If you notice characteristic vibrations during acceleration or suspicious sounds from under the hood, most likely the problem lies in tripoid or the inner joint crosspiece. Ignoring these signs can lead to jamming of the unit and complete loss of vehicle control. In this article we will look in detail at how to choose the right one spare part, recognize defects and perform independent replacement without contacting service.
Design and principle of operation of the internal hinge
Unlike the external constant velocity joint, which operates at large wheel angles, internal CV joint on Nissan Almera Classic performs the function of compensating for axial movements of the axle shaft. When the car goes over bumps, the suspension compresses and unclenches, forcing the axle shaft to move along its axis, and it is the tripoid mechanism that allows this to happen without jerking or loss of power.
Structurally, this unit consists of three needle-shaped rollers (needles) installed in the separator, which move inside the cup body. This design allows the unit to operate at large axis deflection angles, but at the same time requires ideal lubrication conditions. Protective boot plays a decisive role in maintaining the functionality of the mechanism, since even a small amount of sand getting inside leads to instant abrasive wear of the bearings.
Often, owners confuse the symptoms of a malfunctioning external and internal hinge, which leads to unnecessary replacement of parts. The outer CV joint usually crunches when turning, while problems with the inner one manifest themselves differently. Understanding the mechanics of the unit will help you pinpoint the source of the problem and save money on repairs.
Main symptoms of malfunction and diagnostic methods
The first and surest sign of wear and tear tripoid mechanism is a strong vibration that is transmitted to the body and steering wheel during acceleration. This vibration begins at a certain speed range (usually 40-60 km/h) and can increase as speed increases, disappearing when braking. If you feel that the steering wheel hits your hands when you press the gas, and not while driving, you should immediately check the internal grenade.
The second important symptom is the appearance of specific clicks or knocking noises when suddenly starting from a stop, especially if the car is parked on a slope. The sound may come from the engine compartment area or from the transmission side. Sometimes the malfunction is accompanied by play, which is felt when you try to shake the axle shaft with your hands after removing the wheel.
For an accurate diagnosis, you need to perform a few simple steps:
- 🔍 Raise the front of the car on a lift or jacks and rotate the wheel manually, listening to sounds from the box.
- 🔧 Visually inspect the condition protective boot — the presence of cracks, tears or traces of leaked lubricant indicates the need for urgent replacement.
- 🛠️ Check the play of the axle shaft by grasping it at the CV joint housing and trying to swing it along the axis of rotation.
Selection of quality spare parts and articles
Spare parts market for Nissan Almera Classic is oversaturated with offers, and choosing the right manufacturer is half the battle. The original part is marked with a code 39450-ED00A or 39450-ED00B (depending on the year of manufacture and type of drive), but its cost is often unreasonably high for a budget car. Many owners choose high-quality analogues that are not inferior to the original in terms of service life, but are much cheaper.
Among the trusted manufacturers, it is worth highlighting brands specializing in Japanese cars:
- 🇯🇵 NTN and Koyo are original suppliers for Nissan, the quality of their products is considered standard.
- 🇩🇪 GKN (first Spicer) - German quality, often found complete with new axle shafts.
- 🇷🇺 Sobinsky plant - a budget option that, with careful use, lasts quite a long time.
When purchasing, be sure to check the integrity of the packaging and the presence of all the necessary components: a locking ring, a washer and, most importantly, high-quality lubricant. Cheap Chinese analogues are often supplied without lubricant or with a low-quality composition, which reduces the service life of the unit to several thousand kilometers.
- Original (Nissan)
- NTN / Koyo
- GKN (Spicer)
- Budget analogue (China/Russia)
Preparation for replacement and necessary tools
To carry out replacement work internal CV joint you will need a certain set of tools and equipment. Without a lift or a quality jack and stops, the process will be extremely difficult and unsafe. Make sure you have access to the engine compartment from below as the joint mount is located inside the transmission.
You will need the following tools:
- 🔑 Socket wrenches and sockets for 17, 19, 22 for unscrewing the hub nut and subframe mounting bolts.
- 🔨 Hammer and drift for knocking out the axle shaft from the differential.
- 🔧 Special puller for the retaining ring (or powerful pliers).
- 🧼 Brake cleaner and rags to remove old dirt and grease.
Before starting work, be sure to block the rear wheels and put the car on the handbrake. If you are working in a pit, make sure it has secure guards. Removing the axle shaft is a process that requires physical strength, so prepare a place for the parts to be set aside in advance.
☑️ Preparation for replacement
Step-by-step instructions for replacing the inner CV joint
The first step is to remove the wheel and unscrew the hub nut. The nut tends to become sticky, so it may be necessary to use an impact wrench or a long lever. After this, it is necessary to disconnect the steering tip and press the pin out of the steering knuckle to make room for pulling out the axle shaft.
Next comes the careful removal of the axle shaft from the differential housing. To do this, you need to insert a pry bar between the gearbox and the inner race of the CV joint and carefully pry it until the locking ring comes out of engagement. Be careful: some oil may spill out of the box, so prepare a container for draining or a plug for the hole in advance.
After removing the axle shaft, the old one tripoid is removed from the shaft. It is usually held in place by a retaining ring that needs to be squeezed with pliers and removed. The shaft is cleaned of old grease and rust, after which a new CV joint is put on it. It is important not to damage the retaining ring during installation.
