool is offline  
post #6 of 42 (permalink) Old 09-02-2008, 12:28 PM
Go-Kart Driver
 
Join Date: Aug 2007
Location: SE Michigan
Posts: 94
Re: Gear Oil

Is that "wah wah wah" noise what's typically described as LSD chatter? I have MT90 installed and I have the same noise; it doesn't sound like any kind of "chatter" to me.

The noise is worst when cold and doesn't necessarily go away when it warms up. How much of an issue is it thought to be?

Brian
Street Tire D-Stock
bacarl is offline  
post #7 of 42 (permalink) Old 09-03-2008, 05:39 PM
Moped Rider
 
Join Date: Feb 2008
Location: Chicago
Posts: 14
Re: Gear Oil


What was the synthetic oil that you used?
[/quote]

Valvoline full synthetic 75-90 @ oil change place.

[quote author=bacarl link=topic=121737.msg2582785#msg2582785 date=1220372882]
Is that "wah wah wah" noise what's typically described as LSD chatter? I have MT90 installed and I have the same noise; it doesn't sound like any kind of "chatter" to me.

The noise is worst when cold and doesn't necessarily go away when it warms up. How much of an issue is it thought to be?
[/quote]

Not sure if the noise is a issue, but once I started to hear the "wah wah wah" I thought something was wrong. It sounded like a bad wheeling bearing or something on the front passenger side. So I had the dealer take a look for a bad bearing and the tech told me that the LSD was slipping with the synthetic gear oil. All I knew was I didn't hear it before the gear oil change.

Once Mazda replaced the gear oil with stock gear oil and added fiction modifier the noise was gone.

Call it "chatter" or "wah wah" it's the likely the LSD slipping. The synthetic might be too good and slick.

Is the synthetic gear oil doing damage? Likely no, but I'm not a tech.

I just didn't like the noise and glad it's gone.
crypt0wind is offline  
post #8 of 42 (permalink) Old 09-04-2008, 07:29 PM
Moped Rider
 
Join Date: May 2008
Posts: 14
Re: Gear Oil

I put Amsoil (speed shop was out of Redline) 75-90 synthetic in last weekend and I have been getting the same noise. It does sound a lot like a wheel bearing going bad, except it's only at low speeds. It's annoying. Is it damaging anything?
ericm979 is offline  
post #9 of 42 (permalink) Old 09-04-2008, 09:04 PM
Moped Rider
 
Join Date: Feb 2008
Location: Chicago
Posts: 14
Re: Gear Oil

Hate to say it, but I think the stock gear oil is better than a synthetic gear oil replacement. At least the factory gear oil doesn't make noise when turning.

I wonder if the MS 3 came with a fiction modifier from the factory?

crypt0wind is offline  
post #10 of 42 (permalink) Old 09-08-2008, 02:17 PM
Moped Rider
 
Join Date: May 2008
Posts: 14
Re: Gear Oil

I wonder if the oils we used (Valvoline and Amsoil) don't contain the friction modifier that Redline has.

Unfortunately the Amsoil site does not say if their oil has it.
ericm979 is offline  
Sponsored Links
Advertisement
 
Reply

  Mazda3 Forums : The #1 Mazda 3 Forum > Technical / Model / Performance > MazdaSpeed > MazdaSpeed3 DISI General Powertrain

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mazda3 Forums : The #1 Mazda 3 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Image Verification
Please enter the six letters or digits that appear in the image opposite.

Registration Image

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome