A340 Sonnax Transmission parts, repair guidelines, problems, manuals
Transmission general data
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| 4 | AT | RWD | 300 | 11 | 4 | Toyota T-IV |
What are you looking for?
Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor
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Technical issues and repair guidelines
Each modification in this transmission family had some updates in the electrical part (linear solenoids) of the valve body and torque converter.This transmission is quite simple, balanced and has a huge resource reserve. The repair of this gearbox usually takes place in cars with high mileage and includes replacement of worn-out spare parts. It is almost always the case that the torque converter of this transmission is handed in for repair. Operating with the worn-out lockup leads to the output shaft beating and excessive side load on the pump, seal, and bushing.
Operation of the A340-equipped car with contaminated fluid results in wear-out of bushings through which the oil leaks out leading to main pressure losses. Almost all bushings are replaced together with rings and gaskets included in the repair kit. Firstly, the pump bushing gets out of service. Because of damaged bushings the pump may have performance efficiency problems leading to the oil pressure shortage in packages, therefore friction components of packages primarily involved in operation start slipping and get burnt.Commonly, frictions (with steel discs) of Forward package get burnt. The brake band is standard for all modifications. It is replaced when the car comes to repair with burnt fluid. The replacement of solenoids is common for old cars (produced before 1998).