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Old 04-07-2005, 15:01   #1 (permalink)
Chris Glen-Smith
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Help, changing gearbox to manual.

Hi all, I'm a long time lurker and very occasional poster.

I've just had a rush of blood to the head and bought my first landrover
[*1], it's a hybrid, a defender 90 body on a series 3 bulkhead on a
range rover classic chassis. It has a 3.5 V8 Carb engine with LPG and
auto transmission.

The Range rover engine/auto box allows it to cruise comfortably at speed
but has that dead auto feel i.e. bugger all acceleration from
stationary/low speed. (probably conspires with the V8 to quaff fuel like
cheep beer)

Some questions:

I want to change it to a 5 sp manual, hopefully with out lowering the
gearing in top gear (i.e. I don't want to loose that high speed cruise)
Is it posible? Do I have to replace the fly wheel?, what gearboxes will
fit?, do I have to replace the transfer box along with the gearbox? etc....

I am a fan of fuel injection, I've never liked carbs and would like to
get an EFI engine. Is the EFI engine the same block? Can I get a
manifold, plenum (sp?) chamber, ECU, etc.. and bolt it on my block?

That's it for now.

Cheers

[*] my first unless you count the old S2A of my dads I fixed up and
drove to The Gambia on the 03/04 Plymouth Dakar Challenge

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Old 04-07-2005, 15:01   #2 (permalink)
Austin Shackles
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Re: Help, changing gearbox to manual.


On or around Thu, 07 Apr 2005 21:10:53 GMT, Chris Glen-Smith
<chris_d-o-t_my-surname@ntlworld.com> enlightened us thusly:

>The Range rover engine/auto box allows it to cruise comfortably at speed
>but has that dead auto feel i.e. bugger all acceleration from
>stationary/low speed. (probably conspires with the V8 to quaff fuel like
>cheep beer)


Which autobox?

if it's the 4-speed, don't write it off without trying tweaking its kickdown
first... get the setup right and they go well. Try driving it at 50 mph,
and flooring the throttle - it should change down in to 2nd. If it doesn't,
the kickdown isn't set right (or less likely, isn't working internally).

I had a 3.5 V8 plus auto box combo in a 110, and it was great, once I got it
set up right.

as to which will fit, etc...

while the block is pretty much the same chances are it's a different
compression ratio from an injection one.

However, in princple, you can swap all the bits and also get the wiring loom
and ECU. In practice, you're most likely to find all that lot along of an
engine, so you might as well source the complete engine and injection gear
and swap the whole thing, then sell the carb V8 or keep it as a spare.

as to the gearbox/tbox thing - if the transfer box has a difflock position
(high-low lever also moves left-right, as well as back and fore) then it's
an LT230 transfer box and should fit with either the LT77 or R380 5-speed
manual.

If the high-low lever only goes back and forward, you have a Rangie-type
Borg warner T-box, and you'll probably want to swap it for the other sort.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
Appearances: You don't really need make-up. Celebrate your authentic
face by frightening people in the street.
from the Little Book of Complete B***ocks by Alistair Beaton.
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Old 04-07-2005, 17:01   #3 (permalink)
Chris Glen-Smith
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Re: Help, changing gearbox to manual.

Hi, thanks for advice.

It's a 3 speed, if a 4 speed came along I'd try it as I it would be an
easier swap than a manual. What is the likely fuel comsumption hit does
the auto have, I've not yet had a chance to measure my mpg.

The hi/lo lever moves side to side so I guess thats an LT230.

Do you know of a web site with the ratios of the various gearboxes?

Cheers
Chris

Austin Shackles wrote:
> On or around Thu, 07 Apr 2005 21:10:53 GMT, Chris Glen-Smith
> <chris_d-o-t_my-surname@ntlworld.com> enlightened us thusly:
>
>
>>The Range rover engine/auto box allows it to cruise comfortably at speed
>>but has that dead auto feel i.e. bugger all acceleration from
>>stationary/low speed. (probably conspires with the V8 to quaff fuel like
>>cheep beer)

>
>
> Which autobox?
>
> if it's the 4-speed, don't write it off without trying tweaking its kickdown
> first... get the setup right and they go well. Try driving it at 50 mph,
> and flooring the throttle - it should change down in to 2nd. If it doesn't,
> the kickdown isn't set right (or less likely, isn't working internally).
>
> I had a 3.5 V8 plus auto box combo in a 110, and it was great, once I got it
> set up right.
>
> as to which will fit, etc...
>
> while the block is pretty much the same chances are it's a different
> compression ratio from an injection one.
>
> However, in princple, you can swap all the bits and also get the wiring loom
> and ECU. In practice, you're most likely to find all that lot along of an
> engine, so you might as well source the complete engine and injection gear
> and swap the whole thing, then sell the carb V8 or keep it as a spare.
>
> as to the gearbox/tbox thing - if the transfer box has a difflock position
> (high-low lever also moves left-right, as well as back and fore) then it's
> an LT230 transfer box and should fit with either the LT77 or R380 5-speed
> manual.
>
> If the high-low lever only goes back and forward, you have a Rangie-type
> Borg warner T-box, and you'll probably want to swap it for the other sort.
>


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Old 04-08-2005, 01:01   #4 (permalink)
Austin Shackles
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Re: Help, changing gearbox to manual.

