GWYN LEWIS 4x4

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1 x Heavy Duty 1310 Double Cardan Ultra Extreme Wide Angle Propshaft.

Manufacturer :- Firow Custom built Exclusively for Gwyn Lewis 4×4 to our own very specific specifications. Not to be confused with other similar looking propshafts available elsewhere.

Fits :- Defender 90/110/130 300tdi, TD5, Front Propshaft.
Fits :- Discovery 1, 200/300tdi, Front Propshaft.
Fits :- Discovery 2 td5, but will require a Defender transfer box flange, Front Propshaft.
Fits :- Range Rover Classic 200/300tdi with LT230 transfer box, Front Propshaft.

Part Number :- GL-DC-EXT-600

We also stock BLACK part number GL-DC-EXT-600-BLACK

Working length :- 637mm + -
Weight :- 13.4KG

These HEAVY DUTY 1310 Double Cardan wide angle propshafts are custom made for us to our specifications. This version has the superior Italian Double Cardan unit with the slider built into the Double Cardan end. The Double Cardan end goes up to the gearbox/transfer box which means the slider is out of the mud and water. These fit straight onto a Defender style transfer box flange you will not require a Discovery 2 Transfer Box Flange to fit this one.

For those looking for our strongest prop shafts please see more info on our 2020 MEGA propshafts. These are for extreme use off-roaders with large aggressive tyres and upgraded driveline.

These propshafts are made to a very high standard, please don’t compare these to cheap import ones.

Fitting advice :-
Please note these propshafts have heavy-duty round flanges, when fitting make sure you clean up all flange faces as they should not sit on top of dirt or rust.
Brush grease onto flange faces this will help prevent rust.
The Double Cardan end bolts onto the transfer box flange.
You must ensure all UJs and the slider are fully greased on fitment and are regularly greased during use.
After greasing cap greased joints, you must make sure the grease nipple does not allow grease to leak back, they must seal after greasing. If you have dirt in there, they will not seal. If this is the case the grease nipple must be replaced or capped with our plug.
Always make sure your propshaft can still turn with your axle at full suspension drop out, long-travel suspension can allow the axle to drop down too far causing the joints to bind and break.

This propshaft has 3 fully greaseable UJs, and the slider is also greaseable.

Why Fit a Double Cardan propshaft
A Double Cardan propshaft is used mainly to help reduce propshaft vibrations on lifted vehicles where running angles have become steeper.
The Double Cardan end is fitted to the gearbox as this is normally the steepest angle.
Although these propshafts are 30/40 degree wide angle, no propshaft should be run with a steeper angle of 5 degrees as this causes premature universal joint wear, especially when used on road as they overheat.
By fitting a Double Cardan propshaft you have 2 universal joints at the Double Cardan end which reduces the joint angle by 1/2 making them last longer compared to a single joint on a normal propshaft.
Between the 2 joints, there is a ball and cup that holds the 2 joints together, again with suspension lifts these can overheat and wear out quicker.

They feature

  • Double Cardon propshafts are used to help reduce propshaft vibrations on lifted vehicles, especially after caster correction.
  • Slip joint is at the Double Cardan end out of the mud and water.
  • 30 degree wide angle to prevent the propshaft binding up on long travel suspension.
  • 40 degree wide angle on the Double Cardan end.
  • Heavy Duty Round Flange Face (not the old square type), that bolts to gearbox and diff 79.4mm PCD.
  • This version has the superior Italian Double Cardon end with slip joint built into the D/C end.
  • Higher torque capacity than a standard Land Rover propshaft, using 60mm heavy duty high torque tube.
  • Td5 Discovery 2 transfer box flange is not required to fit this one.
  • Heavy duty 1310 series Universal Joints (27mm x 81.8mm) with nylon thrust washers and metal/rubber seals, the nylon thrust washers also has a cross in them to allow grease to get to each cup when greasing them.
  • Rilsan coated spline for smother operation and helps eliminate vibrations.
  • Upgraded involute spline configuration with 18 splines that is also GREASEABLE which is a feature only found on our propshafts.
  • Internally plug welded to hold grease in the slider.
  • Double seal arangement on the slip assembly, with 110mm of movement and full spline contact on the male and female slider to help with long travel suspension.
  • Phased when required to reduce vibrations.
  • All prop shafts come with a tube of k48 grease.

