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#36138 10/19/2004 5:29 AM | Joined: Nov 2003 Posts: 53 Member | | Member Joined: Nov 2003 Posts: 53 | The SM420 4 speed was used through 1967; the SM465 replaced it in 1968. The SM420 was a good transmission, not quite as beefy as the 465, but plenty strong for a light truck. Along with its lower first gear, the case is a little shorter than the 465. If you change out to a later trans, be sure to get the bellhousing as most of the 465s use a larger bearing retainer.
1968 was the last year for the Rockwell transfer case; it was replaced by the NP205 in 1969. The NP205 is a much superior transfer case, and quite plentiful. You may want to strongly consider replacing the Rockwell with an NP205. If you keep your eyes open, SM465/NP205 combos show up on ebay. | | |
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