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Lambley



Member Since: 20 Apr 2013
Location: Mid Devon
Posts: 1435

United Kingdom 2006 Defender 90 Td5 HT Java Black
Gear ratio's on a 90....
Thinking of getting Ashcroft to swap the gear ratios to 1.2 from the standard 1.4, I've had a tune for more torque etc, and it runs very well now, not done 25k yet so it's still a nice fresh engine.
There are a few posts saying that it will improve motorway driving and makes it quieter (!!) but how about general 'round town' driving, will 1st gear become like puling away in 2nd, and will it put extra stress on the engine in the long run? Anyone done it with good results?
Post #233306 7th May 2013 5:40am
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6096

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
I did it on my 110 a year or 2 back.

Yes, 1st gear is a bit higher; on the flat not noticible, but on a steep hillstart you notice it. If i had my 255/85's on then i would slip into low range to pull away on steep hills, but on the standard 235's low box isn't needed.
If you've got a nice torquey engine (i've got a VGT turbo too) with good low end grunt, you find you don't have to change gear as much either, just leave it in 3rd or 4th.

Bear in mind this is a lardy 110 station wagon with full cage, so it's pretty heavy. A much lighter 90 this problem isn't going to be as bad.

But in all, i'd do it again (in fact, will be on my 90 whenever a good priced 1.2:1 box turns up). makes for cruising much better, and a bit quieter too.
Post #233309 7th May 2013 6:02am
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Les Brock



Member Since: 20 Mar 2012
Location: Stroud, Glos
Posts: 152

United Kingdom 
diesel_jim wrote:
I did it on my 110 a year or 2 back.

Yes, 1st gear is a bit higher; on the flat not noticible, but on a steep hillstart you notice it. If i had my 255/85's on then i would slip into low range to pull away on steep hills, but on the standard 235's low box isn't needed.
If you've got a nice torquey engine (i've got a VGT turbo too) with good low end grunt, you find you don't have to change gear as much either, just leave it in 3rd or 4th.

Bear in mind this is a lardy 110 station wagon with full cage, so it's pretty heavy. A much lighter 90 this problem isn't going to be as bad.

But in all, i'd do it again (in fact, will be on my 90 whenever a good priced 1.2:1 box turns up). makes for cruising much better, and a bit quieter too.


Jamie,

Got a surplus 1.2 LT230 here, 28 tooth, came off Tim's V8 as far as I am aware really low mileage.

Regards

Les
Post #233333 7th May 2013 8:11am
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achuakh



Member Since: 12 Apr 2012
Location: Singapore
Posts: 158

Singapore 2002 Defender 90 Td5 SW Oslo Blue
You will find its ok. Lets face it. Singapore is indeed town driving everyday. I get stuck in traffic all the time. I've got a 1.222 swap and I'm way much happier. If you don't tow, it's fine. Uphill down hill it's ok. Serious. You've got a remapped engine, so I assume tis a td5. I'm happier with this setup over a 1.41 ratio. From the land of the most expensive land rover defenders on planet earth. At �125k for a XS 110 csw and you get to own it only for 10yrs! Please find me a good reason to stay on this island.
Post #233379 7th May 2013 10:49am
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1423

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
Paul,

Its something I contemplated long and hard about. I even had it booked in at Ashcrofts and then got cold feet Embarassed I do a bit of towing, and need to be able to as required, exhaust gas temp was main concern Whistle In the end I decided it just wasn't worth it. Took out the cat, fitted a louder stereo and I'm happy Cool Try pulling away in 2nd gear, it will give you an idea as to what 1.2 transfer box is.(it'll take some getting used too Whistle )
Post #233384 7th May 2013 11:10am
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Lambley



Member Since: 20 Apr 2013
Location: Mid Devon
Posts: 1435

United Kingdom 2006 Defender 90 Td5 HT Java Black
Thanks for the replies, I don't do much towing and if I did it'd only be a light load of logs but I probably need to give it some thought, my brother in law had it done from new and swears by it, I'll drive his next time I'm over there.

On a side note... Are Barbell-Jim and Diesel-Jim related?!
Post #233386 7th May 2013 11:32am
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diesel_jim



Member Since: 13 Oct 2008
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Posts: 6096

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
It's not quite as bad as second gear pulling away... maybe 1 3/4 gear



Lambley wrote:
On a side note... Are Barbell-Jim and Diesel-Jim related?!



Nah, unless he's ginger and ugly as well?





















In which case i've got an uglier brother.... Rolling with laughter
Post #233439 7th May 2013 2:12pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Don't have any problem with 1st gear following a swap to a 1.2 box in my 90, and I'm on 265/75 tyres too.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #233447 7th May 2013 2:35pm
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big steve



Member Since: 24 Dec 2009
Location: hertfordshire
Posts: 2456

United Kingdom 2015 Defender 90 Puma 2.2 HT Montalcino Red
It's just like driving a disco 2 Thumbs Up

Steve 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P
hybrid turbo in build -done ready to fit
ashcroft atb in transfer box
6 speed auto in build
Post #233459 7th May 2013 2:55pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

United Kingdom 
Not quite - a standard Disco 2 is on smaller tyres, which reduces the gearing significantly. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #233464 7th May 2013 3:04pm
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big steve



Member Since: 24 Dec 2009
Location: hertfordshire
Posts: 2456

United Kingdom 2015 Defender 90 Puma 2.2 HT Montalcino Red
Well ok lol ours is on 265 75 16s sorry 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P
hybrid turbo in build -done ready to fit
ashcroft atb in transfer box
6 speed auto in build
Post #233478 7th May 2013 3:25pm
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Luismi



Member Since: 04 Nov 2010
Location: Cotswolds
Posts: 178

Spain 2004 Defender 110 Td5 SW Alpine White
This is quite a subjet as i been trying to figure it out wihich will be the best ratio for my TD5, i own a puma before and i intend to achieve a similar thing

To fix some point, changing the transfer from 1.41:1 to 1.211:1 with the standard 3,54:1 and 31 tyres at 800 RPM we will go at 8.17Km/h instead of 7.01km/h in the original setup, and as Diesel Jim says you will notice on hills.

of Fifth gear let say at 3000 RPM you will go at 134.88 Km/h instead of 115.85Km/h in this case to compare with a PUMA that has oviously different gearbox ratios will go at 139.98Km/h this means that your car with the 1,211:1 will go 3.64% lower than a puma.

Hope this helps
Post #233570 7th May 2013 7:01pm
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yobbie



Member Since: 15 Nov 2010
Location: Isle of Wight
Posts: 713

United Kingdom 1999 Defender 90 Td5 Heritage LE Bronze Green
Or use an overdrive, 28% higher than standard so 30mph/1000rpm compared with standard 23mph/1000rpm so 60mph is a nice relaxed 2000rpm. Just higher than 6th on a Puma but you get to keep the standard gearing as well Mr. Green
Post #233627 7th May 2013 8:20pm
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Luismi



Member Since: 04 Nov 2010
Location: Cotswolds
Posts: 178

Spain 2004 Defender 110 Td5 SW Alpine White
Yobbie you have the overdrive with mechanical actuator or electrical?

That is actually a good point as may be the most cost effective and versattile way to have the most of your ratios
Post #233632 7th May 2013 8:46pm
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yobbie



Member Since: 15 Nov 2010
Location: Isle of Wight
Posts: 713

United Kingdom 1999 Defender 90 Td5 Heritage LE Bronze Green
Mechanical as an extra gear lever it's a Roverdrive now known as Roamerdrive.
Post #233638 7th May 2013 8:54pm
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