Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

GEAR OIL

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Old Oct 7, 2008 | 10:44 AM
  #1  
GTRW3T's Avatar
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From: MIDDLESEX COUNTY
Default GEAR OIL

HEY EVERYONE..
IM GETTING READY TO CHANGE ALL MY DIFF FLUIDS AN I WAS WONDERING WHAT WOULD BE THE BEST GEAR OIL TO BUT BACK INTO THEM.. ANY ONE HAVE ANY SUGESTIONS??
 
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Old Oct 7, 2008 | 11:23 AM
  #2  
2500HeavyDuty's Avatar
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i put amsoil with a deep pan on the rear, and amsoil on the front
 
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Old Oct 7, 2008 | 07:13 PM
  #3  
KuNtRy BoY's Avatar
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From: Amarillo, TX
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Ive been running Lucas Synthetic in mine havent had a problem.
 
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Old Oct 7, 2008 | 08:19 PM
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Heath's Avatar
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Here's a good read:
https://www.amsoil.com/lit/g2457.pdf
 
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Old Oct 7, 2008 | 11:57 PM
  #5  
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Originally Posted by 2500HeavyDuty
i put amsoil with a deep pan on the rear, and amsoil on the front
 
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Old Oct 8, 2008 | 10:48 AM
  #6  
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From: Mason City, IA
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When I had mine changed this spring I had the GL-5 put back in nothing fancy. Can't afford to put anything fancy in it yet. I believe my transfer case has autotrax even though its not an autotrax case(was told it wont hurt it by the dealer).
 
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Old Oct 8, 2008 | 12:56 PM
  #7  
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thanks yawl.
 
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Old Oct 8, 2008 | 01:59 PM
  #8  
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Don't bother with synthetic crap... I worked for Dana for years in our test lab. How many failures have I seen caused by poor oil? NONE. Now, if the oil is contaminated, its a different story. I just did mine and put regular old 85W90 back in, just the Napa stuff, but I don't ever worry about it. Its a little different if you have a LSD, because you need a FM, but without one it doesn't matter.
 
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