Billut

Hello everyone;
My W350 is a srw converted to drw, and an auto converted to nv4500. For a while I had a gv under over that ended up being more trouble than I needed it to be. So I yanked it out.
I am putting a shaft from the transfer case to the diff and wonder if I could go with a single piece driveshaft of 4" instead of a two piece with hanger bearing.
Any thoughts?

PapeCAT

I think 60" is about the longest single piece 4" shaft that spicer recommends, but let me see if I can find the chart online somewhere to be sure.

edit: check out page 12 here http://www2.dana.com/pdf/DSAG-0200.pdf

It says that you can go up to 70 inches in 4" (which may or may not be long enough for your application) but that is only at 3000 shaft rpm. at 4000 shaft rpm 60" is the longest you can go. Assuming you have OD and depending on your rear r/p ratio might want to stay around 60" max for single piece driveline, but if up to 70" will actually be long enough, go for it.

For the nv4500 with .73 OD - at 2600 engine RPM you're at 3561 D/s rpm. And hauling the mail to boot. so I'd think you were safe with 70" with the 4".

Billut

PapeCAT, thanks for the info. Based on the Dana document you referred to, would you suggest a 1710 or 1760 tube?

PapeCAT

I prefer the 4" 1760 and I think that was what came stock in the 1989-1991.0 727 auto trucks.

Billut

Thanks again for your information