Reassemble the gears on the gearbox shafts by reversing the disassembly procedure.
Take particular care when installing the idler gears.
The assembly of the 3rd and 4th speed gears and the relative fixing components on the secondary shaft is given as an example.
Fit the circlip (7), checking that it is fully inserted into its groove on the shaft.
Push the circlip into position with a suitable size tubular drift.