Questions About Changing Diff Fluid

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Feb 2, 2003 | 05:30 PM

#16

tlea7

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Joined: Dec 2002

Posts: 171

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From: Warwick, Rhode Island

Re:Questions About Changing Diff Fluid

I believe the 2500 manual trans have the 80 and the auto trans have the 70 Tim

Feb 2, 2003 | 11:33 PM

#17

TBGH

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Joined: Jan 2003

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From: Elm Creek MB Canada

Re:Questions About Changing Diff Fluid

Manual transmission trucks have a Dana 80. If you are towing, DC recommends a 85 - 140W synthetic. The service manual calls for 10 oz. of friction modifer. There are no gaskets, use silicone. John

Feb 3, 2003 | 06:21 PM

#18

AFMSgt

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Joined: Mar 2002

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Re:Questions About Changing Diff Fluid

My owners manual says to use 75-140 - any of you tech heads know the difference between 10 points on the viscosity index?

Feb 3, 2003 | 08:23 PM

#19

scottrod

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Joined: Jan 2002

Posts: 473

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From: Big Sky Country

Re:Questions About Changing Diff Fluid

My factory installed 70 cover was put on with RTV. Now it's o-ringed ;D

Feb 4, 2003 | 01:58 PM

#20

Ramflasher

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Joined: Feb 2003

Posts: 248

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From: Pacific Northwest

Re:Questions About Changing Diff Fluid

Local NAPA stores do have gaskets...nice cork ones. They have them for the Dana 60 and 70, and the 80. If they don't list them, look under ford...they have the same axles and gaskets, I believe. If ya use the maghytek, don't forget to oil the o-ring prior to installation!