Hi folks, a lot of confusion on some posts as to whether or not second gear in US versions of the M37, M43 and their variants are synchro'd. They are not. The early 88 series in either military or civilian version were not synchro'd in second gear. The military and civilian versions of the NP 420 are not synchro'd in second gear either. I have heard some rumor that there may have been a version of thew NP 420 that is synchro'd in second but I have yet to see any transmission of this nature or have seen any parts or reference to a version where there is a synchro set up for second gearfrom either a factory source or aftermarket. I would dearly love to see one, or even have the chance to get one. To calm the flames that are sure to ensue, please post a pic of the internals of this phantom transmission and include a picture of the outside rear portion of the transmission case with lower cluster gear bearing retainer in place. many early NP 435's were confused with NP 420's and this may be the cause for the confusion. Thanks.
Oh by the way, to date 29 M37's and M43's restored, countless others worked on. 44 M35's and all the variants. Two 5 tons, one a tractor and the other a dump, rebuilding both a transmission and transfer in these is the main reason I quit doing them. The Loveland ski resort still has the dump I sold them many years ago as I understand. Two M715's, (who designed that engine?). More trailers than I care to remember including 21 inflatable chemical/biological trailers with all the little goodies on these neat set ups. Too many to remember aluminum bridge pontoon boats. Oh yeah, two M656 8X8 cargo trucks, they were a blast.