The SM465 is a heavy duty, granny, 4 speed transmission used in Chevy and GM trucks. The large ribbed cast iron case makes it easy to identify.
It is an excellent 4 speed to swap into a Jeep with a Chevy engine. The SM465 has an unusual large input bearing retainer, it does not use the standard GM size. It is normally best to buy a matching bell housing with the transmission.
Rumor is, the late 70s to 81 GMC trucks were available with a Oldsmobile 5.7L diesel and SM465. The bell housing used in this truck would be useful to mate an SM465 with a Buick engine since this engine should have the BOP/BOC pattern. The other option to mate a Buick or Caddy engine to an SM465 is get a BOP/BOC bell housing machined out. This adds to the cost and who knows if it would compromise the strength of the bell housing.
Transmission 1st 2nd 3rd 4th 5th Rev
SM465 6.55 3.58 1.57 1.00 NA
The NP205 transfer case is a heavy duty gear driven transfer case in a cast iron case. The low range is 1.98:1 and it was used from 1971 until 1980 in Blazers and full size pickups. The transfer case has a poor low range, but may be useful in situations where strength is more important than crawl ratio.
Some versions of the NP205 are drivers drop and some versions are passenger drop. There are variations in input spline count.
NP205
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