Overdrive options

Chris Armfield · Jan 22, 2017

Hey guys,

Does anyone know what over drive options there are for my landy?
It's sweet off-road or about town but is seriously lacking on the motorway.
1984 land rover 110 pick up 2.5L NA diesel LT77

Cheers!!!

Turboman · Jan 22, 2017

Chris Armfield said:
Hey guys,

Does anyone know what over drive options there are for my landy?
It's sweet off-road or about town but is seriously lacking on the motorway.
1984 land rover 110 pick up 2.5L LT77

Cheers!!!

Petrol or diesel?

Huddy84 · Jan 22, 2017

Is it the na diesel? If so its worth checking which ratio transfer box it has. Ultimately more gearing will reduce power / gradient climbing ability on fast roads.

Turboman · Jan 22, 2017

Huddy84 said:
Is it the na diesel? If so its worth checking which ratio transfer box it has. Ultimately more gearing will reduce power / gradient climbing ability on fast roads.

That was sort of where I was going with it. Will he have enough power to pull the increased gearing.

Marmaduke · Jan 22, 2017

Also what size are your tyres?

Chris Armfield · Jan 22, 2017

Turboman said:
Petrol or diesel?

Sorry it's a diesel

Chris Armfield · Jan 22, 2017

Marmaduke said:
Also what size are your tyres?

205, R16

Turboman · Jan 22, 2017

Chris Armfield said:
205, R16

Looking at your avatar, if those are the tyres, maybe 205 75 R16? If so, you would get a bit of extra speed from 7.50R 16, which is the standard tyre for that landrover.

Try and check the actual diameters, they vary widely even within sizes. Cant see you would go far wrong with Rangemaster.

Chris Armfield · Jan 22, 2017

Turboman said:
Looking at your avatar, if those are the tyres, maybe 205 75 R16? If so, you would get a bit of extra speed from 7.50R 16, which is the standard tyre for that landrover.

Try and check the actual diameters, they vary widely even within sizes. Cant see you would go far wrong with Rangemaster.

The ones on there are 205 R16C 8PR 110/1080

Turboman · Jan 22, 2017

Chris Armfield said:
The ones on there are 205 R16C 8PR 110/1080

As I say, try actually measuring them, and compare with a range of actual 7.50 R16s. Even an extra inch on diameter is more than an extra three inches travel on each revolution.

Chris Armfield · Jan 22, 2017

Turboman said:
As I say, try actually measuring them, and compare with a range of actual 7.50 R16s. Even an extra inch on diameter is more than an extra three inches travel on each revolution.

I've seen a lot of discussion on 7.50's or 235/85's
And the 235's being a bit thicker, have you had any experience with them?

Turboman · Jan 22, 2017

Chris Armfield said:
I've seen a lot of discussion on 7.50's or 235/85's
And the 235's being a bit thicker, have you had any experience with them?

I stay as thin as possible, for a variety of reasons, to do with use and reliability. Your vehicle was designed for the loads that 7.50R16s will impose on the suspension and steering.

I have several sets of tyres for my Ninety, to permit different usage. One set are Fedima Maxima 7.50R16. They are about maximum diameter you can get under the arch, but barely wider than 7inches. Look at them in my members vehicles thread if you like. They are pretty quiet on the road too, not much tread in the middle.
But, like I said, the Rangemaster were standard on that.

Brown · Jan 22, 2017

Whilst you can adjust the effective gearing with tyre size of course, there's still the option of fitting an overdrive. I'm about a year into living with a Roamerdrive unit which I fitted last Christmas and it seems to be working well https://www.landyzone.co.uk/land-rover/building-the-gearbox-of-my-dreams.293835/

Overdrive options

Chris Armfield

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Turboman

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Huddy84

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Turboman

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Marmaduke

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Chris Armfield

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Chris Armfield

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Turboman

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Chris Armfield

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Turboman

Mab An Gov

Chris Armfield

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Turboman

Mab An Gov

Brown

Well-Known Member

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