V8 Auto Gearbox Query

Picked up another Disco today, a '93 K 3.5 V8i Auto. Drove back from Notts
to Yorks and it felt really good smooth changes, purring V8, one or two
clunks when dropping from 4th to 3rd at around 50mph but I put it down to
the fact that the car has been stood for 3 months. Then as I am 100 yds from
home I slow from 40 to around 25 to take a left and a big clunk from the
autobox as it changes down and it kills the engine! Re-started and it
struggled a bit around the next two bends until I got home. Any ideas what
it could be please? Seemed to run sweet as a nut until this.

Andy

"Andy" <[email protected]> wrote in message
news:[email protected]...
: Picked up another Disco today, a '93 K 3.5 V8i Auto. Drove back from Notts
: to Yorks and it felt really good smooth changes, purring V8, one or two
: clunks when dropping from 4th to 3rd at around 50mph but I put it down to
: the fact that the car has been stood for 3 months. Then as I am 100 yds
from
: home I slow from 40 to around 25 to take a left and a big clunk from the
: autobox as it changes down and it kills the engine! Re-started and it
: struggled a bit around the next two bends until I got home. Any ideas what
: it could be please? Seemed to run sweet as a nut until this.
:
: Andy

Hi Andy,

have you checked all the obvious bits - fluids etc?

mine had a wibble at low speeds caused by the stepper motor not doing its
job properly cos it was all caked up in soot

When you say struggled - engine struggling or gearbox?

Si

"GrnOval" <[email protected]> wrote in message
news:[email protected]...
>
> "Andy" <[email protected]> wrote in message
> news:[email protected]...
> : Picked up another Disco today, a '93 K 3.5 V8i Auto. Drove back from
> Notts
> : to Yorks and it felt really good smooth changes, purring V8, one or two
> : clunks when dropping from 4th to 3rd at around 50mph but I put it down
> to
> : the fact that the car has been stood for 3 months. Then as I am 100 yds
> from
> : home I slow from 40 to around 25 to take a left and a big clunk from the
> : autobox as it changes down and it kills the engine! Re-started and it
> : struggled a bit around the next two bends until I got home. Any ideas
> what
> : it could be please? Seemed to run sweet as a nut until this.
> :
> : Andy
>
> Hi Andy,
>
> have you checked all the obvious bits - fluids etc?
>
> mine had a wibble at low speeds caused by the stepper motor not doing its
> job properly cos it was all caked up in soot
>
> When you say struggled - engine struggling or gearbox?
>
> Si
>

Not checked a thing as it was dark and I don't know my way around the motor
yet. Think the gearbox was struggling but the engine was nearly stalling so
not sure if it was the chicken or the egg!

Andy wrote:
> "GrnOval" <[email protected]> wrote in
> message news:[email protected]...
>>
>> "Andy" <[email protected]> wrote in message
>> news:[email protected]...
>>> Picked up another Disco today, a '93 K 3.5 V8i Auto. Drove back
>>> from Notts to Yorks and it felt really good smooth changes,
>>> purring V8, one or two clunks when dropping from 4th to 3rd at
>>> around 50mph but I put it down to the fact that the car has been
>>> stood for 3 months. Then as I am 100 yds from home I slow from 40
>>> to around 25 to take a left and a big clunk from the autobox as it
>>> changes down and it kills the engine! Re-started and it struggled
>>> a bit around the next two bends until I got home. Any ideas what
>>> it could be please? Seemed to run sweet as a nut until this. Andy
>>
>> Hi Andy,
>>
>> have you checked all the obvious bits - fluids etc?
>>
>> mine had a wibble at low speeds caused by the stepper motor not
>> doing its job properly cos it was all caked up in soot
>>
>> When you say struggled - engine struggling or gearbox?
>>
>> Si
>>
>
> Not checked a thing as it was dark and I don't know my way around
> the motor yet. Think the gearbox was struggling but the engine was
> nearly stalling so not sure if it was the chicken or the egg!

Drop it round tomorrow night, we'll have a look if you want. 6pm would be good.

--
Ta!

Nige

Subaru WRX (54)
Land Rover 101 GS/Ambi (Morph)
KTM 520 SX

Sounds a bit like transmission wind up to me. Jack up a wheel, let it
down, then take for a drive again. See if the symptoms have gone.
If they do then suspect the centre diff lock is engaged.

