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post #1 of 23 Old 10-08-2012, 08:26 AM Thread Starter
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Gear Oil???

Ok guys, Im thinking of changing my gear oil (front and rear)... Thinking synthetic with Motorcraft Limited Slip additive. Any suggestions to what I sould get? And what Weight


Thank you in advance!

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post #2 of 23 Old 10-08-2012, 08:32 AM
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I am getting close to doing the same. Most synthetics already have the Limited-Slip additive in it and do not need the Motorcraft stuff. I am thinking of doing Amsoil, Mobil 1 or Valvoline in mine and they all include the limited-slip additive. I'd stick with the 75w-140 for the rear and the 80w-90 in the front but that's just me.

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post #3 of 23 Old 10-08-2012, 08:33 AM
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I just got the oil and addative at my local dealership
the additive is 5.30
75w140 gear oil is 24.23 per quart--- 3 are recommended

I got it while I bought a new pinion seal and nut

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post #4 of 23 Old 10-08-2012, 09:52 AM
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You can also get them online from Summit, including the front without the friction modifier in it. Redline sells the fluid without it (NS).

I also put down the amount needed, but hopefully someone will sanity check it for me if I come up short.

Front - 80w/90 - 3 qt - $14.95 each, $44.85 total - Red Line Synthetic Oil 58304 - Red Line Synthetic Gear Oil - Overview - SummitRacing.com

Rear - 75w/140 - 4 qt - $15.95 each, $63.80 total - Red Line Synthetic Oil 57914 - Red Line Synthetic Gear Oil - Overview - SummitRacing.com

Came out to $108.65, including shipping. Just an option.



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post #5 of 23 Old 10-08-2012, 10:08 AM
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Can you use Ford's friction modifier with Redline's 75w140?

And can you get away with using 3 quarts of gear oil or better to get 4 quarts?? I just brough up an old thread and missed this one, my bad lol

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post #6 of 23 Old 10-08-2012, 10:08 AM
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I also ready I think by S. Carlson that you can use the 75w140 in the front just with NO friction modifier. Can anyone confirm?

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #7 of 23 Old 10-08-2012, 10:13 AM Thread Starter
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Quote:
Originally Posted by darsey715 View Post
I also ready I think by S. Carlson that you can use the 75w140 in the front just with NO friction modifier. Can anyone confirm?

I think so but what I am running into is most if not all SYN fluids have Friction Additive already in them...

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post #8 of 23 Old 10-08-2012, 10:16 AM Thread Starter
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So far my plan is to get Valvoline Synthetic 75w-140 for the rear (4 @ 12.99) , and 75w-90 for the front. (3 @ 9.99) at Autozone.

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Studded and Deleted
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Warren Comp Tranny w/ PI TC
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post #9 of 23 Old 10-08-2012, 10:19 AM
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Quote:
Originally Posted by Six0~Stroker View Post
I think so but what I am running into is most if not all SYN fluids have Friction Additive already in them...
What about this stuff

Red Line Synthetic Oil 57105 - Red Line Synthetic Gear Oil - Overview - SummitRacing.com

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #10 of 23 Old 10-08-2012, 10:24 AM
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What about for cold temperatures? Cuz im planning on being up in tahoe this winter, getting down to 10 or 15degrees. Is 75w140 and 75w90 still recommended for cold weather? Thanks.

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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