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jonesie



Member Since: 25 Sep 2011
Location: Petworth
Posts: 231

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Corris Grey
Transfer conversion Vs Overdrive
I am looking to either upgrade the transfer gears with an Ashcroft conversion or fit an overdrive on my Td5,
I spend most of my day reaching for sixth!
I appreciate it would be cheaper to go the Ashcroft route (just,) especially if I did the work myself but I am wondering if in the long term the overdrive would prove cheaper with greater economy.
I have got a Fairey fitted to the series I and it is great giving you another set of gears effectively so I can see the advantages with a Td5
So Td5 people what do you think is the best option?
Post #98553 7th Nov 2011 11:20am
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JSG



Member Since: 12 Jul 2007
Location: Berkshire
Posts: 2412

United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
I've had both and I'd always go with the Ashcroft txfr box upgrade. John

http://www.hampshire4x4response.co.uk

2011 Tdci 110 CSW XS
Post #98562 7th Nov 2011 11:59am
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jerseyman



Member Since: 21 Jul 2009
Location: Jersey
Posts: 279

At the risk of high jacking this thread, I am also interested in this subject. On long runs to Spain I would like a higher drive - for comfort as much as fuel economy, the trouble is when I actually get there I go up and down steep windy roads when I suspect the higher drive (coupled with the slow gear change) may give me problems. A Roverdrive may be better for me but I have heard they are noisy?
Post #98566 7th Nov 2011 12:12pm
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ibexman



Member Since: 13 Dec 2008
Location: Essex
Posts: 2945

United Kingdom 
Ive had both ,I have ashcroft with remap i still look for 6th gear ??
Post #98567 7th Nov 2011 12:18pm
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jonesie



Member Since: 25 Sep 2011
Location: Petworth
Posts: 231

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Corris Grey
Interesting Ibex,
I was also looking at going the remap route (God only knows where the dosh will come from.)
Got to say that the SI has never left me looking for sixth with the fairey and at one time I was doing 1500 miles a month in it with lots of motorway journeys. The gearing seems spot on so hence my thoughts about an overdrive for the Td5. Also the fairey gives a higher top speed and it manages to slip over the legal quite easily the falling petrol gauge proves to be quite an inhibitor though.
The follow on with this is also why have Ashcroft not developed one and are the current products as durable as the old fairey units? Series I 86" Petrol orig side valve (daily hack)
VW Tiguan ( bit bland but very comfy )
Porsche 997.2
790 Bonnie
Post #98572 7th Nov 2011 12:53pm
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6089

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
I fitted an ex disco transfer box to my 110 (1.2:1). goes really well now. It is "chipped" as well, which helps a lot, but in 5th on the motorway it's great.


And there's no worry of any overdrive breaking and leaving my stranded because no-one supports them anymore.
Post #98652 7th Nov 2011 8:05pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8005

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
i had the same thought process in 2001 and in the end went for an overdrive (GKN one) on a 90 td5.

why

i live in a hilly area
a did a fair bit of towing
i was happy with the std gear range, it was only dual carriageways and motorways i wanted more.
it leaves the option to increase tyre size and still be able to pull it.
vehicle wasn't chipped.

if it wasn't towing as much and lived in a flatter area and found i was not really using first gear then a 1.2 Box would of been the way fwd.

for a cheaper option why not just change the whole T box for a disco one? they go for about £100. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #98667 7th Nov 2011 8:22pm
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Denis O



Member Since: 04 Oct 2011
Location: Maidstone
Posts: 30

2002 Defender 90 Td5 SW Zambezi Silver
Hopefully my first post here can be of some help.

I just bought a 52 plate 90 County which is fitted with the GKN Overdrive. Before the drive back to Kent, 150 miles, I brimmed the tank and achieved 32.6mpg. 90% of the journey was at around 80 on motorways so the reduction in revs certainly has a positive effect on fuel consumption.

It was also reasonably quiet unlike flat out in 5th which was much noisier. Certainly made the journey much more comfortable.

It will work on 3rd, 4th and 5th but it only seems to make sense in 5th at higher speeds.

