Castrol MTX Synthetic Gear Oil 75W-140 1L (for final drive - cardan)
Apple Pay, Google Pay, Credit Card or PayPal.
Fast shipping via DHL (and partners). If in stock, 2–7 days across the EU.
+420 604 111 341 info@mojegs.cz
Video of the complete final drive service:
Times in the video for individual tasks:
1:15 - 2:20 disassembly of the fender, loosening of the filler bolt, loosening of the drain bolt - you will mainly need Torx of various sizes, all of which can be found in the Honiton set
3:30 - 6:40 disassembly of the wheel, brake caliper, lowering the final drive, disconnecting the shaft
6:54 - Castrol Optimol - lubrication of the splined shaft
8:06 - Staburags - bonding of the boot
8:50 connection of the shaft
10:40 returning the boot to the correct position (if damaged or worn out, replace it with a new one (rear boot for R1250GS/A, R1200GS/A LC 2013-2018, rear boot for R1200GS/A 2004-2012, rear boot for R1150GS/A, R1100GS))
11:00 - 13:20 reassembly of all components, including the specified torque settings - you will need a torque wrench
13:35 fill with 180ml of suitable oil (we recommend Castrol 75W-140, or Motorex Penta LC 75W-140 or original BMW Hypoid Axle Oil G3). For accurate filling, then use a syringe.
A short treatise on gear oils:
Gear oil specifications
Viscosity
For evaluating the viscous properties of gear oils, the SAE (Society of Automotive Engineers, USA) specification is used. This standard is used to classify oils into 4 winter classes, marked with a number and "W" (from English: Winter), and 5 summer classes marked with a number.
Winter classes: 70W, 75W, 80W, 85W
Summer classes: 80, 85, 90, 140, 250
If only one class is used in the designation, it means that the oil is monograde (summer or winter). When a combination of summer and winter classes is used (e.g. 80W-90), it is a multigrade oil or all-season oil. More often, unlike motor oils, manufacturers require monograde gear oils.
Performance categories
The performance category of gear oils is indicated by the API (American Petroleum Institute, USA) classification. The performance class designation consists of the letters "GL" (from English: Gear Lubricant) and a number indicating the performance level, of which there are six.
Currently, the following four performance classes are used:
GL-3 - low-additive oils for manually shifted transmissions with medium loads
GL-4 - highly additive oils primarily intended for manually shifted transmissions and lightly loaded hypoid gears
GL-5 - oils intended for heavily loaded hypoid gears, operating in the most demanding conditions
GL-6 - oils for hypoid gears operating in extreme conditions. So far, they are used very rarely
Comparison of viscosity classifications of SAE transmission and motor oils
Viscosity grades of transmission oils according to SAE J306A
How to properly choose transmission oil?
When selecting transmission oil, the same principles apply as when choosing motor oil.
1. The first principle when selecting transmission oil is to follow the manufacturer's instructions, included in the manual for each vehicle. Only the manufacturer of the transmission (vehicle) can responsibly say which oil can be used. Practically no manufacturer recommends a specific brand of oil (this contradicts the competition laws in the European Union). Transmission manufacturers (cars) recommend oils according to the so-called performance specifications, e.g. API GL-4, API GL-5, and viscosity specifications SAE, e.g. 75W, 80W-90.
2. For such recommended oils, the change intervals are then determined (usually 10,000 km or 1 year).
3. If you do not have the vehicle manual, ask the manufacturer (at the Czech importer headquarters) of the vehicle. Remember, the vehicle manufacturer does not recommend a brand of oil, but only the performance and viscosity specification.