The main malfunctions that require removal of the gearbox from the car:
- - increased (compared to usual) noise;
- - difficult gear shifting;
- - spontaneous switching off or fuzzy switching on of gears;
- - oil leakage through seals and gaskets.
In addition, the gearbox is removed to replace the clutch, flywheel and rear engine crankshaft oil seal.
The work of removing and installing the gearbox is very laborious, so be sure to first make sure that its malfunctions are not caused by other reasons (insufficient oil level, defects in the clutch drive, loosening of the gearbox, etc.).
The gearbox is quite heavy and has an awkward shape to hold, so we recommend removing it with an assistant.
You will need: "13" keys. "18", flat blade screwdriver.
Mount the vehicle on a lift or a pit.
Remove the crankcase guard and lower part of the left engine mudguard.
Drain the gearbox oil.
Remove the battery.
Remove the plastic spacer from the battery tray.
Remove the air filter inlet sleeve.
Remove the electronic engine control unit.
Remove the right and left mounting blocks.
It is not necessary to remove the electronic engine control unit and mounting blocks.
Their absence facilitates access to the fastening of the left suspension support of the power unit.
Loosen the tightening clamp securing the transmission control rod to its lever
Mark in any way possible (for example, with paint) the relative position of the rod and the lever, so that when reassembling the drive, move the clamp along the rod.
And disconnect the rod and lever
Press the retainer of the speed sensor harness connector with a pointed object and disconnect the connector.
Disconnect the clutch release cable from the clutch release fork and bracket on the gearbox
Remove the two bolts securing the ground wires to the gearbox and disconnect the wires
Prying off the retainer of the reverse light switch wiring harness block with a screwdriver, disconnect the block from the switch
Remove the engine harness from the holder on the gearbox and move it to the side.
Remove the two bolts securing the TDC sensor to the clutch housing, move the sensor along with the wiring harness to the side
Pressing the clamp of the oxygen concentration sensor wiring harness block, disconnect the block and remove the harness block from the holder on the gearbox.
Remove the transmission breather hose from the holder.
On both sides of the car, unscrew the two bolts securing the front brake calipers to the steering knuckles, move the calipers to the side without disconnecting the brake hoses from them, and secure in any way possible (for example, by tying with wire to the front suspension springs)
Disconnect the steering rods from the steering knuckle levers, unscrew the two nuts securing the shock absorber struts to the steering knuckles and remove the bolts from the holes of the knuckles and struts.
Disconnecting the front brake calipers, steering rods and shock absorber struts is necessary in order to be able to disconnect the internal hinges of the front wheel drives from the gearbox without removing the drives themselves.
While moving the knuckles to the sides, disconnect the front wheel drive inner joints from the gearbox (see "Changing Drives Renault Logan front wheels).
When disconnecting the left front wheel drive inner hinge from the gearbox, be careful not to drop the hinge rollers into the gearbox housing if they are loosely seated on the trunnions of the three-pin hinge hub.
Remove the starter
Remove the four bolts securing the oil sump to the clutch housing.
Remove the stretcher.
In the process of removing the subframe, the rear suspension support of the power unit is disconnected from the gearbox
Remove the two upper bolts securing the gearbox to the engine
Place the engine and gearbox securely.
Remove the left powertrain mount.
Remove the two nuts on the bottom of the gearbox to the engine on the left and right
Move the gearbox back until the clutch housing studs come out of the holes in the cylinder block.
In this case, the input shaft of the box should come out of the hub of the clutch disc.
Move the box as far back as possible, remove the support from under it and tilt the back of the box down, remove it from the car.
When removing the gearbox, do not rest the end of the input shaft on the petals of the diaphragm spring so as not to deform them.
Install the gearbox and all removed parts and assemblies in the reverse order of removal.
Before installing the gearbox, we recommend lubricating the input shaft splines and the outer surface of the clutch release bearing guide bushing with a thin layer of refractory grease.
Check how the clutch disc is centered using a special mandrel (see "Renault Logan Clutch Replacement").
Fill the gearbox with oil.