Vehicle & Technical > Defender

High Range Gearing

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Bush Tucker Man:
Having been (comparatively) spoilt with the Discovery for the past 3years, I'm begining to feel that the 110 is a bit too low geared.

I did a brief motorway run this morning (M62; jct 31 to 27) to meet up with 'Jim-Willy' (superb Gingerbread, J-W. My extreme compliments to your mother =D>  =D> )

I took notice of the tachometer reading, it was 2,000RPM (in 5th) at approximately 45mph.
Having said that, I was out in the Fabia prior to that, & that was also showing 2,000RPM (in 5th) at 45mph (it's not got a lot of torque, so lower geared than the bigger engined examples)

So, I suppose the options are;
1. Replacement high-range gearing (Ian Ashcroft, or similar?)
2. GKN Overdrive (expensive, but flexible, but also read a couple of bad stories)
3. 'Rover-Drive' (Canadian?/American?, not very common over here?)


4. 'Go with the flow & just take it easy, well I usually do, it was extremely rare the Discovery went above 60mph

H:
this will probably sound like sacralidge to defender fans but .... will a disco gearbox fit on?

H

Budgie:
It's not the gearbox you would change, it's the transfer box.

The transfer box you have in the TD5 is a 1.4:1 ratio, if you changed it for a 1.22:1 box out of a Disco then that would give you more legs on the Motorway and the low box would stay the same as it is now.
This OK as long as you don't got too large on the tyre dia' as it could go the other way and be too overgeared!!  :?
 
I went the other way cos' of the large dia tyres and fitted a 1.4:1 t-box in the Disco.
So guess what I've got in my garage that could be brought down to the Spring Adventure!!  :mrgreen:

Xtremeteam:
disco box -no
transfer box-yes gives you an increase from 1.41 to 1.2 ratio i think,although it might already have a higher ratiobox due to it being a td5

Bush Tucker Man:
Not too sure on the ratio of the transfer-box fitted.

I don't intend going bigger than 235/85's. BUT, I have seen pictures of a 110CSW with Michelin 8.25's fitted
Don't want to lose any steering lock though

An overdrive is the most logical solution, as you still have a good spread of ratios for towing.
The High-range increase is wallet-led, but it will still undoubtedly (allowing for gearing increase) cope with what I want it to tow

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