242 offroading

[housemaster0630]

does anyone have any videos of a cherokee with the nv242 transfercase?

cuz every video i find always has the jeep trying to climb a hill or rock and one tire spinning

and i know the 242 would lock them all together

[woody]

The 242 in low range operates the same as a 231... the front and rear output shafts are 'locked together' (these are also locked together in the 4-high part-time mode)

The 242 has a center differential that allows some slip between the front & rear, that allows it to be operated on dry roads. This is the 4-high full-time mode...

You may be thinking of the "quadra-drive" axle differentials in the WJ Grands?

[housemaster0630]

they must all be using the 231 in high range then

[woody]

In high range, it would act the same, just without the reduction gearing.

If these folks in the videos are only getting one wheel spinning, they are either in 2WD with an open diff, 2wd with broken junk, or in 4WD with really broken junk...

Did the audio sound like someone was running a clothes dryer with 20# of scrap metal inside? :viking:

[NW-ZJ-SCOTT]

are you thinking all 4 wheels should be spinning at the same time?

[SeansBlueXJ]

it sounds like he expects the 242 to act like front and rear lockers... maybe:dunno:

[igotanxj]

Thats what it sounds like. A 231 only locks the front and rear output shafts of the transfer case together. It does this in 4lo and 4hi, locking the axle shafts together is a whole nother job for a differential lock in the axles. A 242 does the exact same thing as a 231 in part time 4wd, but it has an extra option for full time 4wd wehre theres a center diff in the TC.

[kdailey4315]

it sounds like he expects the 242 to act like front and rear lockers... maybe:dunno:

X2. A 242 allows you to drive on dry roads in 4X4. It does the exact opposite of what you think it is doing. The 242 is allowing the wheels to spin independently of each other.

[Skully]

X2. A 242 allows you to drive on dry roads in 4X4. It does the exact opposite of what you think it is doing. The 242 is allowing the wheels to spin independently of each other.
x3 but the way you worded it would confuse him even more. It sounds like he is confusing what a transfer case does and what the axle differential does.

As they mention above about the difference between 231 & a 242, 242 just allows you to drive everywhere in 4hi not just off road or slippery surfaces as the common 4hi/4lo only allows.

In a regular 4x4 with open diffs when you stick it in 4wd it splits the power equally to the front axle and to the rear axle, but at the axle the differential give all the power & torque to the wheel with the least resistance. Therefore when you watch a video of a vehicle spinning a tire means the person has open diffs, has nothing to do with the transfer case. Factory had options for limited slips diffs or you can do an aftermarket locker that is limited slip or a full locker.

Did that sound less confusing?

[jimmydaux]

Did you notice he said NV? Maybe he was alluding to the NV241 out of the Rubicons? Still concept is the same but he may be thinking that the rubicon transfercase offers more than it really does.

THe rubicon has lockers front and rear, maybe hes assuming that the transfercase provides that locking and not the axles themselves.

[ECKSJAY]

OP is thinking of a NV242HD case in the lock position. They didn't come in Cherokees. The single wheel spinning is an open axle differential.

[PolishX]

so how would a 242 operate in conjunction with a detroit in the rear ?

[ECKSJAY]

so how would a 242 operate in conjunction with a detroit in the rear ?

Just fine as long as you don't run it in fulltime mode. :)

[RTicUL8]

Purdy picture...



http://i35.tinypic.com/ff47e8.jpg

.

[bjoehandley]

Just fine as long as you don't run it in fulltime mode. :)


Why would it matter if the Detroit was in the rear and the truck in full time?

[PolishX]

thats what I was wondering I have a 242 and a detroit , I never use full time 4wd .

[bcmaxx]

thats what I was wondering I have a 242 and a detroit , I never use full time 4wd .

apparently a locker in the front in fulltime will act like it normally does in part time, inability to turn without binding/wheelhop

[bjoehandley]

I understand that with the locker up front, but would it matter out back only?

[woody]

A locker in the rear wouldn't matter one bit (to the operation of the 242 case in 4hi-fulltime mode)

The center diff in the 242 allows some slip FRONT TO REAR.

Picture looking down at a front (steer) axle... with an ARB or OX. When the wheels are turned (steered), the outside tire is traveling further than the inside tire. With the locker open (or an open diff) this is allowed to occur. Lock that diff up, and the inside tire would be forced to keep up. This is exactly why spools and welded diffs are not a great plan for a street-driven rig.

OK now turn that picture around 90° and pretend that ARB/OXed diff is a 242 transfer case, and that the axle shafts are the output shafts (connected to the driveshafts...) The 242 in full time mode is operating just like an unlocked locker, and can be operated on dry roads. Shift it into part time mode (low or high) and it's like locking the case up: Both outputs are tied together. You could drive on dry road in 4-part time, but the case will likely bind up and could possibly dissasemble itself in a spectacular manner.

[bjoehandley]

A locker in the rear wouldn't matter one bit (to the operation of the 242 case in 4hi-fulltime mode)

The center diff in the 242 allows some slip FRONT TO REAR.

Picture looking down at a front (steer) axle... with an ARB or OX. When the wheels are turned (steered), the outside tire is traveling further than the inside tire. With the locker open (or an open diff) this is allowed to occur. Lock that diff up, and the inside tire would be forced to keep up. This is exactly why spools and welded diffs are not a great plan for a street-driven rig.

OK now turn that picture around 90° and pretend that ARB/OXed diff is a 242 transfer case, and that the axle shafts are the output shafts (connected to the driveshafts...) The 242 in full time mode is operating just like an unlocked locker, and can be operated on dry roads. Shift it into part time mode (low or high) and it's like locking the case up: Both outputs are tied together. You could drive on dry road in 4-part time, but the case will likely bind up and could possibly dissasemble itself in a spectacular manner.


That's what I wanted to know!


Thank You!