Outer Limits 4x4 Board

Gidday All,

I spent about an hour reading everything I could on Crawl ratio, here on outers and it seems very much a wide scope of what people are running.

Its seems the difference between are quite a bit.

EG, Auto and man, Winch or Rocks, Motor size/Torque.

Also read in some threads that the higher the ratio in diff places the stress back in the diffs and away from the potential of breaking gear sets. EG, this set up (S1 gears & 5.1diff) would be better than (S3 gears & 4.3 diffs) Any thoughts on this one??

Can you please post the following:

1/ 4, 6, 8 cylinders, or torque?

2/ Auto or Man

3/ Tyer Size

4/ Trans case gears

5/ Diff ratio's

6/ What you use it for? Touring, Winch events, Rockcrawling

7/ RPM @ 100klms in high range, (May not be applicable to some)

8/ Anything else you think is relevent. Too low? Too High? Just right? Too much RPm at 100k's, etc.

All the best!

Hope this comes up with some interesting reading for all when setting up your rig.

1/ 3.0V6

2/ Man

3/ 285/75R16 (approx. 32.8x11.2-16)

4/ 2.85 (aftermarket)

5/ 4.875

6/ Touring mainly, playing if I get the chance - but I live in Adelaide.

7/ 2700ish (from memory...)

8/ 55:1 overall 1st low. Would prefer lower rpm at cruising, but I don't think the engine would cope. Offroad, crawling is good for a tourer, but it's not a comp vehicle. But low range 5th is also annoyingly low, so there's no pleasing some people.

Crawl calculator: http://www.4lo.com/4LoCalc.htm
My WT Zook:
Transmis Ratio: 3.65:1
TransCase Ratio: 6.50:1
Axle Ratio: 3.90:1
Overall Ratio: 92.527:1
4 cyl (1300cc)
Manual
33x 105" Silverstone mt-117 extremes. (measure 31.5")
3.9:1 diffs.
Rockcrawling mostly.
4400rpm @100km/h in 4th... poor thing hasn't the grunt to use 5th.

1/ 3rz 2.7 efi

2/ Man

3/ 37"

4/ duels

5/ 4.5

6/ Rockcrawling/short course/weekend basher

7/ still regoed but don't drive it on the highway

8/ crawling is awesome, use a hand throttle though

4cyl
man 3.65
39.5
tcase 6.1
diff 4.88
rockcrawling

108 was a good speed for a weekend mannual would be to low for a auto though, used second gear alot but had first there for when it got intresting. would be to low for a comp car aswell, they tend to be more full on.

1/ 6 cylinders
2/ Man
3/ 12.5R20 (42")

4/ Trans case gears - NFI
5/ Diff ratio's - NFI

Crawl ratio of 348:1

6/ Rockcrawling

7/ RPM @ 100klms in high range - N/A, doesn't go that fast

8/ It's a Unimog thing...

1: 4 cyl diesel, 250Nm+ at idle, 500Nm at 2000rpm.

2: Manual 5sp

3: 225/75R16 (29" I think)

4: 3.321 low. 1:1 high.

5: 3.54 diffs

6: Used for offroad touring, work and access to remote areas

7: 2000rpm @ 100km/h

8: With a 5.8:1 first gear low ratio it can idle almost anywhere in high range. It can spin all four on gravel in 3rd high up to 80km/h. Spins wheels on tarmac in second high and is fulltime 4wd.

My Zook -

1/ 4 underfed hampsters

2/ 5 spd Man

3/ 32x11.5 TSL/SX

4/ 5.14 Calmini

5/ 3.7 - Locked

6/ Crawling/trails

7/ Bwahahahahaha come on, its a zook

8/ Works good, just needs more damn HP



Layto....

1/ 6 cylinders, EFI 250X-flow

2/ Auto, C4

3/ 37x13.5r15

4/ 68% reduction LC 60's case

5/ 4.3

6/ Rockcrawling & All Terrain

7/ 3000rpm @100klms in high range

8/ I like it but it has a high rpm to street.

1/ 6 (5.9 Turbo Diesel Unimog U1700)

2/ 8-speed Manual (520 Nm @ 1800rpm)

3/ 52x16R20

4/ 69.1:1

5/ 6.52:1

6/ play

7/ Around 2000rpm

8/ Working Group - 5.76:1 reduction for all 8 forward and reverse gears providing from: 488:1 in 1st, to 37.6:1 in 8th

With Crawler Gear Set - 55.87 reduction for all 8 forward and reverse gears providing from: 4737:1 in 1st, to 364:1 in 8th

patrol42 wrote:4737:1 in 1st

You win

1/ 4

2/ Manual W56

3/ 39"

4/ 2.28 & 4.7

5/ 4.88

6/ Rockcrawling

7/ Mostly used at Idle-1500rpm

8/ 206 Crawl Ratio at the diffs. It could be a littler low for the big stuff.


Jason

1) 4.2L 6
2)manual 7.01-1 first
3)36-14.50R15
4) 2.62-1
5)3.73-1 (soon to be 4.88-1)
6)Everything from mud to rocks and everything in between
7)I think like around 2300
8) I have plans to add a crawl box with 2.72-1

Current crawl ratio is 68.5-1. When I add the crawl box and the 4.88s I will be around 243-1

NUMBER 1
1/ 4cyl diesel NA

2/ Man

3/ 33"

4/ 2.88

5/ 4.7

6/ Offroad fun - some touring

7/ 4000 - too high

8/ 49:1 overall. Not bad but could be lower - bit more power/torque wouldn't hurt either


NUMBER 2
1/ 4cyl diesel NA (3.9L)

2/ Man

3/ 33"

4/ 3.32

5/ 3.54

6/ Touring

7/ 2200ish

8/ 43:1 overall. Could be lower - but engine has plenty of torque

Thanks all that have posted so far.

