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Reduction gears
Posted: Thu Feb 02, 2006 2:58 pm
by JayCee83
I know this has been gone over so many times BUT I am looking for gear with around 80% reduction in L/range - calmini sells then for US$450 (AU$600 approx), BBM does not do the series #1 anymore
and abt4x4.com has calmini gears for $1,150.
Alot of people are saying on the web to just go for series #3 rockhoppers but i am only running 31" and i think that will be way too low. Correct me if i am wrong
Please help and suggest any opinions - greatly appreciate it - need the gears soon, sick of stuffing my clutch
Posted: Thu Feb 02, 2006 3:17 pm
by christover1
Try to find a friend with r3 gearing, bolt ya 31's on , and try it.
All the mathematics and paper work can't replace suck it and see.
For example, I worked out I needed 4:6 diffs, and accidently bought 4:9's, and it worked out great...its all a gamble and trial error, sooner or later it'll be cheaper to grab some gearing than replace clutches...
Rock hopper brand gears for S1 seem to break a lot.
christover
Posted: Thu Feb 02, 2006 3:26 pm
by Podge
Edit
Posted: Thu Feb 02, 2006 3:40 pm
by JayCee83
Try to find a friend with r3 gearing, bolt ya 31's on , and try it.
Would love to but at the moment i dont know anyone with series 3, they all drove hiluxs.
you may have a 1.0l is that right?
It is a 1.3lt, the bullbar is just there to hide the exposed radiator due to 2" body lift. Saving up money to made custom one
Its a 91 model. I havn't done much in it so far but enough not know that i need gears. Go to the parks heaps and love rocks
Eventually will enter minor comps.
Posted: Thu Feb 02, 2006 3:47 pm
by Podge
I'm thinking (and that's all it is, a thought) that the Calmini's 5.14:1 set could be the G O for you! There has been times where I have found 4.16:1 still isn't low enough in both high and low on 31s.
Posted: Thu Feb 02, 2006 3:50 pm
by JayCee83
Thanks for the quick advice, appreciate it
They are a bit more $ than the ones i was looking at but when is 4x4 ever cheep
Posted: Thu Feb 02, 2006 4:45 pm
by Nev
I have just put S3 (well apparently they are S3's..bought em second hand..Im still not convinced that they arent only S1 after watching someone with calmini 5.14's on the weekend) in my zook and I run standard NT 3.9 diff ratios and 29's. It is great in low as I can take off fairly easily in 5th and 1st is crawl. Drive most things in 2nd or 3rd but it works great!!! Only problem is on the road.. @ 60km/h it sits at 3000rpm in 4th and at 100km/h (real speeds not speedo reading) it sits at about 4000rpm or more. To get gearing back to normal in high I have figured out I would need 31's and WT 3.7 ratios. BTW can I put WT centres into NT if I swap the flange on the driveshaft...I no you can def do NT in WT...sorry for the highjack. Anyway I reckon if mine truely are S3 then you on ur 31's should be exactly right for highway driving and would have an awesome and useable low range!
Posted: Thu Feb 02, 2006 9:24 pm
by lay80n
I run 31 mtr's on the road and 32 tsl/sx off road on my zook with calmini 5.14's, and am happy with the ratios (using WT diffs with stock ring and pinion). Used to have s1 till i grenaded them, and noticed that sometimes a lower ratio would have been better. Apart from RBZOOK filling my transfer with mud at nissan trials, have had no problem with the calmini's. Even with series 3 gears, you can always just go up a gear in the gearbox if you dont have enough wheel speed. Thats what the gear box is for
Though mine still is a bit revvy for highway use, but to push bigger tyres at highway speed in a car with the aerodynamics of a brick you need to make the engine work anyway.
Layto....
Posted: Thu Feb 02, 2006 11:00 pm
by munecito
Lay80n What size tyres did you use with the S1 and stock diff ratio???
I ask because I have heard people saying that 29´s get you back to stock, but other people say 30's and some other 31's. I don't have a load of money to try all them. So I ask the same question once more.
