Posted by Vaughn on Friday, September 06, 2002 at 11:06AM :
In Reply to: how to tell the difference from a non syncro np420 and a syn posted by dave on Wednesday, September 04, 2002 at 11:27PM :
Can't go by the cover number, you need to look ate the tranny case number C-88221. the NP420 has two bearing caps at the bottom for the counter shaft on each side of the tranny. The spur gear has a locking plate