Clutch and lower gears

[happygu]

Disrtributor - not too far from you.....

EUROPE
OUTBACK IMPORT SAS
Z.A Mathias Sud
26320 St Marcel-les-Valence France
ph +33 (0) 4 75 85 10 48
contact@outback-import.com
www.outback-import.com


KARLOWICZ 4x4
Igor Chojnacki
ph. 00 48 502 22 72 44
info@karlowicz4x4.pl
www.karlowicz4x4.pl

[patrolone]

Thank you very much for your help mates!

[patrolone]

Back on this thread again...
I have installed an heavy duty clutch.
According to the mechanic, the tires are big (not too big) and the original 4.625 ratio is near to the limit of his range so in the daily driving the clutch suffers.
For this reason he thinks' better to change the diff ratio to a lower 5.43 because it take two benefits: less stress for the clutch during on road driving and a real lowering when offroading.
The only lower ratio for low gears in the transfer case may not exclude the hard working of the clutch in daily driving and if you take a look to this chart I think is not completely wrong..... http://www.4lo.com/calc/geartable.php

what do you think?

[macca86]

Two sets of tyres maybe 31's for road big ones for play

[MudRunnerTD]

I think your mechanic should go back to working on Arctic Trucks running 42" tyres!,

DONOT CHANGE YOUR DIFF GEARS TO RUN 35s or less. Plenty of guys in Australia running 35s on a 2.8 and probably NONE of them have 5:4s in.

Install 85% Low Range into your low range and never look back

Your fuel economy would be terrible running with 5.4s it would be revving high at hwy speed

[patrolone]

MudRunnerTD,
did you see the linked chart?

[Alitis007]

5.4:1 is higher then 4.6:1, if you want lower the number get smaller not higher!

If your wearing clutches out that fast you need to adjust your driving style!!!

[patrolone]

Alitis007,
I know 5.4 is HIGHER than 4.6 but I mean that with 5.4, instead of 4.6, and 34'' tyres the car goes slower.
Maybe the driving style is to be considered too, but I'm only trying to do the right choice in order to fit the setup of my car the nearest to my needs and this is what I'm looking from this forum.

[Alitis007]

Alitis007,
I know 5.4 is HIGHER than 4.6 but I mean that with 5.4, instead of 4.6, and 34'' tyres the car goes slower.
Maybe the driving style is to be considered too, but I'm only trying to do the right choice in order to fit the setup of my car the nearest to my needs and this is what I'm looking from this forum.

As said before your more likely to get a better result by changing you transfer case gearing then your diff gears. From what you posted earlier your goal is to change the final drive ratio in 4L for crawling.

Try and remember that a bigger wheel doesn't turn slower it is just harder to turn but travels further in 1 revolution.

So what are you trying to achieve??

[MudRunnerTD]

George he is trying to use the gear ratio in the diff to relieve the clutch and allow the torque of the motor to help turn the 34s easier. His mechanic is saying that the 5.4s will turn the 34s easier, yes they will but your cruising speed will see you engine revs considerably higher and your fuel use age will increase.

Given that most real force will be exert through your drive train while in steep and rocky country crawling in L4 turning your 34s (small tyres in Australia) your driving style sees you riding your clutch in these instance to help your little 2.8 crawl effectively. Swapping out your Low Range transfer gears for a 43% or even an 85% reduction gear will change your world mate. With 85% reduction you could point your car up a 35degree hill, put it in L1, let the clutch out, let it start driving and GET OUT OF THE CAR AND WALK and beat it to the top! Seriously!

Reduction gears would be like fitting a Massive Turbo to the Low Range mate! But without the need to spool the turbo through the clutch like you are now