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finned dif covers

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Old Mar 28, 2011 | 12:18 AM
  #16  
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Never knew the 08+ diff covers were so affordable. Nice!
 
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Old Mar 28, 2011 | 04:53 AM
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Originally Posted by william_04_x
From my reading, the finned AL rear diff covers are an improvement, and do reduce fluid temps.

I also remember a post back in the day where MK posted the finned trans pans weren't as effective, and not necessary. The trans cooler is much more efficient.
I wonder if the aluminum cover isn't also a cheaper and longer lasting alternative to the stamped steel covers, not to mention more efficient at heat transfer.
I remember the same post about the transmission pan. He gave a good technical explanation and explained all the testing they did about why the trans. pan change was a waste of money AND fluid.
 
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Old Mar 28, 2011 | 04:54 AM
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Originally Posted by LOOnatic
You can buy the finned aluminum stock 08+ rear diff cover for $50 online .
That with syn fluid is a nice upgrade on a budget
They already have 75W140 synthetic IIRC.
 
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Old Mar 28, 2011 | 07:58 AM
  #19  
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Yes they have syn and an additive if u have limited slip
I doubt the cast covers are cheaper than stamped steel? but the rust issue was probably a big factor in the change
 
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Old Mar 28, 2011 | 03:58 PM
  #20  
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Originally Posted by LOOnatic
You can buy the finned aluminum stock 08+ rear diff cover for $50 online .
That with syn fluid is a nice upgrade on a budget
Could you please provide a link for the cover.
 
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Old Mar 28, 2011 | 04:02 PM
  #21  
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Riffraff Diesel: OEM Covers
 
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Old Mar 28, 2011 | 06:30 PM
  #22  
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yes aluminum transfers heat better.

yes adding fins increases surface area and heat transfer, but with the cover being on the back side of the axle, there is limited air flowing over the fins which reduces their effect.

like someone said earlier, i bet it had to do with a maintenance issue, supplier issue, or looks overall.
 
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Old Mar 28, 2011 | 09:17 PM
  #23  
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Is it the same size diff cover on a single rear wheel vehicle as on a dully??
 
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Old Mar 28, 2011 | 10:07 PM
  #24  
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Originally Posted by rocky1074
Is it the same size diff cover on a single rear wheel vehicle as on a dully??
Nae, dually's have Dana 80's. Although I saw somewhere on here about a Trail Boss dually option or something like that.... and that truck has a alum. cover.
 
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Old Mar 29, 2011 | 04:55 AM
  #25  
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I would like to get one for my dually but I don,t want to spend $250.
 
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Old Mar 29, 2011 | 10:55 AM
  #26  
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Originally Posted by Nice Work Truck
I would like to get one for my dually but I don,t want to spend $250.

I agree 60.00 is a lot better than 250.00
 
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Old Mar 29, 2011 | 04:36 PM
  #27  
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I think to new '11 dually has a finned diff cover but I don't know if it is a Dana 80.
 
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Old Mar 29, 2011 | 04:47 PM
  #28  
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They originally had a fair amount of problems with the stamped steel pans and diff. cover rusting through in areas where road salt and other chemicals were used. This could be their way around that. Cheaper to do it at the factory than under warranty at the dealers.
 
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Old Mar 29, 2011 | 05:18 PM
  #29  
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Originally Posted by Nice Work Truck
I think to new '11 dually has a finned diff cover but I don't know if it is a Dana 80.

I guess I will have to some investigation work and see..If I find out I will post it..
 
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Old Mar 29, 2011 | 05:21 PM
  #30  
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Originally Posted by rocky1074
I guess I will have to some investigation work and see..If I find out I will post it..
Thanks.
I saw one on Trucks this past weekend.
 
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