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question of value for rear diff experts

2179 Views 6 Replies 5 Participants Last post by  136679ss
got a little surprise this past week. purchased what were supposed to be a new unused 3.55 richmond set for a 12 bolt chevy. when I opened the box the gearset appears to be unused, but with 1967 dated GM 3.55 gears. part numbers pinion:3853008 dated 8/67 11-39-GM, and ring : GM 3853010 11:39 dated 9/67. Now I know what a new rich gearset goes for, but these appear to be never used NOS GM 3.55's. I still have every intention of installing them in my velle after I come up with a posi for it, but am just a little curious what they might be worth. Any input would be appreciated, and thanks in advance Jason.
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If they are a mated set I would say LOTS. More than any new aftermarket gears for sure. 3.55's aren't available from any aftermarket mfr and these are new GM. It doesn't get any better than that. Couple that with the fact that 3.55 was the std ratio in many Chevy muscle cars and the high demand for that ratio today. If not a mated set they are worth next to nothing IMO. That's the big question, how can he tell if they're a mated set? If you go by the date on each it doesn't look good.
You're right. At least they're listed in the Summit catalog. I didn't realize they're now available.
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