Thread: Discovery 5

Here's an article

http://blogs.wsj.com/drivers-seat/20...transmissions/

And another

http://www.caradvice.com.au/455953/2...urface-online/

ZF already do 10, 12 & 16 speed Automatics for buses - the tech is maturing to suit passenger vehicles..

Originally Posted by Tombie

Who said TC and Brakes?

There's 10 and 12 speed transmissions in the wings now with a complete cross over...

Look at your current Dual range box..

1L
2L
3L = 1H
4L = 2H
5L = 3H
6L = 4H
... = 5H
... = 6H
... = 7H
... = 8H

**Roughly

So a new generation 10/12 speed can easily cover the spectrum, with less weight, less frictional losses etc...

I'd be all for a straight 12 speed gearbox,8 speed on road with bottom 4 lock-out in the new Defender. Pat

Originally Posted by PAT303

I'd be all for a straight 12 speed gearbox,8 speed on road with bottom 4 lock-out in the new Defender. Pat

That is forward gears,

Low range is pretty handy in reverse at times....

Maybe 2 reverse ratios as well?

It would need a reverse idler to have reverse,nothing says it couldn't be used in any gear. Pat

My main tractor has a 16-speed box with reverse restricted to 3-11. 5th is the default starting gear after start-up but only drops to 10th when stopped from a higher gear. No torque converter though, only clutches.

I think JLR half heartedly aimed for this in the DS and Evoque with the 9 speed ZF. 1st gear doesn't get used generally.

Originally Posted by scarry

That is forward gears,

Low range is pretty handy in reverse at times....

Maybe 2 reverse ratios as well?

Whats wrong with having a single reverse gear that would be comparable to our current normal reverse with low? How many times to you need to go fast in reverse that having it super low would be restricitve?

Originally Posted by Tombie

Read back - you actually confirmed my point - when you said 10 or so speed box..

My post prior to that said to not discount the new tech (being the development of the 10/12 speed auto boxes) to which you assumed Torque converters and braking systems

Lol. Yes I missed the mention of 12 speed boxes under development in your previous post in a discussion about currently available technology, my bad... some day soon we'll be going to Mars for our holidays too, but we aren't yet. When the day comes I'll be on board. But back in the real world, as much as single range boxes need more respect for what they can can do I'd be stumping for the dual range D5...