Gearbox :(

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M

Mark Solesbury

Guest
I must have been a bastard in a previous life....

I have a *horrible* feeling that the gearbox on my 90 is about to die..

Its a LT77 box, and its done 85000 ish miles.


There is a large clonk and when taking up drive in any gear... It never
used the be that loud. There also is quite a lot of play in it when you
back off the accelerator when moving.

I have removed the centre seat, and if you feel the box, its defo coming
from in there...

Question is - How long will it last like this? (There is a knack to
making it not clonk but its hard to do it all the time)

How much will i be looking at for a rekon box fitted?

Bastard.

--
Mark
90 90 200tdi - Fixed :)
87 RR V8 EFI - Sorn'd

http://www.mozilla.com/firefox/ - Firefox Rules!
http://fireftp.mozdev.org/ - FTP Plugin for Firefox
 

Mark Solesbury wrote:
> I must have been a bastard in a previous life....
>
> I have a *horrible* feeling that the gearbox on my 90 is about to die..
>
> Its a LT77 box, and its done 85000 ish miles.
>
>
> There is a large clonk and when taking up drive in any gear... It never
> used the be that loud. There also is quite a lot of play in it when you
> back off the accelerator when moving.
>
> I have removed the centre seat, and if you feel the box, its defo coming
> from in there...
>
> Question is - How long will it last like this? (There is a knack to
> making it not clonk but its hard to do it all the time)
>
> How much will i be looking at for a rekon box fitted?
>
> Bastard.
>
> --
> Mark
> 90 90 200tdi - Fixed :)
> 87 RR V8 EFI - Sorn'd
>
> http://www.mozilla.com/firefox/ - Firefox Rules!
> http://fireftp.mozdev.org/ - FTP Plugin for Firefox

I wouldn't worry too much. If you want to be sure, take the "PTO" cover
off the back of the transfer box and have a look in there. What you are
looking for is where the mainshaft from the main gearbox enters the
splined part of the transfer box gear. There were issues with
lubrication on these splines leading to them being worn thin. The clonk
when you take up drive would be die to movement in here. It's usually
Aa gungy, metally mess in there if it's worn.

However, it's not all doom and gloom, its more that likely worn bushes
or play in the diff or even worn propshaft splines, a little bit of
wear in each of theses components often adds up to a big clonk.

My 90 did it too but I never had any problems with it, my Range Rover
does the same too, and it's now got 138000 miles on it.

Dave

 

> However, it's not all doom and gloom, its more that likely worn bushes
> or play in the diff or even worn propshaft splines, a little bit of
> wear in each of theses components often adds up to a big clonk.
>
> My 90 did it too but I never had any problems with it, my Range Rover
> does the same too, and it's now got 138000 miles on it.
>
> Dave
>

Its got a new prop on the front, and the rear one is in good nick.

The clonk is still there in low and high, diff locked and not.

I dont want it to explode on me! If it does break whats likely to
happen. Cant select gears?

--
Mark
90 90 200tdi - Fixed :)
87 RR V8 EFI - Sorn'd

http://www.mozilla.com/firefox/ - Firefox Rules!
http://fireftp.mozdev.org/ - FTP Plugin for Firefox
 
Mark Solesbury wrote:
> I must have been a bastard in a previous life....
>
> I have a *horrible* feeling that the gearbox on my 90 is about to die..
>
> Its a LT77 box, and its done 85000 ish miles.
>
>
> There is a large clonk and when taking up drive in any gear... It never
> used the be that loud. There also is quite a lot of play in it when you
> back off the accelerator when moving.
>
> I have removed the centre seat, and if you feel the box, its defo coming
> from in there...
>
> Question is - How long will it last like this? (There is a knack to
> making it not clonk but its hard to do it all the time)
>
> How much will i be looking at for a rekon box fitted?
>
> Bastard.
>

Hi Mark, just to let you know I had a similar clonk taking up drive
which turned out to be a worn A-frame ball joint. Very quick
replacement job and no more clonking. Some excellent information here :-

http://www.landyonline.co.za/techtalk/a_frame_ball_joint.htm

Regards,

Dave.
 