Now I'm getting used to it I am changing in and out of OD at around 50 which makes the changes almost imperceptable. Over 50 and going into OD is OK but coming out is quite a jolt.

It was not something I had on my wish list but I can see the positives and am pleasently pleased it has it.

Not sure what they cost these days but mine was supplied and fitted in Jan 03 for £1100 and change.
Post #98952 9th Nov 2011 3:55pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8005

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
Denis,

i always used the clutch to disengage mine except when under load, the latter will give a smooth change.

i also found it useful it times for 3 + O/D when towing as you can change up without coming off the power.

other than that it was primarily used as a 6th gear. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #98956 9th Nov 2011 4:10pm
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JSG



Member Since: 12 Jul 2007
Location: Berkshire
Posts: 2412

United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
Denis O wrote:
Not sure what they cost these days but mine was supplied and fitted in Jan 03 for £1100 and change.


IIRC they stopped making them some time ago - I know a few people had problems with them and couldn't get spares.

I had one fitted to my old TD5 110 and it was great - it came with an 'ejector seat' button on the gear knob (well thats what I told the kids). John

http://www.hampshire4x4response.co.uk

2011 Tdci 110 CSW XS
Post #98957 9th Nov 2011 4:14pm
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Denis O



Member Since: 04 Oct 2011
Location: Maidstone
Posts: 30

2002 Defender 90 Td5 SW Zambezi Silver
JSG wrote:
Denis O wrote:
Not sure what they cost these days but mine was supplied and fitted in Jan 03 for £1100 and change.


IIRC they stopped making them some time ago - I know a few people had problems with them and couldn't get spares.

I had one fitted to my old TD5 110 and it was great - it came with an 'ejector seat' button on the gear knob (well thats what I told the kids).


Yes it does have the ejector seat button on the gear lever. It's actually a little too easy to switch when not required. It also stops me buying a couple of nice alloy gear knobs for my gear and transfer box lever.
Post #98964 9th Nov 2011 4:36pm
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DAZ110



Member Since: 06 Dec 2007
Location: East Sussex
Posts: 2035

United Kingdom 2013 Defender 90 Puma 2.2 XS CSW Barolo Black
Is that you Denis O from Biddenden? I've seen your red 90 when going to the bottle bank behind your house.
Are you missing your 50th at all?

Daz110(Also from Biddenden)
Post #98967 9th Nov 2011 4:47pm
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Denis O



Member Since: 04 Oct 2011
Location: Maidstone
Posts: 30

2002 Defender 90 Td5 SW Zambezi Silver
DAZ110 wrote:
Is that you Denis O from Biddenden? I've seen your red 90 when going to the bottle bank behind your house.
Are you missing your 50th at all?

Daz110(Also from Biddenden)


It is I, although the red one is my neighbour Richard.

I sold the 50th back in Feb and missed it so much that I thought I would buy a new 90 and managed to pick up a Td5 90 CSW in Silver a couple of weeks ago. It was a frustrating search, missing some good ones but mostly looking at absolute rubbish that was way to expensive although they all seem to be expensive. Finally found the Silver one in a dealer in Warminster. Low mileage and Air Con so almost like the 50th Shocked except for the rattly engine and the big stick in the middle at the front Very Happy
Post #98980 9th Nov 2011 5:20pm
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DAZ110



Member Since: 06 Dec 2007
Location: East Sussex
Posts: 2035

United Kingdom 2013 Defender 90 Puma 2.2 XS CSW Barolo Black
I thought I noticed you on hanging around the forum.
I'll keep an eye out for you about the village then.

Cheers
Daz110
Post #98989 9th Nov 2011 5:46pm
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chiefstoker



Member Since: 11 Oct 2010
Location: Weston-super-Mud
Posts: 897

England 2005 Defender 90 Td5 HT Zambezi Silver
Maybe you two can get a room Laughing 2005 TD5 90 Hard Top

Beer 'n Sex 'n Chips 'n Gravy

Post #99189 10th Nov 2011 6:54pm
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