Thread: Anyone run an overdrive on their TD5 Defender?

Not sure why you would want an overdrive for a 5 speed TD5, or if anyone actually makes one.

I guess if you wanted to reduce rpm in high range you could fit a LT230 out of a discovery instead which has a 1.2:1 high as opposed to 1.4:1.

They are available, or at least they used to be. I was reading an article about them only a few days ago. The magazine was a couple of years old though. I will try to dig it up and get some details.

GKN make an overdrive for the R380 (from what I understand it is more like a splitter). They are bloody expensive (think ~$3,000).

Bruce Davis Performance Landys in Sydney does fit them.

Apparently excellent for getting even better economy, but at $3,000 that is a hell of a lot of Kms to do before you were in the black. 8O

Here is some information on the GKN:

http://www.devon4x4.com/products/25/Overdr...5/GKN+Overdrive

Just google 'GKN Overdrive and Land Rover' and you will get a stack of hits.

GKN I think are also the manufacturer of the diffs and driveline for the D3, so I presume they make good gear.

The GKN unit is $4,000 fitted. They are a ripper though, and cabin noise at 110kmh is far less intrusive. Reputed fuel economy at that speed for hours on end is around 7.5L/100km from a Td5 Defender.

Originally posted by Omaroo
The GKN unit is $4,000 fitted. They are a ripper though, and cabin noise at 110kmh is far less intrusive. Reputed fuel economy at that speed for hours on end is around 7.5L/100km from a Td5 Defender.

Just buy a 4 speed ZF instead

Given Omaroo's figures, and that I get 10l/100km out of my Td5 Fender, that means it would take 123,000km to break even with fuel at $1.30p/L.

Then again you may extend your engine life by operating at lower kms, although this is my non educated stab at engine wear logic.

However, being able to hear yourself think, hold a conversation and answer a mobile phone would be big pluses in my mind...

And give my TD5 runs 15l/100km its only 53 tank fulls for me to break even.

About 6 months :wink:

Cheers
Mike