Mark Solesbury wrote:
> > However, it's not all doom and gloom, its more that likely worn bushes
> > or play in the diff or even worn propshaft splines, a little bit of
> > wear in each of theses components often adds up to a big clonk.
> >
> > My 90 did it too but I never had any problems with it, my Range Rover
> > does the same too, and it's now got 138000 miles on it.
> >
> > Dave
> >
>
> Its got a new prop on the front, and the rear one is in good nick.
>
> The clonk is still there in low and high, diff locked and not.
>
> I dont want it to explode on me! If it does break whats likely to
> happen. Cant select gears?
>
> --
> Mark
> 90 90 200tdi - Fixed :)
> 87 RR V8 EFI - Sorn'd
>
> http://www.mozilla.com/firefox/ - Firefox Rules!
> http://fireftp.mozdev.org/ - FTP Plugin for Firefox


Yes, you'll just loose drive. The gears will still be selecting as
normal it's just that you will not be able to transmit drive. Like the
transfer box slipping into neutral. Taking the cover off and looking
will take about 20mins so well worth a look

 
Mark Solesbury wrote:

>
>> However, it's not all doom and gloom, its more that likely worn bushes
>> or play in the diff or even worn propshaft splines, a little bit of
>> wear in each of theses components often adds up to a big clonk.
>>
>> My 90 did it too but I never had any problems with it, my Range Rover
>> does the same too, and it's now got 138000 miles on it.
>>
>> Dave
>>
>
> Its got a new prop on the front, and the rear one is in good nick.
>
> The clonk is still there in low and high, diff locked and not.
>
> I dont want it to explode on me! If it does break whats likely to
> happen. Cant select gears?
>

If the clonk indicates wear on the mainshaft splines (and this is a R380
problem not an LT77 one) the failure will simply result in no drive in any
gear. But seriously, I would look for where the free play is - you will be
able to feel it at the gearbox regardless of where it is. If you chock the
vehicle, then jack up one back wheel and have someone rock the wheel back
and forth while you look for where the movement is (handbrake off) you
should be able to track it down. My guess is it will be an accumulation of
small bits of slack. Some of the places likely to have a lot of slack are
the A-frame ball joint, lower link bushes, splines on the drive flanges of
the rear wheels, side play in the rear diff centre, side play in the centre
diff (in both cases wear on the thrust washers on the planet and side
gears). None of these are likely to indicate imminent failure, but any play
in U-joints on either prop shaft should be rectified ASAP, and if there is
excess play in the front axle, suspect a CV joint which should also be
rectified at an early date. Similarly, if you find a lot of play anywhere
in the suspension bushes or ball joint, these should be fixed, not because
they presage some disastrous failure, but because they affect handling.
Hope this helps,
JD
 

"Dave Gibbs" <[email protected]> wrote in message
news:[email protected]...
> Mark Solesbury wrote:
>> I must have been a bastard in a previous life....
>>
>> I have a *horrible* feeling that the gearbox on my 90 is about to die..
>>
>> Its a LT77 box, and its done 85000 ish miles.
>>
>>
>> There is a large clonk and when taking up drive in any gear... It never
>> used the be that loud. There also is quite a lot of play in it when you
>> back off the accelerator when moving.
>>
>> I have removed the centre seat, and if you feel the box, its defo coming
>> from in there...
>>
>> Question is - How long will it last like this? (There is a knack to
>> making it not clonk but its hard to do it all the time)
>>
>> How much will i be looking at for a rekon box fitted?
>>
>> Bastard.
>>
>
> Hi Mark, just to let you know I had a similar clonk taking up drive which
> turned out to be a worn A-frame ball joint. Very quick replacement job
> and no more clonking. Some excellent information here :-
>
> http://www.landyonline.co.za/techtalk/a_frame_ball_joint.htm
>
> Regards,
>
> Dave.

I've heard rumour that if you catch them early enough you can get away with
just putting the transfer gear in this can be done without gearbox removal
(apparantly) so a much easier job! Saying that there is no substitute for
doing it properly.

