80W-90 GL-5 Diff Fluid

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May 13, 2002 | 12:10 PM

Pastmaster

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From: Lee's Summit MO

80W-90 GL-5 Diff Fluid

Guys,

I'm going to be changing the rear fluid on a 97 F-250 at work with 4:10 open differential.

I allready bought the fluid, but it states it's for Limited Slip differentials. Can this be used on open diff too? Do these trucks use a gasket or RTV?

'93 F-150 loaded and modified!
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May 13, 2002 | 01:20 PM

wayne_j

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From: cedar rapids usa

80W-90 GL-5 Diff Fluid

yep you'll be fine. what the additive is is a special fricion fighter for the clutch plates in a limited slip diff. but it works great in the open diff too. as far as the RTV i personally think it works better then the paper gasket. it's the only thing i use unless its a high heat or high pressure application. my whole eninge except for the intake and exhuast ports and the heads is rtv and no leaks.

May 13, 2002 | 04:47 PM

Pastmaster

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From: Lee's Summit MO

80W-90 GL-5 Diff Fluid

Thanks Wayne_J

The WHOLE engine is RTV? Do you use it on transmission pans?

'93 F-150 loaded and modified!
Check my Gallery

May 16, 2002 | 12:16 AM

proford460

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From: Comstock

80W-90 GL-5 Diff Fluid

use synthetic rear end oil good for 100k rtv the cover

May 17, 2002 | 08:01 PM

waldreps

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From: MN

80W-90 GL-5 Diff Fluid

I want to use Mobil 1 synthetic gear oil in my 8.8 differential in my 1994 F150 302 4x4. Do I need to add a bottle of friction modifier with the synthetic fluid??