Range Rover Classic
BORG WARNER
1
FAULT DIAGNOSIS
BORG WARNER - SYMPTOMS
Oil leaks
1. Check that nylon ventilation pipes are not
blocked or damaged.
2. Check lubrication level and specification in both
boxes and recheck leaks.
3. Location area of leak.
A -
Transfer box front output flange oil seal.
B -
Transfer box rear output flange oil seal.
C -
Oil leaking from vent hole between main
and transfer boxes.
The oil may be leaking from the main or
transfer box oil seals. Renew the faulty
seal.
D -
Oil leaking from engine flywheel housing.
The oil may be leaking from the gearbox
front seal, torque converter seal or the
engine crankshaft rear seal. Renew the
faulty seal.
Loss of drive - no abnormal noise from box.
1. Check that the main transmission unit is
satisfactory and confirm that loss of drive is in
the transfer box.
2. Check by ’feel’ the operation of the High/Low
transfer gear selection. Suspect failed viscous
unit.
Knocking or rattling noise in high and low ratio.
1. Check lubricant specification and level, if low do
not top up at this stage.
2. Drain lubricant and check for contamination or
metal particles.
Suspect drive chain has stretched.
Abnormal noise in operation.
1. Check lubricant specification and level, if low do
not top up at this stage.
2. Drain lubricant and check for contamination or
metal particles.
Suspect oil pump failure, mechanical wear or
damage.
Transmission wind up
’Transmission wind up’ is a build up of tension in the
transmission which will only occur if either the
differential or viscous unit is partially or completely
seized.
Vibration - harshness
1. Check operation of differential and viscous units.
Ensure that neither is partially seized.
NOTE: If both are satisfactory, but the
vibration - harshness is still present, the
alignment of the propeller shafts and
balance of the road wheels should be checked.
For balancing of road wheels.
See WHEELS AND
TYRES, Repair, Wheel Balancing
For propeller shaft alignment.
See PROPELLER
SHAFTS, Description and operation, Propeller
Shaft Alignment