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Difference between HO 33 and HO35 rear differential?

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10-29-2025, 11:16 AM	#1
mike16 Senior Member Join Date: Dec 2009 Location: bisbee, arizona Posts: 1,609	Difference between HO 33 and HO35 rear differential? I am trying to buy a pinion seal for my truck It is a 72 c10 longbed fleetside with a 307 and an SM 465. It has coil rear suspension Parts vendors ask me if it's an HO 33 or an HO 35. What's the difference? How can I determine which one I have so I can buy the correct pinion seal. Thank you

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