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2015 Silverado Diff Fluid Change #4107703 05/26/16 11:25 PM
Joined: Feb 2013
Posts: 725
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Realtech214 Offline OP
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Joined: Feb 2013
Posts: 725
well I decided to do a diff fluid change on my 2015 G80 Diff in my silverado. I hand pumped out and filled with almost 3 qts of SYNpower 75W90 gear lube. Wanted to get the break in stuff out. FF was very dark but didnt smell burnt or anything, Fill plug magnet had almos nothing on it. I'll be happy back there till I get to 100K miles.



2015 Silverado Crew cab, 10K miles




2015 Silverado Crew Cab 5.3 LT 120,xxx miles
2001 Suburban LT 145,xxx miles
- - - - - -
Re: 2015 Silverado Diff Fluid Change [Re: Realtech214] #4107881 05/27/16 08:01 AM
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Posts: 3,326
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Bottom_Feeder Offline
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Since when do solid axles in modern trucks have 'break-in' lube from the factory?

Re: 2015 Silverado Diff Fluid Change [Re: Realtech214] #4107885 05/27/16 08:05 AM
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Posts: 14,349
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CT8 Offline
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I would change it again at around 40,000 miles.


2015 F150 2.7
2018 F350 6.2
Re: 2015 Silverado Diff Fluid Change [Re: Realtech214] #4107966 05/27/16 09:46 AM
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gman2304 Offline
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Good job Realtech. My 2005 G80 with 181,000 miles probably needs this service as well. I bought it used, but AFAIK the diff oil has never been changed. It's now on my 'to do' list, though I'll probably use the Mobil1 75w90.

Re: 2015 Silverado Diff Fluid Change [Re: Realtech214] #4107974 05/27/16 09:57 AM
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RISUPERCREWMAN Offline
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The Manual for my 2014 Ram 2500HD calls for diff fluid service every 20K miles.


2018 Ram 2500 HD 6.4 Hemi Crew Cab 10,600
8'Boss SuperDuty Plow
2017 Harley Davidson Milwaukee 8 Limited 10KMiles
2010 Toyota Avalon XLS 52K miles
Re: 2015 Silverado Diff Fluid Change [Re: RISUPERCREWMAN] #4108482 05/27/16 07:58 PM
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clinebarger Offline
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Originally Posted By: RISUPERCREWMAN
The Manual for my 2014 Ram 2500HD calls for diff fluid service every 20K miles.


My old '03 Dodge 2500 Diesel called for diff service every 15,000 miles under Severe Service, Which I did & still had to have the rear Ring & Pinion replaced before 100K.....Go figure, At least it was under warranty.

What gets me is, GM & Dodge use the SAME 11.5" AAM differential in their Diesel & 3500 trucks, But the GM version has a drain plug & doesn't call for fluid changes, And Dodge calls for stupid short drain intervals but have No drain plug.....


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: 2015 Silverado Diff Fluid Change [Re: Bottom_Feeder] #4109087 05/28/16 04:11 PM
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CKN Offline
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Originally Posted By: Bottom_Feeder
Since when do solid axles in modern trucks have 'break-in' lube from the factory?



They don't. I have a 2011 with the G80 and I tow frequently and changed it at 50,000. The factory fill is a synthetic.


Another case of BITOG "over maintenance".

Last edited by CKN; 05/28/16 04:12 PM.
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