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Gear Oil Or 30 Wt Oil For Transmission?


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#1 DougN OFFLINE  

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Posted May 09, 2013 - 09:19 PM

Hello everyone. I bought a 1956 David Bradley earlier in the spring and only recently have had a chance to do anything with it. My question is should I put 90 wt gear oil in the transmission or just 30 wt motor oil? The online manual mentions using #30 oil. Just want to make sure since I'm used to using gear oil in more modern equipment.

 

Thanks,

Doug



#2 MH81 ONLINE  

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Posted May 09, 2013 - 09:24 PM

I have switched over to gear oil, 80w-90 is what I've been using on all my tractors. If you're not planning on running in low temps, I don't see a down side.
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#3 olcowhand ONLINE  

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Posted May 09, 2013 - 09:31 PM

I don't see an issue with 80w-90 even in cold temps.  Yes it gets thick, but it's not like 140w and will still flow.  If it didn't, farm equipment would fail.  After all, our vehicle differentials takes off up the road full speed in subzero weather with 80w-90.


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#4 DougN OFFLINE  

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Posted May 09, 2013 - 09:44 PM

Thanks guys for the replies. That's what I was thinking but I wasn't sure. 






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