There is a couple of outfits near me that charge around £500 to remove
overhaul refit, hope this helps

Icky


 

"Mark Solesbury" <[email protected]> wrote in message
news:p[email protected]...
>I must have been a bastard in a previous life....
>
> I have a *horrible* feeling that the gearbox on my 90 is about to die..
>
> Its a LT77 box, and its done 85000 ish miles.
>
>
> There is a large clonk and when taking up drive in any gear... It never
> used the be that loud. There also is quite a lot of play in it when you
> back off the accelerator when moving.
>
> I have removed the centre seat, and if you feel the box, its defo coming
> from in there...
>
> Question is - How long will it last like this? (There is a knack to making
> it not clonk but its hard to do it all the time)
>

The first five years were probably clunk free in mine. The next eighteen
have had an increasing clunk though and I have anticipated a failure for all
that time. It hasn't happened yet. However yours could fail in the next mile
or so ;-)
Don't worry about it. If it fails, it fails. If it doesn't, then great news.
In this case, if it ain't broke then don't fix it. This has stood me well
for eighteen years after all.

Huw


 
On or around Fri, 01 Sep 2006 21:23:40 +1000, JD <[email protected]>
enlightened us thusly:


>If the clonk indicates wear on the mainshaft splines (and this is a R380
>problem not an LT77 one) the failure will simply result in no drive in any
>gear.

I think you mean "and". I rather thought that later R380s were more immune.
all the LT77s suffer, unless they've been worked on.

it'll carry on for some time if you treat it carefully, but eventually, the
splines disappear altogether.

recon box and a cross-drilled T-box gear. cost me about 600 notes for a
recon box for my disco, but they are available cheaper, but possibly not
better - it was a nice smooth one.

fitting depends on who does it. anything from about 100 to 300 notes, as a
guess. LR book time is about 6 hours, but I don't know anyone who can do it
that quick.


--
Austin Shackles. www.ddol-las.net my opinions are just that
"My centre is giving way, my right is in retreat; situation excellent.
I shall attack. - Marshal Foch (1851 - 1929)
 
On or around Fri, 01 Sep 2006 12:54:45 GMT, "icky"
<[email protected]> enlightened us thusly:

>
>"Dave Gibbs" <[email protected]> wrote in message
>news:[email protected]...
>> Mark Solesbury wrote:
>>> I must have been a bastard in a previous life....
>>>
>>> I have a *horrible* feeling that the gearbox on my 90 is about to die..
>>>
>>> Its a LT77 box, and its done 85000 ish miles.
>>>
>>>
>>> There is a large clonk and when taking up drive in any gear... It never
>>> used the be that loud. There also is quite a lot of play in it when you
>>> back off the accelerator when moving.
>>>
>>> I have removed the centre seat, and if you feel the box, its defo coming
>>> from in there...
>>>
>>> Question is - How long will it last like this? (There is a knack to
>>> making it not clonk but its hard to do it all the time)
>>>
>>> How much will i be looking at for a rekon box fitted?
>>>
>>> Bastard.
>>>
>>
>> Hi Mark, just to let you know I had a similar clonk taking up drive which
>> turned out to be a worn A-frame ball joint. Very quick replacement job
>> and no more clonking. Some excellent information here :-
>>
>> http://www.landyonline.co.za/techtalk/a_frame_ball_joint.htm
>>
>> Regards,
>>
>> Dave.
>
>I've heard rumour that if you catch them early enough you can get away with
>just putting the transfer gear in this can be done without gearbox removal
>(apparantly) so a much easier job! Saying that there is no substitute for
>doing it properly.
>
>There is a couple of outfits near me that charge around £500 to remove
>overhaul refit, hope this helps


once it's really clonky, it's too late. Mine had almost no splines left on
either the gear or the shaft.

If you get it *before* it's worn, then you can fix with a cross-drilled
gear.
--
Austin Shackles. www.ddol-las.net my opinions are just that
"My centre is giving way, my right is in retreat; situation excellent.
I shall attack. - Marshal Foch (1851 - 1929)
 

