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Old 04-09-2017, 05:13 PM   #1
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blaskat's Avatar
Join Date: Apr 2017
Location: Portsmouth, NH
Posts: 3
Rockwell T221

Can anyone explain the differences between the T221 N3, M6, and M7?
I need to replace mine, but can't seem to figure out exactly which I need.
Found an N3 but it isnt an exact match and the plate that shows the specs is missing from my original. Just don't want to make the same mistake twice. Oh, its out of a '62 Chevy K20.
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rockwell, t221, transfer case

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