MOTORCYCLE

> On Thu, 28 Jun 2007 11:38:52 GMT, platypus
> wrote:
>
>> Ace wrote:
>>> On Thu, 28 Jun 2007 04:09:17 -0700, darsy wrote:
>
>>>> The Jeep has several drive modes, but only recommends 2wd or
>>>> permanent 4wd for road use - part-time 4WD is for loose surfaces
>>>> only. Ive no idea why - Krusty probably does, mind.
>>>
>>> So do I. Its because your 4wd system is much more mechanical than
>>> mine, such that the front and rear wheels will want to move at the
>>> same speed all the time, so going round corners will be much more of
>>> an effort, as youre effectively skidding at least one of the rear
>>> tyres round to follow the front. Tyre wear will be accordingly
>>> increased.
>>
>> Err, diffs?
>
> They work between left and right side, but on vehicles with selectable
> 4wd like darsys jeep, there is no diff between front and rear.

> On mine, the whole front-rear transmission split is through a
> semi-viscous coupling, which is essentially a hydraulic diff, so it
> can cope quite happily with slightly different front and rear wheel
> speeds, as can any modern road-based vehicle with permanent 4wd.