On or around Tue, 20 Jun 2006 10:57:00 +0100, "William Tasso"
<
[email protected]> enlightened us thusly:
>On Mon, 19 Jun 2006 18:56:58 +0100, Austin Shackles
><[email protected]> wrote:
>
>> On or around Mon, 19 Jun 2006 11:58:35 +0100, "William Tasso"
>> <[email protected]> enlightened us thusly:
>>
>>> Greetings
>>>
>>> I'm taking a look at a couple of V8 Discoveries this week. All early
>>> 90s
>>> (J/K plates) and all at/over 100k mileage.
>>>
>>> Any idea of value would be apprciated, along with any particular (not
>>> immediately obvious) faults to look out for.
>>
>>
>> gearbox output shaft
>
>how is that identified?
clunks from centre of vehicle on changing gear, or when going from over-run
to power. possible tests include pull off forwards, stop, engage reverse,
move off backwards; also you can try being in 2nd or 3rd, lift off then
apply boot rather smartly. You're listening for a mechanical noise
somewhere between a clank and a clunk under any of those conditions. Trouble
is, they all clunk a bit, but a badly worn one clunks a lot. clankyclunky
gearchange when hustling up through the gears is another giveaway - a fast
gearchange from 2nd to third often shows it up.
If you reckon it's afflicted thus, you're looking for a grand off the price
or walk away, 'cos that's how much it costs to fix it decently, more or
less. Minimum is new main box output shaft and new transfer box input gear
- plus of course remove box, split boxes, part-strip main box, re-assemble
and replace. The easier option is fit a recon main box and a new t-box
gear, which is probably not all that much more money.
Don't believe anyone who says "oh, you only need to replace the gear", IME
the wear occurs equally on both sets of splines - on the one I replaced,
which was still driving but obviously clankyclunky, the splines on both
parts were over 50% worn away, and before long they'd have failed completely
and left it with no drive.
The magic words you want the vendor to speak (and it's a good idea to ask
without prompting) are, in addition to "new shaft" or "recon gearbox",
"cross-drilled gear" - this is the definitive mod to cure the problem,
introduced somewhere around M/N reg on discos, soon after the beginning of
the R380 box - all LT77 boxes are prone to it (but autos of the same vintage
apparently are not). LT77 boxes have reverse left-and-forward, R380s have
it right-and-back, opposite 5th.
>
>> tired engines. properly looked after the V8 will last
>> that long, but many are 50% shagged or more.
>
>for sure - thanks.
not that easy to spot, unfortunately. listen to exhaust at idle, down the
other end of the pipe, it should sound nice and even, and it should go
reasonably well if booted. If it seems gutless or idles unevenly, I'd be
suspicious. The principal failure point is the camshaft on neglected
engines, along with general top-end wear to the valve gear; while these
things can be fixed with the engine in the vehicle, the parts are a couple
of hundred or more and several hours' labour...
--
Austin Shackles.
www.ddol-las.net my opinions are just that
"There is plenty of time to win this game, and to thrash the Spaniards
too" Sir Francis Drake (1540? - 1596) Attr. saying when the Armarda was
sighted, 20th July 1588