Propshaft Wear:-
Propshaft universal joint wear and vibration is a problem on Land Rover vehicles, on lifted vehicles, this can be more of a problem as it steepens propshaft Universal Joint working angles to the point where they overheat and vibration problems can become an issue. Caster Correction also steepens UJ working angles so can cause more vibration and overheating problems, even lowered Defenders can suffer from vibration issues.
 No prop shaft should be run for long periods with a steeper running angle of more than 5 degrees, anything above this angle used for long journeys will cause the UJs to overheat, the grease will dry up and cause premature wear. This is always a problem with Land Rovers. For example, if you are driving at 50mph at 2000RPM the propshaft is revolving 2000 times every 1 minute, the steeper the angle the faster the needles are revolving in the caps, this is why they overheat, on a Double Cardan at these speeds the ball in-between the 2 joints is also working hard and getting hot, eventually, it will cause the rubber boot over the ball to fail.

Vibration:-
Vibrations are normally felt on overrun, around 50mph where you are not accelerating or engine braking, the whole transmission is “slack” on overrun.
The centre diff inside the transfer box can “rattle” around at this point, both output drive flanges are only supported by outer bearings and the inner shafts just slide into the centre differential. There is always some play in the shafts and gears you then feel some play (Up Lift) in the outer drive flanges as the shaft pivots on the bearing, this then causes the flanges to rotate out of shape. These are all unbalanced parts and can themselves be the cause of transmission vibrations, sometimes I have seen fitting an imbalanced propshaft can cure vibrations as it balances out the transfer box imbalance.

Double Cardan:-
A Double Cardan propshaft is often successful in helping to solve these vibration problems but it is not a true cure, it can hide the problem to the point where it is not noticed or becomes bearable.
A Double Cardan propshaft has two UJs at the Double Cardan end, between the two joints there is a ball and cup that holds the two joints together, this is positioned at the front transfer box flange (where the steepest working angle is on all Land Rovers). These two UJs together halve the angle at the transfer box, halving that angle helps to reduce wear and vibration problems caused by steep running angles, however, the ball and rubber boot in-between the two joints may also overheat and wear out as it is under more strain, if the rubber boot over the ball is showing signs of cracking or leaking grease it needs replacing before the ball is worn out.

Wide Angle:-
A Wide Angle propshaft alone is not always enough to help with vibration problems. A good quality Wide Angle propshaft can be enough to solve some vibration problems however the UJ’s are still working at the same angle as a standard propshaft.
A Wide Angle propshaft can turn through a wider angle before yokes bind, this is to accommodate long-travel suspension movements (axle drop out) off-road, it does not mean that the propshaft can be run at steep angles on road. UJ’s will wear quicker when run at steep angles. Ideally for road work UJ’s should be running between 2 to 5 degrees, beyond 5 degrees UJs will overheat causing quicker wear and vibrations can become an issue.

Our propshafts, Wide Angle and Double Cardan, are made with long slip sliders to accommodate long-travel suspension. A propshaft spacer should NEVER be used for any reason. By adding a spacer, you will cause damage to your driveline if your propshaft can not close up enough.

Please note that propshaft UJ`s on lifted vehicles are under more strain and require REGULAR GREASING to help prolong their life.

Ensure your capped greased joint does not allow grease to leak back from the grease nipple they must seal after greasing. If you have dirt in there, they will not seal. If this is the case the grease nipple must be replaced or capped with our plug.

We can also make non-standard custom length props.
If you are unsure what you need please contact me.

Items are normally sent out same day or next working day.

Any questions please contact us.

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