Outer Limits 4x4 Board

Hey

Posted a similar question in the Nissan section but i want more input.

What are other peoples thoughts on running a ratio of 4.375 in the rear and 4.300 in the front?
I thought it may cause abit of binding and something will end up snapping.

bad idea, you'll wind up your transfer case quick

It is ok to run SLIGHTLY different ratios - altho 0.075 is probably a bit much.

That said MOST of the time you would be using 4x4 is going to be on loose surfaces, and even if there was a bit of windup - I doubt it would kill you t/case unless you tried it on road.....

part time 4wd?

id run it .075 is nothing

May I ask why? Diff availablity or something...

I personally wouldn't, but sounds like some people would. If the vehicle had a centre diff it would be a piculular way of transfering more torque to the lower end (or am I just tired).

I've seen a transfer go bang with 4.11 n 4.1 ratio's in a 75 series

nasty troll do you realy think thats what caused it?
the difference between makes of tyres or a brand new compared to half worn tyre is more than .1

add it up over the amount of turns at 80km/h. I would not have thought it would of been the problem, but did see it. Must have been the shitty toyota tranfer huh

add it up over the amount of turns at 80km/h. I would not have thought it would of been the problem, but did see it. Must have been the shitty toyota tranfer huh

nastytroll wrote:I've seen a transfer go bang with 4.11 n 4.1 ratio's in a 75 series

thats because toyotas are weak

justinshere wrote:Hey

Posted a similar question in the Nissan section but i want more input.

What are other peoples thoughts on running a ratio of 4.375 in the rear and 4.300 in the front?
I thought it may cause abit of binding and something will end up snapping.

i thought u were after 4.88 or 4.6

nastytroll wrote:I've seen a transfer go bang with 4.11 n 4.1 ratio's in a 75 series

Not doubting the T/case went bang - but i REALLY seriously doubt it was the 4.10 & 4.11 difference.
Infact for the dana diffs 99% of the time the ratios will be mixed 4.10& 4.11, or 4.56 & 4.55 etc....
Also I have seen people drive on dry bitumen with the t/case locked in 4hi (they wanted to upgrade) and drive over a few days the transfer case still showed not signs of damage - but it was a pig to turn untill the tyres slipped a bit

Anyhow my point is running different gears expoding t/cases is bit of a myth. The most common cause I have seen is where the prop shaft slip has been neglicted of grease, seized and the smashed the t/case.

also who the hell does 80k in 4wd on a hard surface?
they prob deserve there transfer to blow up and lodge in there but.

yes for verry short distances between tracks or on the beach but neither of these will cause wind up

Highway-Star wrote:May I ask why? Diff availablity or something...

I personally wouldn't, but sounds like some people would. If the vehicle had a centre diff it would be a piculular way of transfering more torque to the lower end (or am I just tired).

Hilux front and GU rear - for the moment

j-top paj wrote:

justinshere wrote:Hey

Posted a similar question in the Nissan section but i want more input.

What are other peoples thoughts on running a ratio of 4.375 in the rear and 4.300 in the front?
I thought it may cause abit of binding and something will end up snapping.

i thought u were after 4.88 or 4.6

Yeah that would be ideal BUT i wanna get the truck started and if i can get away with running 4.3 and 4.375s with no probs i will do that for a little while.
After the post in the nissan section ive decided i want to run genuine gearing not aftermarket. So 4.6 will be the go but 4.3s might have to do in the meantime.
I dont want the 4b to be off the road for anylonger than a weekend and it wont take any longer than 2 days to change out the rear diff.
Front will take longer cos of steering etc

just do it. and keep in the back of your head its not exactly perfect so dont drive on bitumen or the like in 4wd:P

justinshere wrote:

Highway-Star wrote:May I ask why? Diff availablity or something...

I personally wouldn't, but sounds like some people would. If the vehicle had a centre diff it would be a piculular way of transfering more torque to the lower end (or am I just tired).

Hilux front and GU rear - for the moment

Got ya.

In a strange way I would relate it to running a weded diff on road. Its not the best analogy, but you see my point? If you have to do it, try it; then tell us how you go with it, so any future people can see if had any adverse effects.

Not really.

If it am right, the difference is about 1.7%, which doesn't sound like much, but with 33" tyres, the difference is 45mm per turn of the tyres. in 60 turns of the tyres, (or 162metres) you will be one whole turn of the tyres out.

On a hard surface, that will destroy a transfer case. (Doesn't have to be tarmac - smooth hardpack dirt would do it.

Many years ago, I was running a 33's with a 31 as a spare. Anyway, I had a flat and my G has no freewheeling hubs, so one front wheel was running a 31 and the rear was on 33's. Now I grant this is a 7% difference.

Anyway, I accidently bumped it into 4wd on the highway and the binding was so bad it was like a just jumped on the brakes.

Ford always used to run 4.09 front and 4.11 rear in their f series, but that is pretty insignificant. (0.4%)

Steve.