I want to put taller diff ratios in my pajero to help with fuel economy particularly around town. Has anyone done this or have any advice etc????

I have changed diffs on 2wd's but not on 4wd's due to the problems with transfer box, auto and engine management systems. Have you though about increasing your tyre diameter? You can get the same result and have better off-raod ground clearance. You will suffer on the performance, low end torque and suspension. Talk to your local tyre man about some 33 or 34" BFG-AT's. You won't be dissapointed.

Jim
NZ

G'Day Jim,

Thanks for the tip. i hadn't thought of that and it is a much simpler exercise than changing the whole diff. Will let you know how it goes..... I don't think the low end torque will be too much of a problem as you can practically get off the line, even up hill, in second at the moment. Why would the suspension suffer??

Go the Wallabies ;)

Ash

The suspension or ride of your truck will compromised by the larger tyres because of the height difference, centre of gravity and sidewall stability. Basically you willl get a little more body roll when cornering. The larger tyres also put a bit more of a strain on bushes and sway bars (due to height and tyre mass) which means if they are a bit worn the truck will tend to exagerate the movement. On some sloppy suspension parts the vehichle will try and follow every crack in the road making it difficult to track. If you install the new tyres get them balanced and a wheel alignment done at the same place. They will be able to advise on what's best. On some models you may have to put in a lift kit which generally has stronger suspension bushes, etc. If you are only going up a size or two it probably is not necessary.

If you want to have a look at a Pajero with this set-up look at "jeepir" introduction on this forum. He has put allot of time and $$ into his truck but he uses it in the bush more than most. His website will give you some close shots of his adventures.

Jim

The thing that you should keep in mind is: think of if you would have a "flag pole" the thing you have in the garden to show the flag, I really do not remember the english word, sorry.. :unsure: :unsure: :unsure:

The higher you`d like to show the flag, the deep`er you have to ground the pole, or wider, the same is with a 4x4 Rig.. The higher you`d like the Rig to be, wider you have it to be as well.. Like:

I have 3" inch Bodylift-kit and a around 1" suspension, could be 2" high and I rund with 36" 14,5 on a 10 inch wide rim, with ofcourse wider fender flare, if I`d like to go real offroad I use my 35" 15,5 Super swamper on the same scale of rim..

I have a few contact`s at Iceland and the strange thing up there is that it is rather common and normal with rather bad 4x4 accidents up there, but this normally include standard 4x4, and not this big rig`s with 38" and 44" inch tyre.. A fact could be that those Rig`s are mostly driven by rather experienced driver`s or they are a bit more secure than other`s.. The basic is that if you start modyfication on a 4x4 there are no short cut`s, ofcourse it could be, but at that point you risk something more important than other thing.. That`s why I always say, are you sure you would do something like that.. Because a big rig with big wheel`s look`s very smooth and cool, but with that i brings a lot more tension in what you really are do`ing.. You have to look more into the rig like service and a lot of repair to see that everything works as it suppose to do and so on.. :huh: :huh: :huh: But if there is enything, I`l try to answer eny question that is posted at www.jeepir.com under the guest-book :D