Differential fluid weights?

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Jan 7, 2008 | 02:55 AM

Acewelder99

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From: Glen Burnie

Differential fluid weights?

I have a 97 f-250 4x4 7.3l manual. I want to change my front and rear diff fluids but I dont know what weight gear oil I should use.

Jan 7, 2008 | 05:25 AM

Cuda_jim

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From: MICHIGAN

75w140 synthetic in the rear diff, add friction modifier even though the fluid comes with it if you have limited slip.

80w90 in the front.

Jan 7, 2008 | 05:28 AM

Acewelder99

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From: Glen Burnie

Thanks for the info. Has anyone used the lucas gear oil? I love all their other products

Jan 7, 2008 | 09:37 AM

Talyn

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From: Ashland City, TN

at 24 dollars a quart. i think i'd use the valvo Synth 75w140 for 6 a qt.

Jan 7, 2008 | 02:21 PM

Cuda_jim

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From: MICHIGAN

Quote:

Originally Posted by Acewelder99

Thanks for the info. Has anyone used the lucas gear oil? I love all their other products

I used to think that too...until I read/saw this
http://www.bobistheoilguy.com/images/lucas/lucas.htm

Lucas fuel injector cleaned is good stuff though, but I've not used it in our diesels...don't know?

Sep 2, 2010 | 10:20 AM

redone1

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From: Lizton, IN

how many quarts does the reaf diff. take?

Sep 2, 2010 | 11:26 AM

pjwoolw

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From: San Ramon Ca.

Three to three and a half quarts so you will need four.

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