BW 1345 transfer case fluid
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Postmaster
Joined: Dec 2005
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BW 1345 transfer case fluid
I have a bw transfer case in a 1986 f350. I figured i would check the fluid, so I opened up the fill plug and regular oil was in it. I thought it took atf. I searched, and everything I read said atf, except my Chiltons manual says use 30wt oil. My haynes manual says use atf. Now I'm confused. Anybody understand why the contradiction between the two manuals? Thanks!
Post Fiend
Joined: Jun 2002
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From: Atlanta GA
The early transfer cases used 30w/50w oil to protect the seals, or 80w/90w, and the transfer cases were usually gear driven. Hence, the need for hypzoid (sp?) gear oil.
Most late model chain driven transfer cases use Dex II. One main reason is better fuel economy and easier shifting (both transfer cases and transmissions).
> Anybody understand why the contradiction between the two manuals?
Because they are not written by Ford and subject to more errors.
Either way, I do not think the oil is causing any harm except maybe to the MPG.
The other thing is it might be full syn. oil and better then using normal Dex II.
Most late model chain driven transfer cases use Dex II. One main reason is better fuel economy and easier shifting (both transfer cases and transmissions).
> Anybody understand why the contradiction between the two manuals?
Because they are not written by Ford and subject to more errors.
Either way, I do not think the oil is causing any harm except maybe to the MPG.
The other thing is it might be full syn. oil and better then using normal Dex II.
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Dan Robertson
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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May 25, 2017 05:13 AM
