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Re: ALL the 12-bolt pinion seal info!
I have not heard of a Eaton HO35 before, but then again I haven't checked into all the different Eaton differentials. The 1/2 ton Eaton differential used from '55 thru '62, I have always known as the Eaton HO32. The 3/4 ton trucks used the Eaton HO52, and the 1 tons the Eaton HO72. Both were used from the early to mid 50's thru '72.
The number designation that Eaton used on these differentials, indicate the rated GVW for that differential. The HO32, had a GVW rating of 3200 lbs, the HO52 had a GVW rating of 5200 lbs, the HO72, 7200 lbs. So maybe the HO35 was a upgraded version of the HO32?
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