Np 242 Vs Np 231

[Rockfrog]

A 249 chain and sprocket with front out put shaft will give you a 1.25"chain and 32 spline front out put. The same parts from an np241dhd will push the chain to 1.5". I'm going with the 1.5"chain and 32 spline front output on mine for the MJ. Just because I already have the parys in the garage.

[The_outoors]

I am also think between 231 and 242. I was wondering if u have to have different axle gear ratio?

[The_outoors]

I am also think between 231 and 242. I was wondering if u have to have different axle gear ratio?

[88whitemanche]

No it doesn't matter about gear ratio...

The difference between one and the other is that the 231 is a part time 4x4 transfer case and the 242 can be used as a full time 4x4

 

Edit- didn't read what you meant...

These guys below are correct....

[Wiggilez]

How ever your axle do need to have the same ratio in them, or else you're in for a bumpy ride.

[Crash]

Well, any awd, or 4wd vehicle needs matching ratio axles front and rear.

[The_outoors]

Okay thanks that's what I need to know

[mikekaz1]

the second number in NP designations is the strength code. Low->high / weak->strong So in fact a 242 IS stronger then a 231.

[mikekaz1]

 

There are things you can do to the 242 as well. Using parts from a NV242 DHD (used in diesel Dodges) or the version they used Humvees behind 6.5L turbo diesels can give you the strength (wider chain, etc) WJs with 242 replaced the open carrier with a Torsen limited slip unit.

I was not aware of this....

 

May have to take a second look at the 242.

Not quite. WJ's use wheel speed sensors not t case sensor. So there's no port cast out. It may be possible to swap cone but Idk. And a 242 is a 242. Just that. All years are essentially the same. The one your thinking of is a 247/249. Both of which don't have a 2wd option. Only 4all-N-4lo