How to choose a used manual transmission for auto disassembly?
The purchase of a used manual transmission is an excellent alternative to major repairs. After all, in this case, the owner of the car does not depend on the quality of spare parts and the skill of service center employees.
By contacting a reliable company, you can get a working manual transmission for much less money, compared to the amount that would have to be spent on repairs. Consider what you need to pay attention to when buying a manual transmission to protect yourself from possible troubles. 

 
A little theory
The principle of operation of the manual transmission is based on a stepwise change in the gear ratio between the gears, which allows you to adjust the angular velocity and the amount of torque. The gear ratio is the ratio of the number of teeth between the driven and driving gears. The driver of the vehicle independently selects the appropriate gear, depending on the road conditions.
Thus, the task of a manual transmission is reduced to converting the torque of the engine through the interaction of gears of various configurations. The main design elements of a manual transmission include:
* Primary, secondary, and intermediate shaft with gears.
* Gearbox crankcase.
* Synchronizers.
• Gearshift mechanism.
* Gearshift lever.  
 
It is worth noting that the number of shafts with gears depends on the type of transmission design. There are two- and three-shaft models of manual transmissions. Lubrication of the movable working elements is carried out with the help of transmission oil.
Now you can go to the specifics of choosing a manual transmission. Understanding the principle of operation and knowledge of the basic design elements will help to correctly assess the condition and degree of wear of the gearbox.
Visual inspection
In order to accurately assess the condition of the gearbox, it will be necessary to disassemble this unit or install it directly on the car. However, in most cases, even a visual inspection and a few simple steps will help to assess the quality of the product.
The appearance of the gearbox plays an important role. The presence of chips, cracks or other visible defects is unacceptable. Oil stains indicate poor sealing or the presence of microcracks. Such surprises can turn into serious problems in the future.  

 
Gear shifting should be carried out clearly, without extraneous sounds. It is also not superfluous to check the smooth rotation of the shafts and the presence of backlash at the flanges.
Transmission oil
Checking the condition of the oil is the easiest way to check the condition of the gearbox. It should be remembered that normal transmission oil should be transparent, of a natural brown color. A thick dark color is a sign of a spent lubricant resource. 

 
The smell of burning indicates a malfunction of the mechanism. It is better to refuse the purchase of such a product. You should also be careful about boxes in which there is no oil completely or vice versa - it is filled above the required level.
Storage conditions
Storage conditions are an important factor that many people pay absolutely undeservedly little attention to. Ideally, the box should be stored in a dry place assembled with the engine. This eliminates the possibility of dirt getting inside the case.
If the gearbox is not stored in the proper way, then most likely the new owner will have a long struggle with the recovery processes. In fairness, we note that in most cases, the buyer will not be able to inspect the storage location of the spare part.
Removing the pallet
After dismantling the pallet, the condition of the internal cavities of the box should be assessed.
Special attention should be paid to the inspection of gears. The presence of chips and traces of mining is not allowed. There should be no metal shavings on the inner walls of the box. 

 
Warranty obligations
The availability of a warranty period from the seller is an excuse in favor of buying a box. As already mentioned above, after installing the unit on the car, the owner will not need much time to check the operation of the manual transmission.
The responsible seller will provide information about the exact mileage of the car from which the spare parts were removed. This will help to calculate the approximate resource of the node and decide on the feasibility of the purchase.
Result
If you have decided to buy a used gearbox, contact trusted sellers who will not hide the defects of the offered product. Regardless of the condition of the purchased box, before installing it on the car, it is necessary to replace all the oil seals and pour new transmission oil. This will help to increase the service life of the node.
On the portal a large selection of manual transmissions is presented, which will allow you to pick up goods for almost any car.