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Old 09-08-2014, 11:57 PM   #1
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Default Where can I buy 3,000,000 CST diff oil

Looking to get thicker oil for the front diff, and can't seem to find 3 million cst diff oil that I'm looking for.....any help out there?

Diff currently holds 2.5 million cst but was told I should be running something heavier by a local racer. Don't want to run wax ear plugs so please save that advice for someone else.

FYI, I'll settle for 2.5 million diff oil if that's all I can get, but prefer using heavier oil.

Thank you in advance.
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Old 09-09-2014, 12:09 AM   #2
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Never seen or heard of 3 million. There are some silicon putties though I think. I'll see if I can find it.

edit: http://www.reflexracing.net/RSD-Sili...ty_p_2204.html
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Old 09-09-2014, 12:10 AM   #3
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http://www.reflexracing.net/RSD-Sili...ty_p_2204.html
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Old 09-09-2014, 12:18 AM   #4
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Damn, I just got an order from them, guess I should have asked this question a week ago. ......

Can anyone estimate the CST rating of this RSD putty without adding oil?


Thanks for the help!!!
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Old 09-09-2014, 08:16 AM   #5
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With that density, you might just as well glue the diff up. From 500k up, its already very locked.
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Old 09-09-2014, 08:30 AM   #6
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There is a big difference between 2.5 mil and a spool.
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Old 09-10-2014, 12:10 AM   #7
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Quote:
Originally Posted by Odin544 View Post
There is a big difference between 2.5 mil and a spool.
Yes! Also if you compare a diff with puty and spool. A diff with puty can be so hard you can't move it with hands but on the track you can feel the difference compared to spool big time
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Old 09-10-2014, 10:13 AM   #8
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Quote:
Originally Posted by OttoKrosse View Post
Looking to get thicker oil for the front diff, and can't seem to find 3 million cst diff oil that I'm looking for.....any help out there?

Diff currently holds 2.5 million cst but was told I should be running something heavier by a local racer. Don't want to run wax ear plugs so please save that advice for someone else.

FYI, I'll settle for 2.5 million diff oil if that's all I can get, but prefer using heavier oil.

Thank you in advance.
The amount of fluid in the diff will affect how it feels. A completely full diff with 2.5 million will feel very stiff so be sure that it is filled completely or with as little air as possible.

It will never feel as heavy as silicone ear plugs or putty, but it does not have to be that tight.

I have never seen silicone fluid heavier than 2.5 million.
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Old 09-10-2014, 10:29 AM   #9
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This will help in a big way to get rid of any air you have in your diff. With oil that thick the air bubbles can sit in between the gears. Speeds up the process of building x10
http://www.tqrcracing.com/shop/produ....asp?p_id=1597

I use it a couple times when I'm building a diff and removing air. I turn the gears a little between pumps.
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Old 09-10-2014, 11:01 AM   #10
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Even if you are able to fill your diff completely without the smallest buble inside, you will find air inside having used it for a certain time.

The reason for that is that when you operate the diff it will heat up and the oil will expand resulting in a leaking. When it cools down again it will suck air in. thats physiks nobody can get arround.

The oil leaking out of the diff will find a way your outer diff gears and cause them to consume power. by moving the sticking oil arround.

For that reason I do not fill them completely.
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Old 09-10-2014, 12:04 PM   #11
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Quote:
Originally Posted by Rick Hohwart View Post
The amount of fluid in the diff will affect how it feels. A completely full diff with 2.5 million will feel very stiff so be sure that it is filled completely or with as little air as possible.

It will never feel as heavy as silicone ear plugs or putty, but it does not have to be that tight.

I have never seen silicone fluid heavier than 2.5 million.

Thank you Rick, and thanks to everyone else that provided advice. It's great to have a community that shares their years of experience!! ....
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Old 09-10-2014, 01:03 PM   #12
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Best way to build a diff with thick fluid IMO. Fluid first, then insert the gears.

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
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Old 09-11-2014, 02:00 PM   #13
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Quote:
Originally Posted by Geberit View Post
Yes! Also if you compare a diff with puty and spool. A diff with puty can be so hard you can't move it with hands but on the track you can feel the difference compared to spool big time
I am new on the sport
Could you please tell the difference between using spool and super tight diff?
Thank you
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