"Austin Shackles" <[email protected]> wrote in message
news:[email protected]...
> On or around Fri, 01 Sep 2006 12:54:45 GMT, "icky"
> <[email protected]> enlightened us thusly:
>
>>
>>"Dave Gibbs" <[email protected]> wrote in message
>>news:[email protected]...
>>> Mark Solesbury wrote:
>>>> I must have been a bastard in a previous life....
>>>>
>>>> I have a *horrible* feeling that the gearbox on my 90 is about to die..
>>>>
>>>> Its a LT77 box, and its done 85000 ish miles.
>>>>
>>>>
>>>> There is a large clonk and when taking up drive in any gear... It never
>>>> used the be that loud. There also is quite a lot of play in it when you
>>>> back off the accelerator when moving.
>>>>
>>>> I have removed the centre seat, and if you feel the box, its defo
>>>> coming
>>>> from in there...
>>>>
>>>> Question is - How long will it last like this? (There is a knack to
>>>> making it not clonk but its hard to do it all the time)
>>>>
>>>> How much will i be looking at for a rekon box fitted?
>>>>
>>>> Bastard.
>>>>
>>>
>>> Hi Mark, just to let you know I had a similar clonk taking up drive
>>> which
>>> turned out to be a worn A-frame ball joint. Very quick replacement job
>>> and no more clonking. Some excellent information here :-
>>>
>>> http://www.landyonline.co.za/techtalk/a_frame_ball_joint.htm
>>>
>>> Regards,
>>>
>>> Dave.
>>
>>I've heard rumour that if you catch them early enough you can get away
>>with
>>just putting the transfer gear in this can be done without gearbox removal
>>(apparantly) so a much easier job! Saying that there is no substitute for
>>doing it properly.
>>
>>There is a couple of outfits near me that charge around £500 to remove
>>overhaul refit, hope this helps
>
>
> once it's really clonky, it's too late. Mine had almost no splines left
> on
> either the gear or the shaft.
>
> If you get it *before* it's worn, then you can fix with a cross-drilled
> gear.

Mines a bit clonky I've had it in bits and it didn't worry me I could hardly
tell it was worn.
Fitted a steve parker oil dribbler under the end plate that should stop it
going further (but I've got a spare g/box squirrled away just in case).
It seems as soon as theres any play at all it starts to clunk, but I've got
smooth gearchanges sussed.
--
Jon


 
On or around Mon, 4 Sep 2006 18:47:53 +0100, "jOn" <[email protected]>
enlightened us thusly:

>>
>> If you get it *before* it's worn, then you can fix with a cross-drilled
>> gear.
>
>Mines a bit clonky I've had it in bits and it didn't worry me I could hardly
>tell it was worn.
>Fitted a steve parker oil dribbler under the end plate that should stop it
>going further (but I've got a spare g/box squirrled away just in case).
>It seems as soon as theres any play at all it starts to clunk, but I've got
>smooth gearchanges sussed.

Mine was clonky when I bought it and did about 30K miles before I actually
did anything with it. There's clonks and clonks, though - some are
built-in, and I've yet to see *any* LR that isn't a bit clonky, there's just
too many gears all with a bit of lash in 'em, plus all the prop joints,
diffs and CV joints and hub splines...
--
Austin Shackles. www.ddol-las.net my opinions are just that
"You praise the firm restraint with which they write -_
I'm with you there, of course: They use the snaffle and the bit
alright, but where's the bloody horse? - Roy Campbell (1902-1957)
 
Austin Shackles wrote:

> On or around Mon, 4 Sep 2006 18:47:53 +0100, "jOn" <[email protected]>
> enlightened us thusly:
>
>
>>>If you get it *before* it's worn, then you can fix with a cross-drilled
>>>gear.
>>
>>Mines a bit clonky I've had it in bits and it didn't worry me I could hardly
>>tell it was worn.
>>Fitted a steve parker oil dribbler under the end plate that should stop it
>>going further (but I've got a spare g/box squirrled away just in case).
>>It seems as soon as theres any play at all it starts to clunk, but I've got
>>smooth gearchanges sussed.
>
>
> Mine was clonky when I bought it and did about 30K miles before I actually
> did anything with it. There's clonks and clonks, though - some are
> built-in, and I've yet to see *any* LR that isn't a bit clonky, there's just
> too many gears all with a bit of lash in 'em, plus all the prop joints,
> diffs and CV joints and hub splines...

Amplifying that a little.... Don't assume that because you have a
clonk that you have a problem. Most importantly don't assume that if a
particular unit has free play that it is the source of the problem. As
previously mentioned the ball joint over the rear axle can be a good
clonk generator as are the propshaft UJs but both are very easily
diagnosed.

Most of the the clonking can be controlled with delicate footwork.
 
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