another jeep question?

Question

what is a part time/full time transfer case?

Answer 1

There are two ways to answer this question.

If you mean: The lever on my t-case says 2HI-4HI-N-4LO is this a part time/ full time thansfer case? The answer is no. The 4WD mode in this type of system is non differentiated.

Explanation: When you go around a corner the inside wheels turn slower than the outside wheels. Your differentials are there to do this differentiation (differentials - differentiation get it?). The diffs get their power from the drive shafts and the shafts get their power from the transfercase. When you turn a corner not only does the inside go slower than the outside but the front travels a shorter distance than the back (make a turn on some fresh snow and you'll see what I mean). The T-case in the above example turns both drive shafts at the same speed. This will cause the front and rear axle to go the same distance. The problem is that the front axle wants to go a shorter distance than the rear, and since the distances are different, all 4 tires will be turning different speeds in the turns. If you try this on dry pavement the Jeep will hop or you'll hear tire chirp because the tires are turning at the wrong speed. If you look in your manual it says to use 4WD only in slippery conditions. If you run in 4WD on dry pavement you'll be stressing the driveline every time you make a turn, which over time, will cause somthing to break.

If you mean: The lever on my T-case says 2HI-4HI(part time)-4HI(full time)-N-4LO is this a part time/ full time transfer case? The answer is yes. The 4WD(part time) setting is exactly the same as the above example, and you'll get the same wheel hop when you try to turn.

But in 4WD(full time) there is a mini differential in the transfercase that allows some differentiation between the front and rear axle shafts. This means there is no hopping around corners and you'll be able to leave it in 4HI all the time without worring about breaking anything. The system has limits though. If you turn a very sharp 90 degree turn it will exceed the limits of the T-case diff and the Jeep will hop like before.

Please note that this is NOT All Wheel Drive. AWD systems use slipping clutches to control wheel speeds. The Jeep 4WD systems depend on differential action, meaning one shaft turn 2 RPM faster while the other turns 2 RPM slower.

Sorry for the long read.

Answer 2

A part time transfer case, is for offroad use, or only used when the road conditions are slippery enough to allow the tires to rotate at different speeds for cornering.

A full time transfer case allows the vehicle to be driven in full time 4WD due to an open center differential that allows the axles to rotate at different speeds. Some full time transfer cases also have a 2WD, and part time 4WD position available also.

Quadra-drive is full time/part time.
Quadra-trac is full time also, but does not have a 2WD option

Answer 3

Part time= part of the time, the 4 wheels push the vehicle(decided by the driver)
Full time=all the time the 4 wheels are in action.

Answer 4

A partime transfer case means you can switch from 2wd(best gas milage) to FWD ,, fulltime is just that... always four wheel drive

Answer 5

A part time means that you can choose whether you want to be in 4h 4l 2h or N.