- elevated (compared to usual) noise;
- difficult gear shifting;
- spontaneous disengagement or fuzzy engagement 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.
An automatic transmission is removed for almost the same reasons as a manual transmission, except for the need to replace the clutch and flywheel, which in this case are absent. Removal and installation techniques for manual and automatic transmissions are almost the same and are described using the example of a manual transmission. The difference lies in the size and number of transmission control cables, as well as the presence of hydraulic hoses in the automatic transmission connecting the gearbox to the cooling radiator.
Note. 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.).
Note. The gearbox is quite heavy and its shape is awkward to hold, so we recommend removing it with an assistant.
You will need: ring and socket wrenches «for 8», «on 10», «at 13».
1. Remove the air filter intake (see «Removal and installation of the air filter»).
2. Remove the battery tray (see «Removing and installing the battery»).
3. Turn out three bolts of fastening of an arm of the shelf of the accumulator battery …
4.... and remove the bracket.
5. Disconnect the gearbox control cables from the gearbox (see «Replacing the transmission control cables»).
6. Remove a casing of the mechanism of a gear change, having turned out three bolts of its fastening.
7. Drain the gearbox oil (see «Changing the oil in the gearbox»).
8. Remove the front wheel drives (see «Removal and installation of front wheel drives»).
9. Disconnect the wiring harness connector from the reversing light switch (see «Checking and replacing the reverse light switch»).
10. Disconnect the pipes from the clutch master cylinder (see «Replacement of pipelines of a hydrodrive of deenergizing of coupling»).
11. Disconnect the plastic pipe holder from the bracket on the gearbox.
12. Turn out two bolts of fastening «massive» wires to the body and take the wires to the side.
13. Turn out a bolt of fastening of the plug «mass» wires to gearbox housing..
14.... and take the wire to the side.
15. Turn out a bolt of fastening of a case of a transmission to the engine from above at the left.
16. Unscrew the stud nut securing the mounting bracket to the gearbox housing..
17....and remove the piping mounting bracket (coolant hose removed for clarity).
18. Turn out a hairpin of fastening of a case of a transmission to the engine from above on the right (coolant hose removed for clarity) and put aside «mass» the wire.
19. Remove the starter (see «Removal and installation of a starter»).
20. Securely support the engine or hang it out with a hoist. Install a similar support under the gearbox.
21. Remove the left support of the power unit (see «Replacement of the left support of a suspension bracket of the power unit»).
22. Turn out three bolts of fastening of an arm of the left support of the power unit …
23.... and remove the bracket.
24. Remove the rear support of the power unit (see «Replacing the rear support suspension of the power unit»).
25. Turn out four bolts of fastening of a transmission to an oil case.
26. Turn out a bolt of forward …
27.... and two bolts of the rear mounting of the gearbox to the engine.
28. Move the gearbox back until the input shaft of the box comes out of the hub of the clutch disc. Then move the box as far back as possible, remove the support from under it and, tilting the back of the box down, remove it from the car.
Attention! 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.
29. Establish a transmission, all removed details and knots in an order, the return to removal.
Note. Before installing the gearbox, we recommend lubricating the splines of the input shaft with a thin layer of refractory grease.
Note. Check how the clutch disc is centered using a special mandrel (see «Removal and installation of clutch»).
30. Fill the gearbox with oil (see «Changing the oil in the gearbox»).
31. Remove air from the hydraulic clutch release (see «Bleeding the hydraulic clutch release»).
32. If necessary, adjust the gearbox control drive (see «Gearbox control drive adjustment»).
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