Features of removing the axle shaft from the differential
Sometimes the axle shaft is so tight that it cannot be pulled out without using force. In this case, you can use a special mandrel, resting against the end of the axle shaft, but under no circumstances hit the CV joint or bearing with a hammer so as not to destroy them. If the axle shaft does not move, check to see if the retaining ring is stuck in the groove.
Installation of a new unit is carried out in the reverse order. Don't forget to put on a new one protective boot before installing the joint on the shaft, otherwise it will have to be removed again. Secure the boot with clamps, making sure they fit snugly but are not pinched.
Lubrication and final assembly
The internal CV joint requires the use of a specialized lubricant based on molybdenum disulfide. Conventional lithium grease or Litol-24 are not suitable for this task, since they do not provide the necessary extreme pressure properties under high loads. High-quality spare parts often come with a bag of lubricant, but it is better to use a proprietary compound from the hinge manufacturer.
Apply lubricant evenly to all rubbing surfaces: needles, separator and inner walls of the housing cup. Excess lubricant is not needed, as it can be squeezed out through the boot when heated. After assembly, make sure that the boot is not twisted and has uniform tension along its entire length.
It is important to check the oil level in the gearbox after work, as some of the lubricant may have leaked out when removing the axle shaft. If the level is below normal, add gear oil to the mark. This will prevent damage to the differential gears.
Before reinstalling the axle shaft, apply a thin layer of copper grease to the threads of the hub nut and to the nut itself. This will ensure easy unscrewing the next time you replace it and prevent it from jamming due to overheating.
Typical repair mistakes and their consequences
One of the most common mistakes is improperly tightening the hub nut. If it is not tightened enough, the axle shaft may play, which will lead to rapid wear of the hub bearing and the CV joint itself. If you overtighten, you can break the threads or deform the parts, which will lead to the need to replace the entire assembly.
Another mistake is using old clamps to secure the boot. Metal clamps lose their elasticity over time and may break, allowing dirt to get inside. Always use new clamps, preferably screw clamps or special spring clamps that provide uniform pressure.
Often, mechanics forget to check the condition of the differential seal. If the oil seal has signs of wear or leakage, replacing only the CV joint does not make sense, since oil will leak onto the new boot, destroying the rubber. In such cases, it is recommended to immediately replace the oil seal.
Specifications and comparison
For clarity, we will compare the main parameters of the original unit and popular analogs so that you can make an informed decision when purchasing.
| Characteristics | Original (Nissan) | NTN | GKN |
|---|---|---|---|
| Housing material | Steel 45 | Steel 45 | Steel 45 |
| Number of needles | 3 pcs. | 3 pcs. | 3 pcs. |
| Service life (km) | 100 000+ | 80 000 - 120 000 | 90 000 - 110 000 |
| Average price (RUB) | 4500-5500 | 2500-3200 | 2800-3500 |
Please note that the difference in price between brands can be significant, but with proper installation and maintenance, the service life of all listed manufacturers is comparable. The main thing is not to buy fakes, which are easily distinguished by the quality of the packaging and lack of labeling.
⚠️ Attention: Never use graphite grease or oil to lubricate the CV joint. This will lead to instant destruction of the bearings and jamming of the unit.
Results and recommendations for use
Replacement internal CV joint on Nissan Almera Classic - a task of medium complexity that even an experienced car enthusiast can handle with a basic set of tools. The main thing is to take your time and carefully monitor the condition of each element during assembly. Regularly checking the condition of the boots and the oil level in the gearbox will help prevent premature failure of the unit.
Remember that vibration in the steering wheel during acceleration is not just discomfort, but a signal of a serious transmission problem. Ignoring this symptom can lead to more expensive repairs, including replacing the differential or the entire transmission.
⚠️ Attention: If the vibration does not disappear after replacement, check the wheel balancing and the condition of the engine mounts, as the problem may be hidden elsewhere.
By installing a high-quality unit and following the operating recommendations, you can forget about problems with the transmission for many years. Regular inspection of boots every 15,000 km is the most effective way to extend the life of the internal CV joint.
Timely replacement of the boot and the use of proper lubricant increase the life of the internal CV joint by 2-3 times compared to operation in a faulty condition.
Frequently asked questions (FAQ)
Is it possible to replace only the inner CV joint without changing the axle shaft?
Yes, this is possible and is the most economical option. However, this requires a special tool to remove the retaining ring and remove the joint from the shaft. If the axle shaft has deep scoring or corrosion, it is better to replace it entirely.
How often should the lubricant in the inner CV joint be changed?
If the boot is in good condition, the lubricant does not require replacement throughout the entire service life of the unit. If the boot is torn, the lubricant is washed out and the assembly requires immediate replacement or repair with a complete replacement of the lubricant.
Why did the new CV joint start to vibrate immediately after installation?
This may be due to incorrect installation of the retaining ring, misalignment of the boot, or a defective part. Also check whether the seating surface on the axle shaft has been damaged.
Do I need to change the transmission seal when replacing the CV joint?
It is recommended to replace the oil seal, especially if it shows signs of leakage or wear. This will prevent oil loss and contamination of the new CV boot.
What is the tightening torque for the hub nut for Nissan Almera Classic?
The tightening torque of the hub nut is about 180–200 Nm. Use a torque wrench for precise tightening to avoid damaging threads or bearings.