jamesmartin
Well-Known Member
been an interesting discusion 
Freelaner
Landy Driver
when i think of a differencial, i can't help but think of side to side rather than front to rear.
Freelaner
Landy Driver
and take all the fun away from the VCU?
Diesel Do
Well-Known Member
Think orrible smelly tratter. They've got three proper diffs
jamesmartin
Well-Known Member
you would if you thought of disco defender and rr
jamesmartin
Well-Known Member
Diesel Do
Well-Known Member
Be the next best thing to curing 1.8 head gasket failures
Freelaner
Landy Driver
Be the next best thing to curing 1.8 head gasket failures
mines only gone once
now it's got all the recommended crap fitted ( no guarentees ;( )
Diesel Do
Well-Known Member
mines only gone once
now it's got all the recommended crap fitted ( no guarentees ;( )
Mines never gone
but my alternator caught fire yesterday
Freelaner
Landy Driver
Freelaner
Landy Driver
Hmmmm, was out playing, luckily it started misfiring, was mopping water out of the plug holes and there was two inch flames coming out of the back of it! Brush pack expired
yep great to have a warning
i'll check mine then afore it cremates itself
Freelaner
Landy Driver
Freelaner
Landy Driver
This is from RAVE
Viscous Coupling
The VCU (Viscous Coupling Unit) is a major component of the driveline. It effectively
controls the difference in speed between the front and rear prop shafts and
influences the amount of torque distributed to the front and rear differentials. In
theoretical terms the rear wheels are 0.8% “under driven” in comparison to the front
wheels, however, this figure will change continuously as the vehicle’s speed and
dynamics alter.
The VCU is a sealed unit filled with a silicon fluid material. It comprises an input shaft
and plates, and an output shaft and plates. The plates fitted to both input and output
shafts contain holes through which the silicon fluid is able to pass. The silicon fluid
material offers a resistance to shear. Its effective resistance to shear increases as
the differential in speed, between the input (i.e. front prop shaft) and output (i.e. rear
prop shaft), increases. This characteristic results in the appropriate division of drive
torque between the front and the rear differentials to maximise traction in all
conditions.
In practice, whenever the front or rear wheels start to spin, the difference in speed
between the two prop shaft sections increases. The VCU reacts in these
circumstances, as described. It consequently makes it more difficult for the prop
shafts to revolve at different speeds and thus delivers a greater proportion of the
drive torque to the “non-spinning” differential. The VCU is sealed for life component
and does not require any routine maintenance or servicing, over and above visual
inspection to its external casing.
Viscous Coupling
The VCU (Viscous Coupling Unit) is a major component of the driveline. It effectively
controls the difference in speed between the front and rear prop shafts and
influences the amount of torque distributed to the front and rear differentials. In
theoretical terms the rear wheels are 0.8% “under driven” in comparison to the front
wheels, however, this figure will change continuously as the vehicle’s speed and
dynamics alter.
The VCU is a sealed unit filled with a silicon fluid material. It comprises an input shaft
and plates, and an output shaft and plates. The plates fitted to both input and output
shafts contain holes through which the silicon fluid is able to pass. The silicon fluid
material offers a resistance to shear. Its effective resistance to shear increases as
the differential in speed, between the input (i.e. front prop shaft) and output (i.e. rear
prop shaft), increases. This characteristic results in the appropriate division of drive
torque between the front and the rear differentials to maximise traction in all
conditions.
In practice, whenever the front or rear wheels start to spin, the difference in speed
between the two prop shaft sections increases. The VCU reacts in these
circumstances, as described. It consequently makes it more difficult for the prop
shafts to revolve at different speeds and thus delivers a greater proportion of the
drive torque to the “non-spinning” differential. The VCU is sealed for life component
and does not require any routine maintenance or servicing, over and above visual
inspection to its external casing.
jamesmartin
Well-Known Member
v/c is a good device ,gives less issues in rr were both axles are equally driven
