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  #1  
Old October 19th, 2008, 08:47 AM
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Question Red Line Gear Oil...

Need help on what weight to use for transmission. Can someone here please help?

RedLine Gear OIl...


75W90
SuperLight Gear Oil
75W140
80W140
75W90 NS
75W140NS
LightWeight Gear Oil
Limited Slip Friction Modifier
V-Twin Primary Case Oil


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  #2  
Old October 19th, 2008, 09:02 AM
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Mtl.

http://www.defendersource.com/forum/...ht=Redline+MTL


http://www.defendersource.com/forum/...&highlight=MTL
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  #3  
Old October 19th, 2008, 10:05 AM
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Phillip,

Straight MTL?

Follow-up Post:

Got it...

And for others who would like to know it's 70W80 GL-4 Gear Oil (SAE 5W30/10W30 engine oil viscosity).
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  #4  
Old October 19th, 2008, 11:45 AM
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Straight MTL, do you have an AA yellow ST?
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  #5  
Old January 1st, 2009, 01:18 PM
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Question

Phillip,

Is this the MTL oil you use in your truck?

http://www.jegs.com/i/Red+Line+Oil/816/50204/10002/-1#

Red Line oil #816-50204
Synthetic Manual Transmission Lubricants
70W80 GL-4

Cheers...
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  #6  
Old January 1st, 2009, 07:28 PM
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Yup.
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  #7  
Old January 1st, 2009, 09:03 PM
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I bought soome from a vendor on ebay for $8 a quart. MTL stands for Manual Transmission Lube and its great in most any manual tranny.
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  #8  
Old January 1st, 2009, 09:20 PM
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I used to use the GM synthetic synchromesh oil in my 90, worked great and was readily available from any dealer. Cost a fortune, though.
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  #9  
Old January 2nd, 2009, 03:42 PM
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  #10  
Old January 2nd, 2009, 07:10 PM
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I think 3, I usually buy four and have a little left over for keeping it "topped up".
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  #11  
Old January 2nd, 2009, 09:50 PM
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Quote:
Originally Posted by rover4x4
I think 3, I usually buy four and have a little left over for keeping it "topped up".
Thanks,,, I was thinking 3 but I'll get 4. I finally found a supplier for Redline products here in Houston( http://www.proamauto.com/page13e.htm ). It's hard to believe that I could only find one vendor in the 4th largest city in the US and I'm glad I did.. They carry all the Red Line products and have it all in stock.. and a lot of other good stuff...
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  #12  
Old January 3rd, 2009, 01:32 PM
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How well does this fluid deal with extreme heat?
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  #13  
Old January 5th, 2009, 09:18 AM
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Quote:
Originally Posted by Buckon37s
How well does this fluid deal with extreme heat?

From RedLine's Web Site:

'Red Line's motor oils and gear oils use superior ester base stocks that provide extreme stability at high temperatures and superior film strength at lower viscosities..'
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Old January 5th, 2009, 09:51 PM
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Quote:
Originally Posted by jeepeytr
From RedLine's Web Site:

'Red Line's motor oils and gear oils use superior ester base stocks that provide extreme stability at high temperatures and superior film strength at lower viscosities..'
Thanks, but I was thinking about the MTL.
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  #15  
Old January 6th, 2009, 08:50 AM
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WHat are you currently using in the extreme heat?
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  #16  
Old January 6th, 2009, 09:00 AM
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Quote:
Originally Posted by Buckon37s
Thanks, but I was thinking about the MTL.
MTL is a Gear Oil , 70w80 GL-4 rated. Maybe I'm missing something..
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  #17  
Old October 28th, 2009, 11:14 AM
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Should I use Red Line MTL for the Differentials and Transfer case as well or is there a more appropriate Red Line Gear oil to use for those?
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  #18  
Old October 28th, 2009, 12:14 PM
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Quote:
Originally Posted by Manimal
Should I use Red Line MTL for the Differentials and Transfer case as well or is there a more appropriate Red Line Gear oil to use for those?
NO, you SHOULD NOT use MTL in the transfer case and differentials. MTL is a GL4 rated gear oil, you need a GL-5 rated gearoil in the transfer case and differentials. Use Redline 75W90 to go by the book.

For what it's worth, I ran Redline's 75W140 in my Discovery and Defender diffs and transfer case, but I'm going to switch the Defender over to their Heavy Weight ShockProof in the spring..
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  #19  
Old October 28th, 2009, 01:19 PM
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Thanks Scott. I didn't think so, which is why I asked. I was going to buy the 75W90 but what stopped me was this quote from their site: "This product is not designed for use in most manual transmissions or tranaxles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems"

That just means, don't use it for the gearbox, right?

What is the difference between the 75W90 and the 75W90NS?

And was there any difference for you using the 75W140 or the shockproof kind?
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  #20  
Old October 28th, 2009, 01:45 PM
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GL4 is fine for transfer case, diffs, swivel housings and hubs, provided it's formulated for them, which the MTL is not.
The older GL5 formulations would in fact attack brass/bronze components but I've read, but not confirmed, that the newer formulations of GL5 don't do that. I used 75w140 GL4 for years, until I couldn't get it anymore.
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