Heavy Duty Transfer Case

[qboy]

I want to replace my NP203 transfer case with an AWD one. It's got to be just a one speed and able to handle the power of a heavily built up BBC with over 700 hp. Anyone know of one that will work?

[Ranger]

I thought a 203 was AWD? For that application I'd get a Turbo 400 2wd tranny and if you need 4wd just run a jackshaft setup (weld in a new crossmember holding the front shaft up and run a chain around the rear front yoke, instant 4WD).

[qboy]

I thought a 203 was AWD? For that application I'd get a Turbo 400 2wd tranny and if you need 4wd just run a jackshaft setup (weld in a new crossmember holding the front shaft up and run a chain around the rear front yoke, instant 4WD).

 

 

An NP203 isn't an AWD transfer case. It acts like 2wd (worst front or worst rear) or if locked then it's a 4wd transfer case which won't work on the street.

 

What I need is a one speed transfer case with clutches like an Eaton Posi or a viscous one. Problem is that it will need to stand up to some high horsepower.

[Ranger]

Look at gear driven transfer cases then, they will take a lot of abuse...I think in a NP it's the 205.

[qboy]

Look at gear driven transfer cases then, they will take a lot of abuse...I think in a NP it's the 205.

 

 

I know the NP205 is super strong. I'll check that one out. I just have to be sure I can drive with it engaged, hooking the front to the rear at all times. If it's a typical 4wheel drive transfer case, then it will bind when cornering on the street.

[Ranger]

You should be able to convert it to part time if you run a doubler setup, where you run a second transfer case and that will prevent power from going to the front wheels while giving you a much lower gearing.

[Genuinefine409]

NVG 149 is from the Denali's, don't know how much power they can handle though. BW 4472, I think, was used in the Cyclones with the 4.3 turbo, again, not sure about how much power they will take but I have seen one run 10.0's on stock drivetrain.