NV4500 1 3/8 input

[GLHS]

If I find a junk NV 5600 with a 1 3/8 input shaft, can I swap it into a 2001.5 NV 4500?
At what hp level do the 1 1/4 inputs break?

[bgilbert]

I would say no. The big input shaft for the 4500 is a billet piece, not from the 6 speed. The small shaft can break at stock hp levels, just depends on how stupid the driver wants to get while on the pavement.

[KTA]

No but you could take the 1 3/8 from a late nv5600 and swap it into an early 1 1/4 nv5600. The 5600 is a huge pain to work on though so I would just shell out the $700 or so for the Nv4500 big shaft and be done with it. My stock 1 1/4 getrag shaft6 is still holding but I drive it like its made of glass.

[GLHS]

OK, next question. What else do I need to do to make a 4500 hold up to drag strip launches. I've been looking at the "silver and "gold" series shafts on QUAD 4x4s website. Is this needed?
Brian; Even if you do drive it easy it sounds like it still holds up very well with all that power. The Getrag is underrated!

[KTA]

It can and does hold the power fine. The getrag actually has BIGGER gears in it than the nv4500, but the 4500 has lot better bearings, and that is where I see the getrags failing. I would get ahold of Jeff Prince and see what he says on the NV4500. He is the fastets most abusive nv4500 racer I know of and did it for several runs so perhaps he can give you some insight.

[GLHS]

Would you happen to know the website or number for him?
I have found stuff about him but, no number.

[KTA]

I found this email for jeff on enterprise engine. princeperfdiesel@aol.com