Thanks.
Will
Posted: Fri Feb 03, 2006 7:47 am
by 84ZOOKSTA
I am correct to say that the series 1's only change the low range and leave high range unchanged?
i run 31's and it is a 1lt zook i need to also change my gear ratios but you can only get a series 1 for the 1lt transfer, is there any thing i can do to change the high range ratios by about 12%.
Cheers
Simon..
Posted: Fri Feb 03, 2006 8:51 am
by Podge
Providing you have the correct transfer case ie. 1.0l series II on (8/83+ w/4WD light switch) you can fit most reduction gear sets. You are right that a 4.16:1 gear set will not change your high range ratio as this gear set utilises the 1.0l input. Only the gear sets with a lower ratio than 4.16:1 will change your high range eg Calmini's 5.14:1 will reduce your high range by about 6% and a 6.4:1 by about 10%.
Podge
Posted: Fri Feb 03, 2006 9:32 am
by 84ZOOKSTA
So where would i start to look for the set to suit the 1lt transfer case?
Do i just buy the one to suit the 1.3 and not install the input shaft?
Cheers
Posted: Fri Feb 03, 2006 11:49 am
by munga
look for used ones (and wonder why someones selling them) or buy new from usa.
i think you can get the calmini 5.14s for around 700 landed in aust (dont quote me, search to be sure).
Posted: Fri Feb 03, 2006 2:00 pm
by JayCee83
Does anyone know of someone running series 4 rockhoppers in their sierra. Preferably running 31" with standard diff ratios. Long shot i know but you can only try
Posted: Fri Feb 03, 2006 10:48 pm
by Pat Murray
I used to run Series 1s with 31s and always felt that they were only JUST low enough. In Tassie we obviously get a lot of goopy mud and 2nd. was the go with Series 1s for most holes, but, when you needed a bit more reduction--1st. was all revs. and no go! I now run Calmini 5.14s with 32s and have to say that it is just perfect. 3rd. will carry me through most of the sloppy stuff and reaching for 2nd. still gives a heap more urge. Low low feels just right for the rocks-- without the risk of bustin' Birfields on full lock! On the road it is as close to standard gearing (assuming standard tyres) as you could want. For the conditions I operate in I could not be happier--but hey, horses for courses eh?
Posted: Sat Feb 04, 2006 12:02 am
by Gutless
JayCee83 wrote:Does anyone know of someone running series 4 rockhoppers in their sierra. Preferably running 31" with standard diff ratios. Long shot i know but you can only try
Its my understanding that the importer of these gears has been stuffing people around for months saying that they will be here soon, or next week and other crap like that.
Are there actually any series 4's in OZ yet?
Posted: Sat Feb 04, 2006 1:48 pm
by lay80n
I was running 31 MTR's or 31 BFG muddies with the series 1's. From memory rock hopper series 1 lower the high range 12%, and low range 83%. Calmini 5.14 lower high range 18% and low 127% or something like that.
Layto....
Posted: Sat Feb 04, 2006 11:58 pm
by derelict_frog
I just put rockmonster 4.16 in mine 2 days ago from abt4x4.. havent used it much but i can acctually drive slow now.. (i am driving up banks all around the place with ease that i woudlnt even attempt before!)
Shoudl be good on some tracks too!
And yes they shoudd save my clutch to lol.. it use to start smelly pretty much everytime i got stuck.
Posted: Sun Feb 05, 2006 1:54 am
by 84ZOOKSTA
derelict_frog wrote:I just put rockmonster 4.16 in mine 2 days ago from abt4x4...
What was the total cost from abt4x4 and what size tyres do you run?
cheers
Posted: Sun Feb 05, 2006 10:41 am
by zooker
84ZOOKSTA wrote:derelict_frog wrote:I just put rockmonster 4.16 in mine 2 days ago from abt4x4...
What was the total cost from abt4x4 and what size tyres do you run?
cheers
it says he runs 31" mongrels in his sig line