Bigger 5th or 6th gear for 76 series landcruiser

Something that I have thought about but I have no idea what you would swap it with. In the good old days Holden ran the same gear box with 3 different diff ratios, now.... ??? Don't suppose you know the answer for Toyota?

Thank you.

Terrain Tamer make, or used to, a replacement t'case gear set that would drop high range gearing by 9%. Also had other option with lower gearing in low range, and combination of the two.

Think they had kits for early HJ45's, 75 & 80 series. Don't know if the 80 series kit will fit these later V8's? Certainly a cheaper alternative if they did.

Also recall that Mark's Adapters did a similar kit, but they had a "better" bearing setup, so needed some machining to fit it.

Bob

So right Alby,
just did a few rough sums
unit they are offering gives 22% overdrive
it would be unlikely you would ever achieve a 22 % reduction in fuel usage (100% efficiency) but for ease of maths i used 25%
my 2009 VDJ79R has averaged 16llitres/100 for the 200,000km its done
with diesel at $ 1.30 a litre it would take over 150,000 km to break even on a $7900 outlay

if I could even achieve a more realistic 15 % reduction in fuel usage it would take 243,000km to get my money back
thats another 7 years driving so no thanks
cheers
Howard

I don't use mine as a tug but from what I have read from those that do say they get the same consumption towing in 4th as 5th so maybe there are not big fuel savings to be made?

A bigger issue is their brick like shape aerodynamics which you cannot overcome

I have increase wheel size to 33 inch and find it a better ratio setup than stock

Your dead right, at 7 plus grand it will take forever to recoup my money.
Bigger tyres are something else I've been looking at but now I'm a little nervous on that one too. A guy at work bought the new ford Ranger and was averaging 700kms to a tank, he wanted to improve it so lifted it and stuck 20 inch rims and I believe 33s under it. He's now getting 150 kms less to the tank, Not to mention scrubbing every time he turns and goes over a pothole.

Agreed. While that torquey V8 will pull most loads with ease, trying to get good fuel economy at high speeds from a vehicle with the aerodynamics of a house brick, is in my humble opinion akin to trying to make strawberry jam from a wheelbarrow load of pig poo.

Fitting any method to achieve a lower engine RPM will most likely result in a quieter ride but the possibility of getting better fuel consumption is unlikely. In my opinion, and obviously others, the fuel consumption would most likely increase.

Try lifting the right foot a little.

Cheers
Pop

On the contrary I think your missing the point of this vehicle. If I wanted to plod along at 85 - 90 kms hour when I'm towing then I would have bought something else. when It takes at least 1,500 kms to get anywhere interesting or somewhere I haven't seen a dozen times already then I want to get their at the speed limit and not 20kmh less.
I enjoy hooking up the camper and going pretty much almost anywhere I want with it.
I enjoy loading up the toys on a trailer and following my mates somewhere and turning up the same time they do, and I must admit I like the fact my wife can hook up the horse float and take that nag wherever she wants and she can safely overtake those people that sit on 90, with enough grunt to get around them and back on the right side of the road as soon as possible.
The only thing I sometimes wonder about is the fuel consumption and if there's a feasible way of getting better fuel economy without loosing out on the other benefits.
I did a lot of research before I bought this vehicle and I am more than happy with it, I knew the fuel consumption figures and I was happy to accept it, knowing that horsepower and torque don't come out of thin air (well actually they do, there called turbos and superchargers but eh.)
If I couldn't afford to run it then I wouldn't of bought it, but I can so I do. The question is always worth asking though.
Thanks for your help everyone and happy travels.
Cheers.
:-)

oetkb,

You could try fitting a Hi-Clone. I have heard that they will give you better fuel consumption, an increase in power and wash your shirts whiter than white.

Oh, while you're at it try re-reading your first post.