Originally Posted by Deanwa
I noticed this problem while on vacation with a heay load in the jeep. Now that it is unloaded, it does not occur. I suspect that it has to do with the angle of the u-joints. I was loaded with 4 passengers and 300 lbs of gear for about 1800 miles.
Still wondering if this jeep has auto locking hubs or if the hubs are just always locked in. If anybody knows, please let me know. It is the model that has the choice of part-time 4wd, full-time 4wd or 2wd.
P.S. We went a ways up the Rubicon trail while at Lake Tahoe. What a lot of fun! (No we did not go all the way).
Ok, from your description, you have the NP242 Selec-Trac transfer case.
What you don't have is locking hubs.
What you do have is open differentials front and rear, and a transfer case that functions (essentially) as an open differential between the front and rear axle.
What this means is:
2HI - The transfer case is (mechanically) disconnected from the front axle. Use without restriction.
4PT- The transfer case is connected (locked) to the front and rear axles. All slip in the linkage is between the tires and the road surface. Therefor this should only be used in ice, snow, sand, loose gravel, etc.
4FT - The transfer case is connected (but open) to the front and rear axles. Slip between the axles is allowed inside the transfer case. Use without restriction. Torque split is 48/52 front/rear.
N - Both axles are disconnected from the transfer case. Use for towing your Jeep.
4LO - Works the same as 4PT except the gear ratio is increased to 2.72:1, providing much more torque to the wheels. This should only be used on slippery surfaces at very low speeds.