300Tdi Defender Manual Gearbox | R380 Gearbox
MANUAL GEARBOX
1
DESCRIPTION AND OPERATION
R380 GEARBOX
Description
The all synchromesh five speed manual gearbox unit,
is married to a two speed transfer gearbox.
All the gears, including reverse, run on needle roller
bearings and the main, layshaft and primary shafts
are supported by tapered roller bearings.
The whole of the geartrain is lubricated through
drillings in the shafts, supplied by a low pressure
pump driven from the rear of the layshaft. The gear
change has a single rail selector and spool type
interlock. The main and transfer gearboxes ventilate
through nylon pipes, which terminate high up in the
engine compartment to prevent water entry when the
vehicle is operating in adverse conditions.
R380 Gearbox Components
1. Mainshaft 1st gear
2. Mainshaft 2nd gear
3. Mainshaft 3rd gear
4. Primary input shaft/4th gear
5. Mainshaft 5th gear
6. Layshaft
7. Mainshaft
8. Lubrication pump
9. Oil filter
10. Ventilation pipe
11. Single rail gear shift
12. 1st/2nd synchromesh
13. Oil seals
14. 3rd/4th synchromesh
15. 5th/reverse gear synchromesh
16. Selective spacers (mainshaft/layshaft end float)
17. Selective spacer (5th gear/reverse hub)
