Rear Differential Fluid? - Ford Powerstroke Diesel Forum
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post #1 of 28 Old 08-18-2013, 09:03 PM Thread Starter
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Rear Differential Fluid?

I have an 01 F-350 7.3 cclb with electronic auto trans. It is a limited slip, but I am not sure of the type of axle. How can I tell? What is best fluid and do I have to add limited slip stuff to it? Thanks.
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post #2 of 28 Old 08-18-2013, 09:52 PM
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You axle is a 10.5"


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post #3 of 28 Old 08-18-2013, 09:53 PM
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should be 75-140 synthetic or if you never tow 75-90 synthetic but i suggest the 75-140


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post #4 of 28 Old 08-18-2013, 10:47 PM
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Its a Sterling 10.50...

And I would use a 75-140 as well...

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post #5 of 28 Old 08-18-2013, 11:05 PM Thread Starter
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Thanks guys. Are there any cheaper alternatives to the purple stuff w/ the anti slip stuff?
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post #6 of 28 Old 08-18-2013, 11:25 PM
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Napa... Orileys...

Just add the anti slip additive.

01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
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post #7 of 28 Old 08-19-2013, 01:45 AM
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i used valvoline synthetic 75w-140. napa had it, kinda pricey at 12 bucks a quart...

and it came with additive already in it. so i didnt need to add any.
limited slip works like it should.

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post #8 of 28 Old 08-19-2013, 05:32 AM
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This may be a dumb question but do most or all superduties have a limited slip? Or was it an option and would the vin indicate it? Kelly

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post #9 of 28 Old 08-19-2013, 08:43 AM Thread Starter
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I know it was an option for my 01 f350 cclb.
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post #10 of 28 Old 08-19-2013, 06:03 PM
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Quote:
Originally Posted by 027.3 View Post
This may be a dumb question but do most or all superduties have a limited slip? Or was it an option and would the vin indicate it? Kelly
It was an option try this vin decoder VIN Decoder | fleet.ford.com

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