Welcome everyone. In this post, I am trying to help you to explore the causes of the faults produced by transfer cases. Let us start with chain-driven transfer cases. The most common fault we encounter here is caused by the chain itself, which unfortunately elongates. We do not have to think about elongations of several centimetres, usually millimetres decide whether to replace the chain or not. This can be caused by material fatigue or a component from an unsuitable manufacturer.
It also increases the lifespan of the chain if you pay attention to the cooling of the transfer chain. Needless to say, you need to have the right amount and quality of lubricant in the transfer case. The fault is relatively easy to detect. When starting with a big throttle blip, we hear a clacking, pounding sound from under the car, around the middle section. And we will also feel that for sure. There are bearings in all types of transfer cases. We can observe two main fault phenomena in these. One is the humming of the transfer case, and the other is the hanging of the shafts, or the rotation at the wrong speed. This is also due to the lack of oil and the poor viscosity.
In the case of so-called active transfer cases (ATC), these are my personal favourites, observable clutch faults occur in many cases. The fault symptom is simply that the car starts to jerk at a certain speed when accelerating. This can also be remedied. Clutch rebuild kits can be purchased for a variety of transfer case types. These include the necessary flaps and all the other things you need for the repair. Their service life is also related to transfer case oil change intervals. At this point I would close this topic until our next meeting.
I hope I was able to help even with these few insights. Thank you for reading my post. Zsolt Török T.C.P