Posted by Mike L on Thursday, March 15, 2007 at 18:36:16 :
In Reply to: NP420 vs M37 transmission posted by scott in georgetown on Thursday, March 15, 2007 at 17:58:29 :
The M37B1 was equipped with the NP420. The original M37 transmission and the NP420 are externally identical as I understand. The difference was internal and I forget what exactly it is (someone here will likely know, if not, check over on the G741.org site). I know the synchro gears are different for one thing.
Parts can be found at Vintage Power Wagon, AB Linn (ablinn@cbiinternet.com), or Sid Beck (361-573-3276). I'm sure there are others if you check around.