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View Full Version : 6 speed auto v 8 speed auto



TerryO
18th May 2013, 03:12 PM
Well the new 8 speed auto has been out for quite a few months now, so I was wondering what members on here who have owned a 3.0L six speed D4 think of the 8 speed in comparison? Was the hype about the 8 speed correct?

To keep it relative I think the auto's need to be compared with the same 3.0 engine.

Hopefully there are a few early 3.0 D4 owners out there who have upgraded to the new 8 speed model to make this comparison worthwhile.

Chops
18th May 2013, 04:57 PM
Having worked for an auto trans manufacturer and gone through the transition from 4S to 6S, I'd have to say an 8S would, or should be brilliant. Fuel savings and smoothness should be getting better all the time.
So like you, I'll be interested to see what the "real world" comparison is like.

I can remember as a young lad, we used to say things like "feel it snap into second :twisted:" etc etc etc,, wow, just all so wrong :eek:, which I didn't discover until I started working warranty units, then test driving them.

camel_landy
19th May 2013, 05:00 AM
I prefer the 8spd, especially on the hwy but I find the rotary selector to be pants... I prefer the stick you had with the 6spd!

IMHO - 8spd, stick & paddles would the be best combo.

M

Geedublya
19th May 2013, 05:28 AM
I agree with the above, the two 8 speeds I drove were wonderfully smooth, the dial sucks big time.
My other concern is whether the sump is still the plastic version and whether it can be replaced by a steel version easily.

phl
19th May 2013, 07:34 AM
Having had a 6 speed on extended test drive, and now owning the 8 speed, although the 6 was smooth enough, the 8 is noticeably better.

Personally I actually like the rotary dial, and the fact that it returns to P by itself when you switch the engine off.

Pedro_The_Swift
19th May 2013, 07:53 AM
anyone have the 8 ratio's?

Graeme
19th May 2013, 10:00 AM
and the fact that it returns to P by itself when you switch the engine off.I hope it doesn't do that if the vehicle is still moving, as I've found it less inconvenient to stop and restart the engine on the move to overcome restricted performance.

scarry
19th May 2013, 05:11 PM
Have a look on DISCO3.CO.UK,there are heaps of threads about it.Almost all favour the 8speed.
Fuel efficiency is improved,which is one of the main benefits of the 8speed.

sheerluck
19th May 2013, 05:25 PM
and the fact that it returns to P by itself when you switch the engine off.

I hope it doesn't do that if the vehicle is still moving, as I've found it less inconvenient to stop and restart the engine on the move to overcome restricted performance.

Graeme, I can't think of any circumstance where you would switch the engine off while the vehicle is still moving?

Graeme
19th May 2013, 07:04 PM
I've restarted the engine on the move a couple of times when its inappropriate or undesireable to stop. The procedure is detailed in a US supplement to the D4 handbook. As the brake pedal isn't required to be pressed, the vehicle's software is obviously programmed to cater for it - just be quick about it.

phl
20th May 2013, 10:01 AM
I hope it doesn't do that if the vehicle is still moving, as I've found it less inconvenient to stop and restart the engine on the move to overcome restricted performance.

Can't say I've ever tried stopping the engine whilst moving; from experience, find the loss of power steering and brakes too big a risk.

Also don't forget the dial retracts when you switch off, albeit not immediately.

Celtoid
21st May 2013, 11:18 AM
Can only comment on the Jag I drove with the 8 Speed .... Unbelievably smooth 😃:)