Thank you very much for the explanation. Can the car be ordered that way or has the axle to be modified afterwards? And how much would that cost?
I don't know how much it would cost to have a 3.7 diff converted to 4.11. In theory it's quite straightforward, as it should be just a question of changing the 10-tooth pinion on the input shaft for an 11-tooth : The crown wheel stays the same at 41 teeth, giving the higher ratio (41/11 = 3.73) as opposed to 41/10 = 4.1.
Having said that, if you were going to go down this route I would heartily recommend having the differential itself replaced with a Quaife torque-biasing unit, with these you get all the advantages of a limited-slip differential without any of the disadvantages of a locking arrangement. I had this done to my 4/4 and it has transformed the ability to get power down effectively.
The Quaife torque-biasing unit, with these you get all the advantages of a limited-slip differential without any of the disadvantages of a locking arrangement.
Not true.
The Quaife does not work as a true LSD as Quaife is a torque-biasing unit. So if there is no Torque to a wheel i.e. you lift a wheel, hit water, gravel with one wheel or even grass, ice it does not Bias so is not working to keep both wheels powering forward motion.
The Quaife is very good for a flat smooth race track and does not reacquire maintenance and is not adjustable more suited to a front wheel drive car as it does not snatch.
The LSD.
Works with friction plates. with a preset ramp (springs) which can be set (changed) to suit your driving style and road, rally or race.
It still works on loose gravel, mud, ice, water and gives constant power to both wheels.
To give an extreme example, You park half on a wet verge a front wheel drops into a dip your rear wheel on the grass spins the one on the road does Fanny Addams thats an open diff or a quaife. The LSD the grass wheel does not spin as the LSD transfers power 'drive' to the tarmac wheel so both turn, and you drive off.
So as for reliability the LSD needs regular oil changes of the correct spec, Friction plates will need to be changed when worn road use about 60,000.
I would defiantly put an LSD in as well, because it will transform the driving experience and ensure more traction off the line and round corners, but I'll go for a stock BTR LSD or even better a Gripper LSD or Titan LSD.
Cain
