Locking? viscous centre diff

Need help on this one.
Range Rover from October 1988 thru to 92? have a viscous coupling centre
diff.
Question; is it possible to modify this diff to include a 'manual lock' [as
per 1970 thru to 1988].

I have been informed that you can only modify the later Disco's centre diff
to manual lock. If so, will a later Disco diff bolt into a 1990 RR?
Any forseeable problems?

Any info or where abouts I can obtain would be appreciated.
Thankyou in advance.
John Milburn.

"Milcom Instrumentation" <[email protected]> wrote in message
news:[email protected]...
> Need help on this one.
> Range Rover from October 1988 thru to 92? have a viscous coupling centre
> diff.
> Question; is it possible to modify this diff to include a 'manual lock'
[as
> per 1970 thru to 1988].
>
> I have been informed that you can only modify the later Disco's centre
diff
> to manual lock. If so, will a later Disco diff bolt into a 1990 RR?
> Any forseeable problems?
>
> Any info or where abouts I can obtain would be appreciated.
> Thankyou in advance.
> John Milburn.
>
>

the only mod you could make to a viscous would be replace the fluid with
something solid, like metal, and then it wouldnt be a diff.

Viscous units are clever things, they lock when you need em, and unlock when
you dont. No jiggery pokery, all in the fluid.

Disco's on the other hand have a proper mechanical diff. The early s2
discos had the actuation mechanism removed, as it was deemed that the trac
control would keep it moving, but at the tail end of last year this decision
was changed and the mechanism is back to actuate the diff-lock.

HTH

--
Si
1993 RR Vogue SE
1975 RR burned out shell

"Milcom Instrumentation" <[email protected]> wrote in message
news:[email protected]...
> Need help on this one.
> Range Rover from October 1988 thru to 92? have a viscous coupling
centre
> diff.
> Question; is it possible to modify this diff to include a 'manual
lock' [as
> per 1970 thru to 1988].
>
> I have been informed that you can only modify the later Disco's
centre diff
> to manual lock. If so, will a later Disco diff bolt into a 1990 RR?
> Any forseeable problems?
>
> Any info or where abouts I can obtain would be appreciated.
> Thankyou in advance.
> John Milburn.
>
>

It is not possible to add a lock to a viscous unit nor practical to
convert to a Disco/Defender unit. Neither should it be needed for any
reason that I can fathom. Perhaps you would care to explain the
circumstance which encourages your perception of a need for a lock?

Huw


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Milcom Instrumentation <[email protected]> writes:

>Range Rover from October 1988 thru to 92? have a viscous coupling centre
>diff.
>Question; is it possible to modify this diff to include a 'manual lock' [as
>per 1970 thru to 1988].

Nope.

>I have been informed that you can only modify the later Disco's centre diff
>to manual lock. If so, will a later Disco diff bolt into a 1990 RR?

Doubt it. You _might_ be able to replace the transfer box with a
unit from an earlier RR, but I don't know whether this would
also involve putting in an earlier gearbox.

Can't imagine why you would want to do this.

Pete

--
____________________________________________________________________
Pete Young [email protected]
"Just another crouton, floating on the bouillabaisse of life"

"Pete Young" <[email protected]> wrote in message
news:[email protected]...
Milcom Instrumentation <[email protected]> writes:

>Range Rover from October 1988 thru to 92? have a viscous coupling centre
>diff.
>Question; is it possible to modify this diff to include a 'manual lock' [as
>per 1970 thru to 1988].

Nope.

>I have been informed that you can only modify the later Disco's centre diff
>to manual lock. If so, will a later Disco diff bolt into a 1990 RR?

Doubt it. You _might_ be able to replace the transfer box with a
unit from an earlier RR, but I don't know whether this would
also involve putting in an earlier gearbox.

Can't imagine why you would want to do this.

Pete

Hi Pete,
much discussion took place on this at newsgroup "alt.fan.landrover" on the
25th Aug.

--
____________________________________________________________________
Pete Young [email protected]
"Just another crouton, floating on the bouillabaisse of life"