Ticking 5th gear (when disengaging)

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Fred Labrosse - 25 Apr 2005 10:47 GMT

All,

When I disengage the 5th gear, I can hear a single "tick" noise. This is on
a 110 TD5. It only happens from the 5th gear, when the stick goes from
facing the 5th gear (between 5th and reverse) back to middle position:

(best viewed in monospace ;-)

1 3 5

| | |
|---|-x-|
| | |

2 4 R

where marked with the 'x', again only when comming from 5th.

At first, I thought it was some linkage catching something when engaging 5th
and then releasing it (it's loud enough to be heard from within the car
while driving), but after having a look at it (or rather at the workshop
manual as nothing is visible from under the car), it is clearly not
possible since the gear stick goes directly in the gear box.

Has anybody had that? Should I worry? Any suggestions?

TIA,

Fred

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Jeremy Mortimer - 25 Apr 2005 10:59 GMT

> All,
>
> When I disengage the 5th gear, I can hear a single "tick" noise. This
> is on a 110 TD5. It only happens from the 5th gear, when the stick
> goes from facing the 5th gear (between 5th and reverse) back to middle
> position:

...

> Has anybody had that? Should I worry? Any suggestions?
>
> TIA,
>
> Fred

I've noticed this in our 2004 Discovery TD5. Is it the same gearbox?

Jeremy

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Martin Lewis - 25 Apr 2005 11:42 GMT

>> All,
>>
[quoted text clipped - 14 lines]
>
> Jeremy

It's absolutely normal - it's the reverse gear selection inhibit
disengaging.

There's a lockout in the box (R380 - same on the Disco and Defender BTW)
which stops you doing a 5th-to-reverse change. When you move out of 5th to
the middle position it unlocks to allow access to reverse, and giving the
audible click.

Martin

Signature

1988 90 Td5 Converted NAS Replica
www.web-rover.co.uk

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Fred Labrosse - 25 Apr 2005 12:00 GMT

>>> All,
>>>
[quoted text clipped - 22 lines]
> the middle position it unlocks to allow access to reverse, and giving the
> audible click.

Many thanks for the explanation.

Fred

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Austin Shackles - 25 Apr 2005 13:13 GMT

>It's absolutely normal - it's the reverse gear selection inhibit
>disengaging.
[quoted text clipped - 3 lines]
>the middle position it unlocks to allow access to reverse, and giving the
>audible click.

quite so; the time you have to worry is if it doesn't do it.

came in at the same time as synchromesh on reverse... presumably, in theory,
it is actually possible to get reverse from 5th - although I recon you'd
have to try quite hard. 'course, the consequences would be impressive.

on a non-synchro, such as mine, I seriously doubt it's possible to engage
reverse at 5ht-gear type speeds, certainly you wouldn't do it without
noticing :-)

Signature

Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Pereant qui ante nos nostra dixerunt"
(confound the men who have made our remarks before us.)
Aelius Donatus (4th Cent.) [St. Jerome, Commentary on Ecclesiastes]

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Hirsty's - 25 Apr 2005 16:55 GMT

Ball bearing interlock to stop inadvertant engaging of reverse and
consequent wheel spin in reverse/ lack of control/ bang.
XJS owner had a problem years ago when doing high speed on motorway and
engaged reverse by mistake. ( killed himself in ensuing carnage )

> All,
>
[quoted text clipped - 23 lines]
>
> Fred

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