Gear for highway

Get yourself one of these.
If you Google it, you may find a distributor in Italy.
GKN Overdrive only £799 plus vat News from Devon 4x4

Or change the ratios, which I think is a much better bet:

Ashcroft Transmissions

I am going to get these done for mine soon, although the bits are fairly cheap I expect its just as expensive as the overdrive fitting as there must be a lot of work to put the new rations in place.

Anyone had this done who can comment both on the price and the performance ?

Could he not just put a transfer box of a disco on?

iannotts said:

Could he not just put a transfer box of a disco on?

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i was just thinking !!!

buy an overdrive

bloat1992 said:

buy an overdrive

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Surely a secondhand disco transfer box would be cheaper as you can sell the original one on

welcome to the club,
have the same problem, drive more than 25000 miles a year with my 110, need also an overdrive.
funny that LR is not helpful, could be their business...
regards from wales

I still think different ratios or a disco xfer box is a better solution, I cant see how land rover could object as its all their parts and its a simpler more efficient solution that overdrive.

Wont make any difference to low ratio so I dont see any downside? But I would love to hear from anywone who has done it.

why wont different ratios affect low ratio?

slob said:

why wont different ratios affect low ratio?

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I read it somewhere (i think on Lr4X4) but thinking about it cant be right can it.

My reasoning is that is the disco can perform well with these rations then the Defender with the same engine (TD5 in mine) should also be able to. However I havent done it yet and thats why I would love from anyone who know how well this works.

Overdrive always seems like a dirty bodge to me although it does allow you to keep all the original ratios and add a coupe of additional usefull ones.

whats the difference between overdrive and a 5th or 6th gear? or are these dirty bodges aswell

its feckin expensive fer a dirty bodge ffs. you can pick up a transfer box off ebay fer a ton, overdrives cost at least double that

it really depends on which part of the world you are in.

as these items are heavy, they will be heavy on shipment cost too. sometimes the overdrive option might seem expensive up front, as compared to changing the ratio in the t-box. but consider this. the gkn unit is abt 950 pounds but fitting is relatively easy, so you could do it yourself.

changing the ratio in the t-box requires something more than brute strength. you need to pay someone to help you drop the t-box and open it up, fit the gears in and re-fit the t-box. if you don't get the gasket rite, you'll end up with a leaking box. gggrrrrrrrr..... if the guy has never done it before, you can end up with a damaged gearbox too.

however, if you are going to change the clutch plate as well, then go with the ratio upgrade.

Thanks all,
I think that I'll buy an overdrive next year. The price is high but is more usefull.
Faina

GKN Overdrive only £799 plus vat News from Devon 4x4[/quote]

Unfortunately GKN seem to no longer make these. Anyone else know of another source. Maybe if enough of us wanted Defender overdrive units they would re-manufacture a limited quantity.