On or around Thu, 07 Apr 2005 22:52:29 GMT, Chris Glen-Smith
<chris_d-o-t_my-surname@ntlworld.com> enlightened us thusly:

>It's a 3 speed, if a 4 speed came along I'd try it as I it would be an
>easier swap than a manual. What is the likely fuel comsumption hit does
>the auto have, I've not yet had a chance to measure my mpg.


110 with 4-speed auto on LPG used to get about 11 mpg. By comparison, the
disco with a manual box gets about 13. The disco does about 18 on petrol,
unless you're *very* careful.

both the gas systems are open loop, the disco petrol system is hotwire, but
still open loop.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Festina Lente" (Hasten slowly) Suetonius (c.70-c.140) Augustus, 25
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Old 04-08-2005, 05:01   #5 (permalink)
Mother
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Re: Help, changing gearbox to manual.

On Fri, 08 Apr 2005 08:06:55 +0100, Austin Shackles
<austinNOSPAM@ddol-las.net> wrote:

>110 with 4-speed auto on LPG used to get about 11 mpg.


Crumbs, I get better than that with Grumble...

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Old 04-08-2005, 08:01   #6 (permalink)
Tim Hobbs
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Re: Help, changing gearbox to manual.

On Fri, 08 Apr 2005 12:15:55 +0100, Mother <"@ {m} @"@101fc.net>
wrote:

>On Fri, 08 Apr 2005 08:06:55 +0100, Austin Shackles
><austinNOSPAM@ddol-las.net> wrote:
>
>>110 with 4-speed auto on LPG used to get about 11 mpg.

>
>Crumbs, I get better than that with Grumble...


At our local Jet station, LPG is currently 29.9p against 85.9 for
petrol. I want my Disco back!

By my reckoning you should be getting about 43 mpg by price, assuming
it still does 15mpg on gas.


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70

My Landies? http://www.seriesii.co.uk
Barcoding? http://www.bartec-systems.com
Tony Luckwill web archive at http://www.luckwill.com
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Old 04-08-2005, 08:01   #7 (permalink)
Mother
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Posts: n/a
Re: Help, changing gearbox to manual.

On Fri, 08 Apr 2005 15:17:13 +0100, Tim Hobbs
<tim@101ambulance-urine.net> wrote:

>At our local Jet station, LPG is currently 29.9p against 85.9 for
>petrol.


Kin eck - 39.9p / L ere...

>I want my Disco back!


No problem, you do realise they appreciate in value though, don't you?

>By my reckoning you should be getting about 43 mpg by price, assuming
>it still does 15mpg on gas.


Yeah I reckon so too. Mind, I'm going to replace the leads for some
megnecors and put one of them ignition chip jobbies in too.

If only I could stop the tyre going flat every couple of weeks...
(but then, Grumble does the same with the NSF).

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Old 04-08-2005, 13:01   #8 (permalink)
Lee_D
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Re: Help, changing gearbox to manual.

"Mother" <"@ {m} @"@101fc.net> wrote in message
news:jupc511v27u7dkgt2rvov3quq6333gva59@4ax.com...
> Crumbs, I get better than that with Grumble...


It's all those down hill runs, what with those extra tyres and all that...

not that I'm saying.... ;o)

Lee D
--

www.lrproject.com

Workshop photos from Landrover repairs
& other such tinkerings.
Home of Percy the Jag powered Landrover


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Old 04-08-2005, 15:02   #9 (permalink)
Mother
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Posts: n/a
Re: Help, changing gearbox to manual.

On Fri, 8 Apr 2005 20:39:17 +0100, "Lee_D"
<newsgroupNOSPAM@NOSPAMlrproject.com> wrote:

>not that I'm saying.... ;o)


The gravity of that comment will not be forgotten...

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Old 04-09-2005, 10:02   #10 (permalink)
wayne@lardrover.co.uk
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Re: Help, changing gearbox to manual.

On Fri, 08 Apr 2005 21:33:29 +0100, Mother <"@ {m} @"@101fc.net> made
me spill my meths when he wrote:

>The gravity of that comment will not be forgotten...


You have gravity as well?
--

Wayne Davies, Harrogate 07989 556213

Just another point of view...
www.4x4prejudice.org
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