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That's a damn good question, and something I wondered about myself.Quote:
Originally Posted by Gregz
"Control the difference" in practice just means accepting more clutch slipping, heating and wear in preference to tyre slip on the ground. It could certainly make for more sensible on-road high-range torque splits but I'm unsure whether it would be better or worse for low-range off-road contexts.
I wish JLR would give us some proper technical insight into what they've built.
Absolutely!Quote:
Originally Posted by TB
It is fundamental to answering the question I asked in the beginning. Until the engineering department at JLR puts its cards on the table apart from us seeing a vague diagram published on DEFENDER2.com then as they say "the jury is still out"
My guess is absolutely not! The old centre diff isn't "locked" unless driving in a straight line and I expect the LR have done the same with the new arrangement.Quote:
Originally Posted by Gregz
This is from the MY21 RRS Press kit( seems slightly similar to the Defer to me, but I note the term "bevel gear centre differential", whatever that is, that might distinguish it from the Defer set-up)
Press kits for the Defer and Disco had even less info. :
Alongside the suite of electronic all-terrain technologies, the Range Rover Sport’s four-wheel-drive capability is managed by a transfer case design. This has a smart actuator in place of a separate motor and ECU, resulting in a 1.5kg weight reduction. It is controlled through a multi-plate clutch. Together with the bevel gear centre differential it provides a 50:50 torque split.
The clutch uses wheel slip information from a range of sensors to distribute torque evenly between all four wheels, while a ‘shift on the move’ system allows drivers to switch between high and low gears at up to 60km/h (37mph). The Active Rear Locking Differential can also be optimised for cornering stability and traction.
A bevel gear differential is the traditional kind. Easy to discover with a quick web search.
I am interested to know where this difference has been listed for the MY22 models. All I can see for engine selection is the same description regardless of the engine model selected which states (Automatic) All Wheel Drive in the online selector and in the downloaded selection information from landrover.com.au
Can someone provide a link which shows the original clarification
thanks
Agree. They wouldn’t want to be slipping it for extended periods when they want it in the equivalent of “locked”.Quote:
Originally Posted by Graeme
"It gets curiouser and curiouser" said Alice (in wonderland).Quote:
Originally Posted by Sweetpea
As the originator of this topic I raised it because when I did a "build you own" it came up as a footnote which I cut and pasted...so I went looking for it to answer your request.
Now it seems not to be the case. A rebuild doesn't declare this.
So what is going on? Is this a storm in a tea cup or JLR hiding something or did I dream it?
The iGuide documentation for 22MY Defender includes a section on "All Wheel Drive (AWD)" that states:
RWD is only possible in the new driveline arrangement we've been discussing. So not a figment of your imagination.Quote:
The AWD system automatically varies the status between AWD and Rear Wheel Drive (RWD) to suit the current driving style and prevailing conditions.
So is it like old school,RWD,but FWD instead of operated by the driver with a lever,is operated by a clutch that is electric,signal coming from an ECU?
No center differential at all?
And driver cannot change from AWD to RWD,or visa versa,it is done automatically?
But driver can change different TR modes,and high and low range,that may determine when FWD occurs.