[WorkinLonghorn]

I would call Novak in the above link and ask to talk to the NP435 specialist.

As for "granny" first gear; It depends on the differential gearing and tire size somewhat whether a 4.56 gear feels like a "granny". With 3.07 and 31"(or larger) tires one could easily use it as a normal 1st. Mine has 3.73 rear and I usually start in 2nd unless I'm loaded down or on an incline. So it is sort of a granny in my case. But I can still go 0-26 MPH in 1st if I want to. -BA

Eric Johnson, that's cool that you have the original build sheet. Mine is long gone and there was never even a SPID in the glove box.