MW

Nige wrote:
> Andy wrote:
> > "GrnOval" <[email protected]> wrote in
> > message news:[email protected]...
> >>
> >> "Andy" <[email protected]> wrote in message
> >> news:[email protected]...
> >>> Picked up another Disco today, a '93 K 3.5 V8i Auto. Drove back
> >>> from Notts to Yorks and it felt really good smooth changes,
> >>> purring V8, one or two clunks when dropping from 4th to 3rd at
> >>> around 50mph but I put it down to the fact that the car has been
> >>> stood for 3 months. Then as I am 100 yds from home I slow from 40
> >>> to around 25 to take a left and a big clunk from the autobox as it
> >>> changes down and it kills the engine! Re-started and it struggled
> >>> a bit around the next two bends until I got home. Any ideas what
> >>> it could be please? Seemed to run sweet as a nut until this. Andy
> >>
> >> Hi Andy,
> >>
> >> have you checked all the obvious bits - fluids etc?
> >>
> >> mine had a wibble at low speeds caused by the stepper motor not
> >> doing its job properly cos it was all caked up in soot
> >>
> >> When you say struggled - engine struggling or gearbox?
> >>
> >> Si
> >>
> >
> > Not checked a thing as it was dark and I don't know my way around
> > the motor yet. Think the gearbox was struggling but the engine was
> > nearly stalling so not sure if it was the chicken or the egg!
>
> Drop it round tomorrow night, we'll have a look if you want. 6pm would be good.
>
> --
> Ta!
>
> Nige
>
> Subaru WRX (54)
> Land Rover 101 GS/Ambi (Morph)
> KTM 520 SX

"mike whiskey" <[email protected]> wrote in message
news:[email protected]...
> Sounds a bit like transmission wind up to me. Jack up a wheel, let it
> down, then take for a drive again. See if the symptoms have gone.
> If they do then suspect the centre diff lock is engaged.
>
> MW
>
>

I have a funny feeling that you could be right, the diff-lock light took a
while to go out after I tested it, could have been a bit of wind-up there.
I'll see if it does it again.

On or around Tue, 14 Nov 2006 09:00:42 -0000, "Andy"
<[email protected]> enlightened us thusly:

>
>"mike whiskey" <[email protected]> wrote in message
>news:[email protected]...
>> Sounds a bit like transmission wind up to me. Jack up a wheel, let it
>> down, then take for a drive again. See if the symptoms have gone.
>> If they do then suspect the centre diff lock is engaged.
>>
>> MW
>>
>>
>
>I have a funny feeling that you could be right, the diff-lock light took a
>while to go out after I tested it, could have been a bit of wind-up there.
>I'll see if it does it again.
>
sometimes you need to reverse it.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Blue: The sky is blue for a reason. Blue light is a source of strength
and harmony in the cosmos. Create a blue light in your life by
telephoning the police
from the Little Book of Complete B***ocks by Alistair Beaton.

"Austin Shackles" <[email protected]> wrote in message
news:[email protected]...
> On or around Tue, 14 Nov 2006 09:00:42 -0000, "Andy"
> <[email protected]> enlightened us thusly:
>
>>
>>"mike whiskey" <[email protected]> wrote in message
>>news:[email protected]...
>>> Sounds a bit like transmission wind up to me. Jack up a wheel, let it
>>> down, then take for a drive again. See if the symptoms have gone.
>>> If they do then suspect the centre diff lock is engaged.
>>>
>>> MW
>>>
>>>
>>
>>I have a funny feeling that you could be right, the diff-lock light took a
>>while to go out after I tested it, could have been a bit of wind-up there.
>>I'll see if it does it again.
>>
> sometimes you need to reverse it.
> --

I had to reverse a fair bit and turn it too, would have thought any wind-up
would have gone after a 100 mile trip but there weren't many corners!!

On 2006-11-14, Andy <[email protected]> wrote:

> I had to reverse a fair bit and turn it too, would have thought any wind-up
> would have gone after a 100 mile trip but there weren't many corners!!

Once the diff is unlocked, that's all your wind-up gone, it winds up
when the diff is locked. So unless your diff lock light went out but
the diff remained locked then it shouldn't be wind-up.

--
Blast off and strike the evil Bydo empire!

In message <[email protected]>, Ian Rawlings
<[email protected]> writes
>On 2006-11-14, Andy <[email protected]> wrote:
>
>> I had to reverse a fair bit and turn it too, would have thought any wind-up
>> would have gone after a 100 mile trip but there weren't many corners!!
>
>Once the diff is unlocked, that's all your wind-up gone, it winds up
>when the diff is locked. So unless your diff lock light went out but
>the diff remained locked then it shouldn't be wind-up.
>
And regardless of corners it would have almost certainly have gone bang
long before 100 miles - believe me I've been there.

The only thing affected by corners are the axle diffs.
--
hugh
Reply to address is valid at the time of posting

> The only thing affected by corners are the axle diffs.


Not true as the rear axle travels a shorter distance that the front when
going round a corner forwards.

"Nick" <[email protected]> wrote in message
news[email protected]...
>
>> The only thing affected by corners are the axle diffs.
>
>
> Not true as the rear axle travels a shorter distance that the front when
> going round a corner forwards.
>

Ruled out a sticky centre diff, tested it on some gravel and the rear wheel
drags when cornering with d/l in and runs fine with d/l out. Must have been
a glitch as it hasn't happened since.