Looks like deisel and Petrol obviously make a difference too.

Did more reading today seems

Most stock 4bys are about 30 to 60 Crawl Ratio

Winch Set ups are about 60 to 80

Rocks are 100plus

1/v6 petrol

2/man 1st=3.647-1

3/ 31"

4/ 2.370-1

5/ 3.36

6/ weekend toy

7/ 2300rpm@100k

this might help
http://members.optusnet.com.au/~zerosin/gearcalc.html

This might be easier to follow when you cut and paste

1/ cylinders, or torque? = Answer

2/ Auto or Man = Answer

3/ Tyer Size = Answer

4/ Trans case gears = Answer

5/ Diff ratio's = Answer

6/ What you use it for? Touring, Winch events, Rockcrawling = Answer

7/ RPM @ 100klms in high range, (May not be applicable to some) = Answer

8/ Anything else you think is relevent. Too low? Too High? Just right? Too much RPm at 100k's, etc. = Answer

Hilux 2.8 big block slug

Box= 3.93 Manual

Case= 4.7 110%

Diffs= 4.3

Tyres= 32''

Drive= Rocky stuff, Every where i can get with open front, sometimes further

100km/h= 2750rpm

Just right

1st +2nd low= no speedo movement

Overall crawl is 79:1

1) dunny dore 3.8 v6

2) turbo 700 auto

3) front case 2.28 to 1
rear case 4.7 to 1

4) diffs 5.29 to 1

5) tyres 40 inch comp spec Trepadors

6) drive rocks and rutted trails

7) 1st gear low low 176 to 1

dose everything can run heaps of different ratios depending on where im going love it

1/ 4 cyl Diesel - 2LTE

2/ 3 speed Auto + O/drive

3/ 33's

4/ 1st gear - 2.804

5/ Low - 2.566

6/ Diff = 4.875

7/ Crawl Ratio = 35.076

8/ From Touring to rocks

9/ RPM @ 100klms in high range, (May not be applicable to some) = 2800rpm

My WT Zuk:
Transmis Ratio: 3.65:1
TransCase Ratio: 5.14:1
Axle Ratio: 3.90:1
Overall Ratio: 69.5:1
4 cyl (1590cc)
Manual
31x10.5 Cooper STT Armortek
3.9:1 diffs.
General Use and Set up for rock/mud
3400rpm @100km/h in 5th.

1 - 6 banger
2 - Auto
3 - 42"
4 - Trans = 3.07:1 1st, t/case = 2.02:1
5 - Centre = 3.5:1, hubs = 2.13:1
6 - Touring, shopping, Sunday morning lattés
7 - ?? (no speedo, no tacho)
8 - Just under 50:1 with the auto seems about right. Could use some more horses.

1/ cylinders, or torque? = 4cyl 1.3ltr

2/ manual

3/ Tyer Size = 35"

4/ Trans case gears = 6.4

5/ Diff ratio's = 4.88

6/ What you use it for? rocks, hills, comps anything except touring

7/ RPM @ 100klms in high range, would shake itself to death

8/ Anything else you think is relevent. genrally use 2nd for most things but 1st for hi traction technical rock , seems to work good for what i need more torque would be good but copes with out .

cheers

1/ cylinders, or torque? = 6cyl (4.5ltr)

2/ Auto

3/ 35"

4/ Trans case gears = just under 4. (i think about 3.85)

5/ Diff ratio's = 4.3

6/ What you use it for? Touring, and playing around and towing

7/ RPM @ 100klms in high range, 1800rpm

8/ Anything else you think is relevent. gearing is great but for on road it could use more torque

cheers

1/ cylinders, or torque? = 3LT 4cyl

2/ Auto or Man = Auto

3/ Tyer Size = 35"

4/ Trans case gears =3.743:1

5/ Diff ratio's = 4.3

6/ What you use it for? Touring, Winch events, Rockcrawling = Touring & fun

7/ RPM @ 100klms in high range, (May not be applicable to some) = 1850

8/ Anything else you think is relevent. Too low? Too High? Just right? Too much RPm at 100k's, etc. = Just right

Thanks All

Great info,

How about the winch trucks??

What ratios do you use??

Must be planty out there!

1/ cylinders, 1000cc 4 cylinder

2/ Manual

3/ Tyer Size =31

4/ Trans case gears =2.407 in low

5/ Diff ratio's =5.571

6/ The overall crawl ratio =49.842998648999994

7/ Toooo slow for 100kmh it can only do 90 down a hill whith the clutch in

8/ Use it for everethink going bush and on the highway.

9/ She's just right I wouldent have it aney other way.

1/ 3 cylinder, about 100Nm

2/ Manual

3/ 34" Swamper

4/ 6.4

5/ 5.12

6/ Track driving.

7/ 4300

8/ Spot on.

Crawl is about 127:1 Gearing is very nice for my application - 5th is very usable on road. Low range is only good for about 20km/h but high range is low enough that it's not a problem for my application.

Steve.

my GU

1/ 6cyl

2/ Manual

3/ 35s

4/ 3.743:1

5/ 4.88:1

6/ touring mostly, but also rockcrawling.

7/ 2450rpm @ 100k

8/ i would like a lower gear sometimes, but its good enough for now.
on the highway its still the same






83.21 crawl

crawl is 1st multiplied by xfer multiplied by diffs right??