DSI M11 AT case repair. Support bearing fit.

SsangYong New Action, Korando C

During the operation of the automatic transmission mechanical part, not only moving parts but also the housing arebeing worn. One of the signs of the housing wear is that the needle bearings seats are damaged.

Compensating the pressure of the drive shaft on the support bearing causes it to rotate inside the seat. Over time, this leads to an increase in the diameter of the seat, thrash of the bearing and vibration of the support shaft. The wearout increase strengthens the thrash and the bearing can break into pieces.

As a consequence of the destruction of the bearing, the debris of the cages and the support rollers get into the mechanical part of the box, which can cause a jamming of the gearshift mechanism, chip formation and failure of the valve body electromechanical control unit . In fact, the failure of the bearings can cause a major overhaul of the automatic transmission.

The automatic transmission must be checked, including the condition of support bearings to prevent such consequences, when there is vibration and slipping during gearshifting.
To solve the problem of bearing seats wear, specialists of Maktrans company have developed a technology for repairing the AT case , which can significantly save your on its replacement. In the beginning, a supporting bearing of slightly larger diameter than the original one is selected. The next stage - boring the seat to the desired size, fitting and mounting of the entire unit. The boring operation is performed on digitally controlled machines and allows to maintain the parameters recommended by the manufacturer.

As a result of repair, the AT case  gets the state of the new one, which considerably prolongs the life of the automatic transmission as a whole. Quality/price ratio compared with the AT case "from disassembly" (which passed a lot of thousands km) - clearly indicates unambiguous evidence in favor of such repairs. The regenerated case completely corresponds to the parameters of the original  one and this is confirmed by mandatory on the road tests.