According to Randy's Ring and Pinion, the '92 will be 35 spline and the '95 will be 32 spline.
I believe any dually will be a D80 regardless of tranny. May be wrong on that, though.
I would still suggest getting a detailed pic of the tags. Everything you need will be there.
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Scott
2003 Avalanche Z71
Common sense is like deodorant. The people that need it most never use it.
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