Disassembly of the transfer case was considered in the article Dismantling the transfer case VAZ-2123
Before inspecting, clean all transfer case parts thoroughly with a brush and scraper and then rinse. Blow out the parts with compressed air.
Flush gearbox parts thoroughly before inspecting. This will make it easier to identify wear and damage to parts.
Check if there are any damages on the teeth of the main gears and if the contact spots on the working surfaces of the teeth are correctly located
The hydraulic block or hydraulic distributor, receiving signals from the electronic control unit, switches channels in the control valve block and controls the clutch engagement pressure
The main repair work for a five-speed gearbox is similar to repairing a four-speed gearbox.
Disassembly and assembly of the four-stage gearbox is described in the article “Disassembly and assembly of the VAZ-2107 gearbox”.
We remove the transfer case and clean it from dirt.
We drain the oil from the transfer case.
When disassembling the box, it is advisable to mark in any way, or remember where which part was, because many parts are similar.
When installing new parts, you need to take into account the gaps and grinding of adjacent parts.
The design of the gearbox is discussed in the article - "Features of the design of the rear gearbox VAZ-2123".
We wash and clean the gearbox from dirt and oil.
Before disassembling, clean the outside of the box with a cleaner or solvent.
Clean the removed parts with a solvent and dry with compressed air.
During disassembly, check the condition of the parts for wear and damage.
The transfer case VAZ-2123 is designed to change the amount of torque and distribute it between the front and rear axles.