Lanny Dale· Registered
Discussion Starter · #1 ·
I have a recently bought 69 Malibu driver with a TH 400 and a 12 bolt RE. I assume this isn't original because its a Malibu with a 350. In trying to identify the RE, I found the number on the rh side axle tube that starts with the letters CN. Both my reference books tell me this is a '65, '66 or '67 - 3.31:1 non posi, which irked me right away because I already knew that the 68 and 69 RE's are about 1 inch wider. I also have a bare 12 bolt housing that is identified by KK which is listed as a 4.10:1 posi for a 68 or 69. My confusion is that both RE's are the same width at 54.5" flange to flange. To add to this I also have a 12 bolt posi which is in a project 67 SS convertible with 396 4 spd. I cannot read the number on that one because its quite rough with surface rust. I measured that RE and it is 53.5" flange to flange which tells me I'm measuring correctly. How can this "CN" identifier measure out to 54.5"? Did US and Canadian made RE's use the same codes? My 69 Malibu is originally from the US.