Posted by John S on Tuesday, December 02, 2003 at 10:10PM :
In Reply to: difference between PW & M37 NP420? posted by Don in Missouri on Tuesday, December 02, 2003 at 3:31PM :
There are different models of the np420. Late model transmissions will not bolt to early bellhousings. The mounting bolt pattern is different. A easy way to tell is the late model mounting holes are parallel to each other. The early holes are on a angle.