| General repair instructions |
| Proper tools and the maximum possible care and cleanliness are essential for satisfactory repairs to the transmission units. The usual basic safety precautions also naturally apply when carrying out repair work. |
| A number of generally applicable instructions for the various repair procedures - which were previously repeated at numerous places in the Workshop Manual - are summarised here. They apply to the work described in this Manual. |
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| Observe rules for cleanliness when working on gearbox → Chapter. |
| After fitting the gearbox, check the following fluid levels and top up if necessary: |
| O-rings, oil seals and gaskets |
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| Always renew O-rings, seals and gaskets. |
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| After removing gaskets and seals, always inspect the contact surface on the housing or shaft for burrs resulting from removal or for other signs of damage. |
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| The open side of the oil seals faces toward the side with fluid filling. |
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| Lightly lubricate the outer circumference and sealing lip of seals with ATF before installing. |
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| Lightly lubricate O-rings with ATF or vaseline before installation to prevent them getting crushed during assembly. |
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| Use only ATF or vaseline on all parts running in ATF. Other lubricants will cause malfunction of the gearbox hydraulics. |
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| When installing a new oil seal, position the seal in the housing so that the sealing lip does not contact the shaft in the same place as the old seal (make use of installation depth tolerances). |
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| Renew paper gaskets, clean all sealing surfaces thoroughly and remove previous gaskets completely. |
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| Slacken bolts in reverse sequence to the specified tightening sequence. |
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| Nuts and bolts which secure covers and housings should be loosened and tightened in diagonal sequence and in stages if no tightening sequence is specified. |
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| The tightening torques stated apply to non-oiled nuts and bolts. |
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| Always renew self-locking bolts and nuts. |
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